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Table of Content

    20 June 2007, Volume 29 Issue 3
    专家论坛
    FINITE ELEMENT ANALYSIS FOR A DOUBLE HELIX SINGLE SCREW PUMP BUSH
    CHEN Ci-chang WEI Cun-xiang SHAN Dai-wei et al.
    2007, 29(3):  1-3.  DOI: 10.3863/j.issn.1000-2634.2007.03.001
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    The finite element calculation is made to stress situation of the doublehelix single screw pump by the use of common software (ANSYS). The deformation, stress and strain's distribution of the doublehelix single screw pump bush are discussed when the bush is under equal pressure, disordered pressure and the static contact with the bush and screw. The stress state and deformation regularity of the doublehelix single screw pump bush are revealed, and the influence of condensability of the bush material on the deformation discussed, which offer the reference to the optimal design of the structure and the performance improvement of doublehelix single screw pump.
    地质勘探
    THREE DIMENSION CRUSTAL STRUCTURE AT THE NORTHWEST CORNER OF TARIM BASIN
    LAI Xiao-ling LI Jin SUN Yi
    2007, 29(3):  4-6.  DOI: 10.3863/j.issn.1000-2634.2007.03.002
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    Using Q value tomography and hypocenter distribution image, the 3D Qvalue structure and the seism starting time image are obtained in midupper crust in Jiashi seismic area. The results show on the horizontal sections at the different depth, every Q value image exists low Q value zones, main orentation is EW striking, NNE striking and NNW striking, which are respectively corresponding with Keping fault, Yangdaman fault and Maigaiti fault in the study region. It is supposed that the low Q value zones are probably deep faults in study area. On the other hand, on the vertical profiles, large area of low Q value zones exist along belt of 77°E and Q value structure of two sides of this belt are obviously different. Seism starting time plane image displays that dominate orientation is NNW and NE, which intersects with the after shock concentration area. These features are the active structural setting of this area. And it provides deep tectonic information for the geologic structure research and the petroleum resources exploration.
    STUDY ON TIMELAPSE SEISMIC AVO OF THIN INTERBEDed LAYER UNCONSOLIDATED SANDSTONE ESERVOIR
    Zhang Jin-miao; ZHAO Wei; LI Jing-ye
    2007, 29(3):  7-11.  DOI: 10.3863/j.issn.1000-2634.2007.03.003
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    According to the characters of thin interbeded layer unconsolidated reservoirs, a new method based on the anisotropic medium theory is presented for timelapse seismic AVO analysis. By means of welllog data and rock physical data measured in laboratory, the proper porous unconsolidated rock physical model for objective oilfield has been determined, and with a moving average procedure the Backus parameters are calculated, then the rock elastic parameters are calculated and the variation of Thomsen parameters are analyzed. Finally with log data, the angle gathers are synthesized to analyze timelapse seismic AVO responses versus the variation of oil saturation and pressure of the oil reservoir. The simulation data show that the timelapse AVO response of the thin interbeded layer unconsolidated sandstone is sensitive to the effective pressure change of reservoir, and when oil saturation and pressure change, the timelapse AVO response rules of PP wave and PS wave are different. The study in this paper shows that seismic simulation is an effective method and an important tool in studying timelapse seismic feasibility and in distinguishing the variation of effective pressure and oil saturation of reservoir.
    THE IDENTIFICATION OF THE BAIYUN DEEPWATER FAN AND THE KEY FACTORS OF PETROLEUM ACCUMULATION IN PEARL RIVER MOUTH BASIN
    WANG Cun-wu CHEN Hong-han CHEN Shang-ming et al.
    2007, 29(3):  12-16.  DOI: 10.3863/j.issn.1000-2634.2007.03.004
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    The deepwater fan systems contain abundant petroleum and it becomes hot point field in petroleum explorations. Based on the sequence stratigraphy theory, a great variety of the sequence interfaces are identified, furthermore, great deals of deepwater fans are discovered. They are composed of basin floor fans, slope fans, lowstand wedges and downcut channels existing on the Baiyun Sag of the Pearl River Mouth Basin. The basin floor fans and the slope fans developed during several periods overlap each other in vertical, distribute lobately and horizontally, and connecte with downcut channels. On the basis of investigation, the main accumulation controlling factors of the Baiyun Deepwater Fan include: (1) The conducting frameworks, which are composed of faults, continue distribution sandstones, unconformable surface and diapiric zone, connecte the source rock and the deepwater fans and are the key factors of petroleum accumulation; (2) The drive power of oil and gas migration. Based on the basin modeling, there are three circles of strata pressure during the basin evolution. The accumulation and release of overpressure are important for the hydrocarbon expelling from source rock to deep water fans.
    SEISM WAVELET EXTRACTION BASEd ON PHASE SCAN
    LI Da-wei YIN Cheng ZHAO Wei-kun et al.
    2007, 29(3):  17-19.  DOI: 10.3863/j.issn.1000-2634.2007.03.005
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    Take consistent phase supposition as foundation, changes the object function value is changed through computing the signal phase to scann the phase of seismic record, the approach to the wavelet real shape constistent phase value sought, and the phase and the recorded amplitude spectrum synthesis seismic wavelet used, wavelet extraction realized. On the basis of common object function, new object function which more sensitive to the signal phase characteristic is added. And the way that multiobjective union scanning is applied to seek for statistical average , make wavelet phase characteristic more accurately and really, improve antiinterference ability at the same time.The practical value of method has been proved by estimating wavelet from practical data and deconvolution.

    A COMPARISON OF THE FAULT GROWTH INDEX WITH FAULT THROW
    CHENGang;DAI Jun-sheng;YE Xing-shu;et al.
    2007, 29(3):  20-23.  DOI: 10.3863/j.issn.1000-2634.2007.03.006
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    By comparing fault growth index with fault throw analysis, their hypothesis conditions of application, application range, as well as virtue and defect of fault activity intensity research are analyzed, it is recognized, on the basis of accurate stratigraphic correlation, the fault growth index demands that there is consistent depositional velocity on different part in a depression and no depositional break on the both sides of a fault, fault throw analysis is based on the hypothesis that there is, on the both sides, consistent erosion sediment thickness at eroded area, and that it is not necessary to consider depositional break. it is proved that growth index and fault throw can be used to research the active intensity and active history of inversion faults and growth faults in compressional basins and fault basins in some extent. But the fault throw is more intuitionistic and reliable when it is used to analyze the active intensity of growth faults especially those growth faults which are absence of the upthrow sides stratum and have relative evolution differential. Comparative study of different geochronological methods can give more valuable information of evolution and activity of the faults of the same area.

    PREDICTION OF RESERVOIR PRODUCTIVITY BY SUPPORT VECTOR MACHINE
    ZHANG Feng ZHANG Xing ZHANG Le et al.
    2007, 29(3):  24-27.  DOI: 10.3863/j.issn.1000-2634.2007.03.007
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    Support vector machine method is based on the principle of structural risk minimization, and suitable for small samples, nonlinearity and local minimun by Kernel function processing technology, it overcomes the limitation of conventional statistical method, avoids dimentionality disaster, compromises the commonality and popurization of the model on the basis of limited samples and solves the problems of learning performance and popularization effectively with higher prediction accuracy. In practical production, there are a lots factors influncing reservoir productivity, and the factors impact each other. In view of comprehensively considering formation factors, well logging productivity prediction parameters are sorted out, the productivity is predicted by support vector machine, the prediction result is correlated and compareed with the result from multi- regression and BP neural network processing. Practice suggests that the support vector machine is better than the latter two methods and is worthyto be popularized.
    THERMAL EVOLUTION OF SOURCE ROCKS INYANCHANG FORMATION, XIFENG AREA,EAST GANSU PROVINCE
    JI Li-ming;LI Lin-tao;WU Tao;
    2007, 29(3):  28-31.  DOI: 10.3863/j.issn.1000-2634.2007.03.008
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    In order to comprehensively reveal the hydrocarbon generation and expulsion ability of source rocks of the Yanchang Formation in Xifeng area, Southwestern Ordos Basin, the authors investigates the maturity degree of source rocks in the Member 8 and 7 of Yanchang Formation which are closely related to the reservoir. pyrolysis analysis, dissolvable organic matter analysis, vitrinite reflectance of kerogen and biomarker parameter are applied in the research. The peak temperatures of Rock-Eval pyrolysis, conversion rates of bitumen and hydrocarbon, Ro values, OEP values, sterane parameter C29ααα-20S/(20S+20R) and hopane parameter C31αβ-22S/(22S+22R) all indicate that the source rocks in Member 8 and 7 are in the mature stage of organic matter and have reached the peak of hydrocarbon generation. Therefore the source rocks have provided with advantageous conditions to generating and expulsion of hydrocarbon. Although the structure position and buried depth of strata of different wells in Xifeng area are difference at present, the source rocks in Member 8 and 7 of Yanchang Formation have identical thermal evolution because of the similar subsidence history and thermal history. The study provides the basic information for wholly revealing the generating and expulsing ability of the source rocks in the formation.
    RESERVOIR SANDBODY ARCHITECTURAL STRUCTURE OF SHENGTUO OIL FIELD
    HUANG Wen-ke DAI Jun-sheng DOU Zhi-lin et al
    2007, 29(3):  32-35.  DOI: 10.3863/j.issn.1000-2634.2007.03.009
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    Miall architectural structure analysis is applied to study the reservoir architecture structure of the subbed of Es234 of Shengtuo oil field. Thirteen types of lithofacies are distinguished through core observation. Based on the observation, correlation of connectingwell sections and recognizition of well logging curves, with the conception of stratification, six scales of bounding interfaces are defined. Based on the recognization of lithofacies and the classification of sequences, seven kinds of structures are identified, and they are channel sediments(CH), channel retention sediments(CHL), channel bar(CB), fallsiltseam(FS), natural levee(LV), crevassesplay (CS), Overbank fine sediments(OF). And finally, the planar and sectional assemblage models of architecture structure of 34 sand body are established. Channel filling(CH) and channel bar (CB)are the main architectural elements in the plane and three hierarchies are divided in the section.
    THE REMAINING OIL FORMED BY WATER BREAKTHROUGH IN FRACTURES
    WU You-jia LI Jian ZHAO Ming et al.
    2007, 29(3):  36-38.  DOI: 10.3863/j.issn.1000-2634.2007.03.010
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    REMAINING OIL DISTRIBUTION AND THE DEVELOPMENT STRATEGY OF MAIN UNITY BLOCK IN SUDAN
    LIU Yang SHEN Ping-ping; LIU Chun-ze et al
    2007, 29(3):  39-42.  DOI: 10.3863/j.issn.1000-2634.2007.03.011
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    Study on distribution of remaining oil in target block is conducted by using Eclipse software for improving water flooding efficiency. Results show that distribution of remaining oil is affected by different factors during different development stage, it is affected mainly by difference of formation physical property during expansion driving phase and by formation inhomogeneity and well spacing pattern during water flooding phase. Present remaining oil of this block mainly distributes in the areas with lower permeability, imperfect flooding pattern or blocks in oil layer and non-essential streamline region of injection well. Development effect of Main Unity reservoirs can be effectively improved by locally lowering down well space, adjusting layer system and water flooding pressure maintenance. Development mode of perimeter waterflooding is superior to intracontour waterflooding in dealing with fault block reservoirs like Main Ghazal which has well physical properties, good communication and suitable size. Next stage optimized development plan of Main Unity reservoir is proposed and recovery will be 4.73% higher contrasting to current well spacing pattern.
    THE PHYSICAL PROPERTIES AND THE INFLUENTIAL FACTORS OF THE CRUDE OIL IN SANTANGHU BASIN
    GAO Gang LIANG Hao YANG Shu-ya et al.
    2007, 29(3):  43-45.  DOI: 10.3863/j.issn.1000-2634.2007.03.012
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    Based on the research on physical properties and the distribution characteristics of crude oil in Santanghu basin, combining the geological condition, the authors analyze the influencial factors of the physical properties of crude oil. It is shown that physical characteristics of crude oil depend not only on group compositions, but also on maturity, burial depth, preservation condition and compositional gravity differentiation. The factors of influence on density include content of saturation hydrocarbon, arocomatic hydrocarbon, resin, asphaltene and wax. Viscosity mainly depends on content of saturation hydrocarbon, arocomatic hydrocarbon and resin, not on asphltene and wax. For the change of physical properties of the crude oil in Lucaogou Formation, Niujuanhu oil field, the bigger its depth is, the higher its viscosity, which are different from other area and stratum, and it is the result of gravity differentiation of different hydrocarbons. The physical properties variation of crude oil in other area decrease as its depth increasing, mainly related to preservation condition, water leaching and oxidation, the recognition is of an importance to other areas in the research on physical property distribution characyeristics of crude oil.
    INTERACTIVE INTERPRETATION OF CORE SCANNING TECHNIQUE AND IMAGING LOGGING DATA
    FAN Xiang-yu; XIA Hong-quan ZHEN Lei-qing et al.
    2007, 29(3):  46-48.  DOI: 10.3863/j.issn.1000-2634.2007.03.013
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    Although imagery logging plays an important role in structural analysis, lithological description, reservoir evaluation and sedimentary facies study, data obtained from imaging logging may often be interpreted in different ways. Therefore, core scanning images need to be applied to calibrate imaging logging data, in order to be more accurate in logging interpretation, a program has been developed for interactive interpreting core scanning and image data by using VC++6.0 which enables engineers to successfully interpret geological information, core data, core photos and imaging logging statistics interactively. Procession of a vast amount of data and utility in the field demonstrate, by adopting this method, data in core data bank can not only be utilized more fully, also logging interpretation can become faster and more reliable. Interactive interpretation of core scanning technique and imaging logging data will play a more and more important role in oil field exploration and development.
    石油与天然气工程
    DESIGN OF DATA ACQUISITION SYSTEM OF MEASURING DRILLING ENGINEERING PARAMETER BASED ON STAIN MEASURING TECHNOLOGY
    HU Ze CHEN Ping HUANG Wan-zhi et al.
    2007, 29(3):  49-52.  DOI: 10.3863/j.issn.1000-2634.2007.03.014
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    The authors of the paper designe a data acquisition system of drilling engineering parameter while drilling based on strain measuring technology. By means of four strain gauge fullbridge mode, drilling engineering parameters, such as drilling pressure, torque, side pressure and annular pressure etc. can be measured while drilling. The data acquisition system adoptes ADμC8xx series single chip as main controller, in addition, peripheral signal processing circuit, memory module, communication module and power supply module and so on are designed, too. The experimental result suggests it is feasible that this data acquisition system is applied to measure well drilling engineering parameters.
    FUZZY COMPREHENSIVE EVALUATION OF STEAM FLOODING SORTING HEAVY OIL RESERVOIR
    GAO Hai-hong; CHENG Lin-song; ZHAO Mei et al.
    2007, 29(3):  53-56.  DOI: 10.3863/j.issn.1000-2634.2007.03.015
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    Steam flooding significantly improves the heavy oil reservoirs recovery, however, it is also a costy system engineering. Before carring out steam flooding to develop reservoir, sorting steam flooding applicability can increase the success and economic benefit, and can effectively avoid investment risk. Based on the reviewed steam flooding sorting criteria, ten reservoir parameters have been selected as evaluation index which can be quantified by the according membership function, the simple fuzzy comprehensive evaluation model of steam flooding sorting has been built with introduction of weight fuzzy evaluation computational model. The case history shows the feasibility and comprehensiveness of this method. The model overcomes the shortcoming of the single element limitation evaluation of sorting criteria and can be widely used in the steam flooding sorting of heavy oil reservoir.
    TRIAXIAL CREEP TEST OF MUDSTONE AND the RESULT APPLICATION
    LI Rong MENG Ying-feng LUO Yong et al.
    2007, 29(3):  57-59.  DOI: 10.3863/j.issn.1000-2634.2007.03.016
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    In the drilling operation, wellbore stability mostly occurs in the mudstone and shale section. The rock mechanics parameters obtained from the test can be used to well carry on the wellbore stability and the mechanical properties analysis, the mudstone triaxial creep test carried on the triaxial rock mechanics testing aircraft is introduced in detail, according to the result of the test, by applying the nonlinear regression method, the constitutive equation and its creep coefficient description distortion is obtained, the creep rule and the creep pressure of mudstone is analyzed to provide the scientific basis. Meanwhile, in the view of the calculation formula of safe drilling fluid density deadline required by different undergauge rate, corresponding drilling fluid density is calculated.

    THE PRODUCTIVITY EVALUATION MODEL OF THE STEPPED HORIZONTAL WELL IN THIN INTERBEDED RESERVOIRS
    HUANG Shi-jun CHENG Lin-song ZHAO Feng-lan et al.
    2007, 29(3):  60-65.  DOI: 10.3863/j.issn.1000-2634.2007.03.017
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    On the basis of the potential superposition, a coupling flow model of the pay zones in stepped hprizontal wells in thin interbeded reservoirs is estabished, and in the model, the interference between reservoir flowing through porous media of pay zones and pipe flowing coupling and branching in well bore is considered, the productivity evaluation method for stepped horizontal wells considering coupling flowing of pay zones is put forward. The dual stepped horizontal well productivity calculated with the established coupling model is 64.26 m3/d, comparing with 60.19 m3/d of the practical productivity of thewell, the calculation error of the coupling model is 6.76%, and the error calculated with horizontal well solution equation is as high as 26.71%.

    THE APPLICABILITY OF RATE DECLINE AUTOMATIC MATCHING METHOD
    LIANG Bin ZHANG Lie-hui LI Min et al.
    2007, 29(3):  66-70.  DOI: 10.3863/j.issn.1000-2634.2007.03.018
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    Based on rate decline automatic matching model(LM model in short) and combined with the singlewell numerical simulator, the applicability of LM's automatic matching model on analyzing the gaswell decline of the normal pressure gas reservoir is investigated. The research shows that the LM model can be applied to analyze the gaswell rate decline for any boundaryshape gas reservoir, however, as for the lowpermeability gas reservoir, the calculation results take on great errors. To improve LM model predication accuracy, a way of acquiring the formation parameters is presented in the paper by firstly removing the unsteady production data and then, following the LM automatic matching model to get formation parameters. Besides,the authors put forward a touchstone to justify the calculation results.
    ACCUMULATION TYPES OF YAN 107 CONGLOMERATE RESERVOIRS AND THE INFLUNCE ON WATER INJECTION PRODUCTION
    ZHAO Shu-huai DU Zhi-min wu Cui-yan;et al.
    2007, 29(3):  71-74.  DOI: 10.3863/j.issn.1000-2634.2007.03.019
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    the reservoir lithology of Yan 107 thick conglomerate reservoir is dominated by dolostone. At the early stage of development, on the basis of the recognition of the pore spaces being pores, the development plan was schemed according to the development model of common sandstone and conglomerate reservoirs, but, after two years development and under the condition of less than 5% recovery, the productivity declined from 150 t/d at beginning down to 20 t/d, comprehensive water cut was as high as 80%. Under the condition of no core data and the logging series being not suitable for fracture study, started from analyzing the contradiction exposed in development, by means of wall coring , pressure buildup testing, the reservoir lithology difference and accumulation relations between the types, as well as the application of the indentification of accumulation types on the development of Yan 107 conglomerate reservoirs, are discussed in detail.
    THE WELL TEST EXPLARATION RELIABILITY EVALUATED BY PRESSURE DISTRIBUTION
    TANG Sheng-lai WANG Nu-tao SHENG Yong-wei et al.
    2007, 29(3):  75-77.  DOI: 10.3863/j.issn.1000-2634.2007.03.020
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    Because of the multi solution of well test analysis, and no special technique method of reliability evaluation of explaration bresult, pressure distribution analysis is used to evaluate the explaration result obtained form well test, the data from the explaration is dipicted into the inter well pressure distribution map between producers and injectors, and furtherly,the map is employed to check the accuracy shch parameters as permeability and so on, the problem of well test esplaration multi soluaiton is overcome through adajusting pressure distribution. The formation parameters can be obtained more precissily, the reliability of well test explaration can be daviced.
    THE MODELLING OF WELLBORE PRESSURE PERFORMANCE DURING EXTREME OVERBALANCE PERFORATION
    LI Hai-tao WANG Yong-qing
    2007, 29(3):  78-80.  DOI: 10.3863/j.issn.1000-2634.2007.03.021
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    Exetreme overbalanced perforation developed in 1990's is very suitable for wells in carbonate or hihgly heterogeneous or heavy damaged gas formations and has been widly and well applicated because of its dramatic and costeffective improvement in initial well productivity. In this paper, the principle and procedures of exetreme overbalanced perforation operations have been clearly addressed based on the analysis of technical characteristics. The wellbore performace equations have been derived according to energy conservation law and gasliquid interface moving feature to model the wellbore pressure performance and the method of solving this problem has been carried out accordingly, it is shown that the wellbore pressure performance results are quite reasonable which provides basic information for modeling of fracture propagation and productivity prediction. The effect of wellhead pressure and gas/liquid column height on wellbore pressure performance have also been analysed, thus let the optimization of EOP job design be available.
    THE APPLICATION OF LEAKING IDENTIFICATION TECHNOLOGY WITH FLOWRATOR ON PUCHENG OIL FIELD
    LIU Di-yuan LI Zhen-ti WANG Wei et al.
    2007, 29(3):  81-84.  DOI: 10.3863/j.issn.1000-2634.2007.03.022
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    At Pucheng oil field, Long time exploitation and heavy corrosion of downhole casing make serious comprehensive circulation loss. Because conventional leaking identification technologies are hard to identify leaking location and leaking quantity of wells, it is necessary to explore new one. In this paper, main equipments and leaking identification explanation methods of leaking identification with flowrator are introduced. Based on actual condition of Pucheng oil field with high temperature, corresponding improving measures are proposed to improve range of applicability of well temperature of leaking identification equipments. The application of leaking identification technology with flowrator on 3182 Pu 53 block, Pucheng oil field attains satisfactory effect. Nowadays, this technology has been widely used in Pucheng oil field.
    APPLICATION OF THE ARTIFICIAL EARTHQUAKE OIL DISPLACEMENT TECHNOLOGY ON COMPLICATED FAULT BLOCK HEAVY OIL RESERVOIRS
    WANG He-qiang; LI Zhi-jun ZHANG Li-hui et al.
    2007, 29(3):  85-87.  DOI: 10.3863/j.issn.1000-2634.2007.03.023
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    The south oil region of Dagang oil field is characterized by complicated fault block, multilayer system and heavy oil reservoirs. The size of the fault block reservoir is small with serious areal heterogeneity, interlamination heterogeneity and intralamination heterogeneity. Most of these reservoirs are in the high water cut stage and the waterflood feefct is becoming worse and worse, the artificial earthquake technology is applied to produce ultrasonic that it can decrease crude oil viscosity and improve the crude oil flow ability. The technology used in the Wangguantun and Zaoyuan oil field acquired the marked effectiveness, which improves the waterflood eefect in the high water cut stage, and slow down the ascending water containing speed. By the six times experimentation with four wells , the summation of crude output is 8499t and the input/output ratio is 1∶9.3. The downhole artificial earthquake oil flooding technology supplies a kind of new technology for the complicated fault block, heavy oil reservoirs and high water cut reservoir development. The technology has many advantages, such as wide operation area,  small degree of damage to reservoir and the low input/output ratio. The artificial earthquake oil flooding technology has a good future for oil production.
    油气化学工程与化工
    EXPERIMENT ON ABIOTIC FACTOR OXYGEN CONSUMPTION OF THE RESERVOIR
    KONG Xiang-ping WANG Xiu-lin LUAN Chuan-zhen et al.
    2007, 29(3):  88-90.  DOI: 10.3863/j.issn.1000-2634.2007.03.024
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    To aerobic microbial enhanced oil recovery, determining the amount of oxygen injection is a problem urgently to be solved. Oxygen consumption of crude oil, injected water and produced water of one block in Shengli Oilfield is probed by analyzing changes of gas composition before and after the reaction in highpressure oxidation tubes. The results suggeste that abiotic oxygen consumption of reservoirs at 70℃ is mainly the lowtemperature oxidation of crude oil. The oxygen consumption per gram crude oil is 20.15 mg after 12d oxidation reaction at 6.3MPa, 70℃ and 3.29% consumed oxygen formes CO2. The oxygen consumption per liter injected water is 11.12mg after 12 d oxidation reaction when the ratio of high pressure air to injected water is 1∶23 at 5.8MPa, 70℃, and 95.00% consumed oxygen formes CO2. The oxygen consumption per liter produced water is 3.98mg after 12d oxidation reaction when the ratio of high pressure air to produced water is 1∶23 at 6.3MPa, 70℃, and almost all the consumed oxygen formes CO2. The results will provide theoretical basis for microbial enhanced oil recovery by adopting airassistant technique.
    THE NEW OILFLOODING FOAM SYSTEM OF TEMPREATURERESISTANCE AND HIGH SALTRESISTANCE
    DIAO Su PU Wan-fen HUANG Yu-zhong et al.
    2007, 29(3):  91-93.  DOI: 10.3863/j.issn.1000-2634.2007.03.025
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    The foamer XN with better saltresistance property is taken to correlate the foambility of the three types of foam stabilizer HXYP, YPA, PAM with better saltresistance property seprately and in pair under the conditions of 80℃ and the salility of 20.3×104 gm/L. The experimental result shows, under the condition of same toatl concentration of foamer and stablizer, the single stablizer system and the composite foam stablizer system of YPA and PAM can not produce steady foam, and the composite foam stablizer systems of HXYP, YAP and PAM are of best saltresistance property when the composite ratio is 9∶1. Optimization of the total amount of foamer and stablizer is done to the two types of composite foam stablizer systems, two types of receipts of foam systems are determined under the condition ,(1) stablizer:HXYP1800 mg/l+YAP200mg/L, foamer: 2000mg/L; (2) stablizer:HXYP1800mg/l+PAM200mg/L,foamer:XN2000mg/L. The foam quality and dispersation of the two systems are 68%, 59.7min and 67.7%, 64.1min respectively, and the property of high saltresistance is excellent.
    ALTERNATE INJECTION FOAM COMBINATION FLOODING EXPERIMENT
    ZHOU Guo-hua CAO Xu-long WANG Qi-wei et al.
    2007, 29(3):  94-96.  DOI: 10.3863/j.issn.1000-2634.2007.03.026
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    In this paper the character of polym ersurfactant foam combination flooding of alternate injection is studied with physical model test under the reservoir condition of central part of Block 2 in central Gudao Oilfield. The long slim tube test shows that at low gas liquid ratio, the blocking pressure difference between inlet and outlet of slim tube increases more slowly and the bigger alternate slug is, the worse the block effect. The oil displacement test on heterogeneous porous model shows that EOR of polymersurfactant foam combination flooding mainly depended on increasing sweep volume, at the same injection volume, its blocking ability is twice bigger than polymer flooding.
    THE EXPERIMENTAL STUDY ON IPN GEL PARTICLES BLANKINGOFF TO FRACTURED CORE
    XIE Quan PU Wan-feng DING Xun-yi et al.
    2007, 29(3):  97-99.  DOI: 10.3863/j.issn.1000-2634.2007.03.027
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    The authors of the paper investigate IPN,606,612 precross linked gel particles' distribution of blank off coefficient in fractured core,meanwhile, study these gel particles' blank offrate, reserve rate and the gradient of particles' break through pressure in the fractured core after 4, 10, 30, and 180 hours respectively. The results of the experiment show that gel particles' distribution of blank off coefficient and their dynamic law in the fractured core can be used to evaluate the particles' migration law and profile control property in the fractured core. It is also identified IPN gel particles illustrate a good blankoff effect. When IPV water is injeceted, the blank off coeficient of long fractured core is quite steady, which is apparentely higher than that of 606 and 612 gel particals. The blank off rate in the fractured core after 180 days can reach 90.3 percent and the reserve rate of blankoff water efficiency 99 percent. This kind of gel can be used as a deep profile control agent in the channeling reservoirs.
    A PROBE ON THE RELATED PROBLEMS OF LAYRING POLYMER INJECTION
    CHEN Zhang-qing LI Lin QIAN Yu et al.
    2007, 29(3):  100-103.  DOI: 10.3863/j.issn.1000-2634.2007.03.028
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    The layring polymer injection is the one of the effecyive ways enhancing oil recovery. At the present, thereare 302 wells in central Saertu development area in Daqing oilfield having been practiced layring injection, which take up 37.6% of total wells, the way has played a unreplacible role in polymer flooding recovery. But impacted by the multiple factors such as adaptability of reservoirs and layring injection technique, the way needs furtherly improved in practice. Through the analysis to reservoirs production dynamic situation of layring polymer injection wells in different polymer injection stages, dynamic change and production, the wellselecting rule and layring time of the layring wells are described, the adaptability and the existing problems of layring injection technique analyzed, which offer basis for furtherly improving layring polymer injection technique.
    LAB RESEARCH ON THE TECHNOLOGY FOR DEACIDIFICATION SOLVENT OF THE CRUDE OIL WITH HIGH ACID NUMBER
    TANG Xiao-dong; XIAO Huang-fei CUI Ying-xian et al.
    2007, 29(3):  104-106.  DOI: 10.3863/j.issn.1000-2634.2007.03.029
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    Because of the method of deacidification of the oil fraction can't solve the problem of the equipment corrosion effectively, the technology of deacidification solvent is used to research the deacidification of the crude oil with high acid number in lab. Comparing with the technique of deacidification of alkali washing for the oil fraction, the technology of deacidification solven of the crude oil with high acid numbe can decrease or banish the naphthenic acid corrossion to equipment, it is of the characteristic of small dosage,low wastage of NaOH,small discharge capacity no emulsification, good adaptability and effect of deacidification ,the rate of deacidification reaches 95%. After the crude oil with acid number of 2.07mgKOH/g is deacidized,the acid number of it's distillation of 180~350℃ is smaller than 10 mgKOH/100ml, so the distillated diesel oil does not need deacidification. The new technique that combinates the desalting with deacidificating is put forward, it is pointed out that the existing equipment can be used to save cost.

    EXPERIMENTAL STUDY ON WAX CRYSTALLIZATION AND EMULSIFICATION OF SHJ CRUDE OIL, BOZHONG OIL BLOCK
    XIONG Xiao-qin JING Jia-qiang JING Ling -Ji et al.
    2007, 29(3):  107-110.  DOI: 10.3863/j.issn.1000-2634.2007.03.030
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    In view of the hiddentrouble of SHJ(Sha Hejie)crude oil transported safely through offshore pipeline in Bozhong oil Block, the wax crystallization of SHJ crude oil is observed and analyzed by using an image analysis system and necceary programin water bath at the temperature range from 65℃ to 20℃, and then its wax precipitation point and the peak temperature are determined. The rheological and emulsified properties of SHJ crude oil and its emulsions formed with the produced water of a nearby water source well are measured and evaluated by using a HAAKE RS600 rheometer. The experimental results indicate that the wax appearance point and viscosityabnormal point of the oil is 51℃ and 30℃ respectively, and its wax precipitation peak temperature is between 35℃ and 20℃. While the amount of added water is below 70%, the mixture of oil and water, stirred at 700-800 r/min within 2 hours and cooled naturally from 80℃ at 25℃ room temperature, can be emulsified completely. The inverted point of the emulsion is about 70%. The experimental methods can provide the related research for a reference and the results provide a guide to the safe operation of SHJ crude oil transported by adding some high temperature water.
    石油机械工程及其它
    APPLICATION OF THE VIBRATORY STRESS RELIEF TECHNOLOGY IN PETROLEUM MACHINE MANUFACTURING
    ZHAO Xin LI Bin .
    2007, 29(3):  111-114.  DOI: 10.3863/j.issn.1000-2634.2007.03.031
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    In the manufacturing process, many of the welding, forging and casting pieces require processing of stressrelief, that is, heat stress relief treatment in the oil machinery, its main purpose is to reduce the residual stress and decrease deformation and cracking of the workpiece. A series of the experiments and researches are conducted on the rigs which are against derrick own planes, the base of derrick ,engine room and linkage plane, and other heavy welding parts in the manufacturing process, the vibratory stress relief technique is applied to the research of the Daqing rig gear linkage II 130, the reasonable parameters determined ,and a reasonable choice given about the exciting force, frequency and time, supporting point ,excitation point and pickup point , satisfactory results achieved in the practical application. It is of great significance to the petroleum machinery manufacturing.
    MECHANICAL PERFORMANCE RESEEARCH ON COILED TUBING
    ZHAO GUANG-HUI LIANG Zheng.
    2007, 29(3):  115-117.  DOI: 10.3863/j.issn.1000-2634.2007.03.031
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    Coiled tubing (CT), because of the materials which are different from conventional drilling pipe and tube, its operation technique and the facilities, is unique, and fast development of CT has taken place in drilling and production. Meanwhile, the mechanical researche on operating process of CT are also following quickly. Studies on CT, when it is wrapped on the reel, belongs to the area of large elasticplastic stretch bending deformation. By means of general equation of dynamics in the form of virtual work, the torsion torque needed by the reel to wrap CT and the actual output power of hydraulic motor can be derived out. It's found that the torsion torque exerted on the reel is almost linear to the axial stretch of the CT. Mechanical behaviors of CT are analyzed by elasticplastic theory when the CT is wrapped on the reel and then unloaded. It is demonstrated that reversed buckling will not happen. After unloading and resiling, the curvature radius of CT decreases monotonously along with stretch increasing. As a result, stretch is helpful to reducing resilience. It is suggested that the bending moment should also be remained in order to avoid CT resiling and disastrous mess after the CT is wrapped on the reel.
    FINITE ELEMENT ANALYSIS AND APPLICATION ON THE STABILITY OF BOTTOMHOLE ASSEMBLY
    KUANG Yu-chun JIANG Jian-ning SHEN Jie et al.
    2007, 29(3):  118-121.  DOI: 10.3863/j.issn.1000-2634.2007.03.032
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    The critical buckling load is influenced by the pattern of bottomhole assembly directly. In this paper, an analysis method of eigenvalue buckling of bottomhole assembly is proposed based on finite element analysis, and some cases are analyzedand calculated. The computational result demonstrates the critical buckling load will increase as optimal spacing of multiple stabilizers, and the deviation control and penetration rate increasing will be realized, a theoretical basis is provided for the technology of deviation control and penetration rate increasing based on nonlinear dynamics.
    OPTIMAL DESIGN FOR STEPSTRESS ACCELERATED LIFE TEST WITH CENSORING II
    WANG Yu
    2007, 29(3):  122-125.  DOI: 10.3863/j.issn.1000-2634.2007.03.033
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    In order to evaluate the reliability index of the longlife products in a short period of time, constantstress, progressive stress and stepstress accelerated life tests are usually used to speed up failure products and estimate their indicators. In view of stepstress accelerated life test, in multiparameter accelerated life equation, aiming at the minimun sumation of every failure mechanism and the variance of the MLE, optimal design model of Type II stepstress accelerated life tests, through the theoretical derivations, the corresponding optimal design plan is obtained. The main conclusion is that for a stepstress test which satisfies the condition of intercept data is monotonic.The optimal plan making minimun of the variance of the MLE is: The intercept data is equal to every stress.The results are the expansion and extension of simple stepstress accelerated life tests, which would guide and organize experiments, improve the accuracy of evaluation findings. It is of theoretical and practical value.
    A PROBE INPIPES' PRESSURE REVERSAL
    WANG Ming-chun LIAN Zhang-hua DAI Juan et al.
    2007, 29(3):  126-129.  DOI: 10.3863/j.issn.1000-2634.2007.03.034
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    There are great deference between the short cracks' and the long cracks' propagation, the short cracks' propagation are visible as the behavior of cracks in group with the action of stress, there are not only propagation of cracks, but interaction between the neighbor cracks and the combination in neighbor cracks on the basis of propagation, which results in the formation of leading cracks, but the long cracks' propagation performance as the individual behavior of crack. The cracks and defects that are caused during the process of pipe making, transportation and laying are the reason of "Pressure Reversal", and the cracks' propagation and the combination lead to pipe "Pressure Reversal". The "Pressure Reversal" is analyzed with the theory of cracks propagation of fracture mechanics and corresponding protection measures put forward.
    THE WEARING EXPERIMENT OF THE EQUAL AND CHANGING DIAMETER FLOATINGRING SLIDING BEARING
    YANG Qi-ming RAO Ji-yang.
    2007, 29(3):  130-132.  DOI: 10.3863/j.issn.1000-2634.2007.03.035
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    Through the wearing experimentof theequal and changing diameter floatingring sliding bearing under the same condition,the mulitifactor experimental analysis is conducted with changing such parameters as operational ratory speed, inner and outer clearance, the ratio of inner and outer clearance, the wearing amount under the condition of equal pressure and the other factors. It is revealed the no matter how the rotary speeed changes, to change diameter bearing, the avearage wearing amount is relatively small when the inner clearance is bigger and the outer clearance smaller, but to the equal diameter bearing, the wearing amount is smaller when the clearance smaller.The general tendency is the wearing amount of the changing diameter beaRIng is much less than that of the equal diameter bearing,based on the result, it is concluded that the changing diameter beaRing is easy to form a dynamic pressure lubricating film, and its wearing amount and the friction power loss are much less than the equal diameter bearing's, which implies the load capacity of the changing diameter floatingring bearing is greater than that of equal diameter floatingring bearing, the ratio of the inner and outer clearance of floatingring bearing should be between 1.17-1.20, as the increase of rotary speed, the operating stability of the bearing can be improved and the wearing decreased.
    3D KINETIC EMULATION & ANALYSIS OF TRICONE ROCK BIT
    WU Ze-bing GAO Xing ZHANG Jian.
    2007, 29(3):  133-135.  DOI: 10.3863/j.issn.1000-2634.2007.03.036
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    Some reasonable connects are used to assemble these parts to create the 3D solid models of the cones, claws, and teeth with Pro/ENGINEER. In the Mechanism module of PRO/ ENGINEER, loads, constrains and boundary conditions fixed, the initial conditions are determined to simulate drilling bit operation (including bit and the teeth rotary movement,up and down movement of the bit). Some analysis definitions in the initial condition are created, and the displacement, velocity, acceleration and space movement trajectories of a given point on teeth are measured under this definition. Finally the data from characteristic points on the back cone teeth, gauge teeth, and interior teeth are analyzed. All different parameters combination are compared. The movement states of different rows of teeth are obtained under given conditions. The analytical results provide a wealth of information for geometry and performance design of tricone rock bits.
    THE FLUID FIELD OF THE INTERNAL DRILLING FLUID CENTRIFUGE
    LIU Hong-bin XIA Nan ZHANG Ming-hong et al.
    2007, 29(3):  136-138.  DOI: 10.3863/j.issn.1000-2634.2007.03.037
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    As the new drilling technology and technique develop, and the various Shale Shakers come into use, the centrifuge in solids control system makes a higher claim for the operation capability and range; It's difficult to improve the traditional centrifuge because the limitation of technology and structural character itself; the authors of the paper analyze the restrained factor that the processing capacity of the drilling fluid centrifuge can't be raised currently both home and abroad, and presente the operation principle and characteristics of a certern new centrifuge, it is recognized the technical innovation of improving centrifuge processing capacity is scattering feeding, two times acceleration, feeding from the outlet and theframeshaped crew structure. In the meantime, the authors study the internal fluid field in the centrifuge, give out the mathematics model based on the NS equation, redefine a boundary condition according to the work characteristics and get the calculating method for processing capacity. It proves the flexibility of the model through the contrasting data between the calculation and the insitu test.
    THE APPLICATION OF REVERSE ENGINEERING TECHNOLOGY IN RESEARCH AND MANUFACTURING IN 1400 FRACTURING PUMP
    JIANG Fa-guang LIANG Zheng ZHONG Gong-xiang et al.
    2007, 29(3):  139-141.  DOI: 10.3863/j.issn.1000-2634.2007.03.038
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    After being imported and used 10 odds years, HQ 1400 fracturing pump has appeared a series of problems, such as the wreck and invalidation of the common parts at the power end. Based on the Reverse Engineering Technology, particula study, CAD modeling, material analysis, finite element analysis and research, the new 1400 fracturing pump is designed as five cylinder, singleaction, reciprocating type, slidercrank mechanism and overtype worm gear at last. A new 1400 Fracturing Pump is successfully developed through systemical theory study and structure analysis of HQ 1400 Fracturing Pump. This paper offers a kind of effective method to study other similar products.
    THE MODEL OF INTEGRATED TECHNIQUE OPTIMIZATION FOR GREEN MANUFACTURING
    ZHENG Hua-lin
    2007, 29(3):  142-145.  DOI: 10.3863/j.issn.1000-2634.2007.03.039
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    In order to improve the execution of technique planning in practical production and to reduce the resource consumption and negtive effects on environment during the manufacturing, a concurrent integration model of CAPP/PPC for Green Manufacturing is put forward in this paper which is based on dynamic technique and centered on manufacturing resources, then authors of the paper establishe the dynamic integrated technique optimization model with the optimization objects of cost, due time, resource consumption and effects on environment. The model realizes not only the optimization of technique route, but also the optimization allocation of manufacturing resources. Accordingly it enables to improve the execution of production planning and satisfy the technique planning demand of Green Manufacturing.
    INFLUENCE OF SHOCK ABSORBER INSTALLATION POSITION ON THE DRILL STRING LONGITUDINAL VIBRATION
    ZHANG Xiao-dong LI Jun LIANG Hong-jun .
    2007, 29(3):  146-149.  DOI: 10.3863/j.issn.1000-2634.2007.03.040
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    6 petroleum shock absorber breaking accidents happened from 2004 to the beginning of the 2005 in Tarim oil field, in which, there were 4 times of flower bond box thread root breaking, 1 cylinder box thread root breaking and 1 mandrel breaking. In view of the above accidents, the authors of the paper establishe the analytical mathematical model of integral drill string longitudinal vibration in which the installation position of the shock absorber is not limited and the length of the drill rod and the drill collar is flexible, figure out the calculation method of the model, draw up the drill string assembly and the well depth used in the calculation, obtain the calculation value by computer simulation at different rotational speeds and different installation positions of the shock absorber. So the authors deduce the conclusion: the different installation positions of the shock absorber on the bit can get different damping effects and variable rock breaking dynamic loads. When the shock absorber is at the optimum installation position which is determined by the damping effect and the rock breaking dynamic load, the shock absorber effect can be enhanced from several to more than 10 times and the ability of rock breaking can be enhanced on the condition that it doesn't add drill pressure. The new drill string assembly with the optimum installation position of shock absorber is successful in the Da Bei 3 well belonging to Tarim oil field, which indicates that the research has wide application prospect.
    APPLICATION OF PSO IN OPTIMAL DESIGN OF HOT OIL PIPELINE
    LI Ke-xing WANG Yu-chun YANG Zhou et al.
    2007, 29(3):  150-153.  DOI: 10.3863/j.issn.1000-2634.2007.03.041
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    The annual throughout is often not equal to the designed annual throughout, it changes randomly in actual operation, optimal square approximation is used to identify the pipeline's designed throughout. Based on it, the authors establishe the optimal designed two level hierarhical model of hot oil pipeline including annual throughout model and optimal parameter model. Combining PSO (Particle Swarm Optimization) and MDRP ( Mixed Discrete Random Programming ) forms the comprehensive PSO MDRP, which can be applied to actualize the whole optimization design of hot oil pipeline. The calculation examples show that PSOMDRP can save more annual expense compared with PSO, MDRP and MDCP (Mixed Discrete Complex Programming)for the same design. It also shows using PSOMDRP improves the design quality.
    EFFECT OF MOLECULE DIFFUSION ON THE PERFORMANCE OF UNDERGROUND GAS STORAGE IN DEPLETED FRACTURED RESERVOIRS
    FU Yu GUO Xiao DU Zhi-min et al.
    2007, 29(3):  154-156.  DOI: 10.3863/j.issn.1000-2634.2007.03.042
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    The flowing characteristics of depleted fractured gas/oil reservoirs are very complex, effect of gas molecule diffusion on the performance of underground gas storage is often neglected in many field applications and theoretical researche. Authors of the paper firstly induce the Fick's First Law, correct molecule diffusion coefficient in porous media and calculate gas molecule diffusion flux rate, the calculated diffusion flux rate is then substituted in Warren-Root dural pore model to develop a new fractured underground gas storage mathematical model, which effectively considers the influence of gas molecule diffusion. The case-analyzing results of the new model show that after 18 years of operation, the cumulative losing free gas quantity in the gas storage with molecule diffusing is 6% more than that without molecule diffusion, while the cumulative oil production with molecule diffusion is 1.35 times more. It proves that the gas molecule diffusion is a key factor of gas lossing in gas storage, and also, is the important machanism of improving oil recovery by gas injection.
    RELIABILITY OF ONLINE CORROSION MONITORING SYSTEM
    XIANG Min LI Chang-jun LIAO Ke-xi et al.
    2007, 29(3):  157-159.  DOI: 10.3863/j.issn.1000-2634.2007.03.043
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    The corrosion is resulting in serious economic loss and casully, the online corrosion monitoring, a new technology continuous ly measuring the speed of corrosion and the parameters related to the speed without impacting the normal operation of the system, is developped quickly. In demestic petrochmical enterprises, research and application of the technology become an important issue. Authors of the paper research the structure characteristic and pattern of two types of online corrosion monitoring systems, introducce three typical reliability models of system, i,e., reliability model of series system, reliability model of parallel system and reliability model of mixed structural system, and the last one is selected to analyze two types of online corrosion monitoring. On the basis of it, the reliabiltiy model of online corrosion monitoring system is established, the model can be used both to forcast the reliability of the standing up system monitoring facilities, andevaluate the reliability of online monitoring system in operation. At last, a case is presented to calculate the reliability, total rate of failure and average working time of some on0line corrosion monitoring systems.
    CLASSIFICATION OF CAPITAL TYPE AND FORECASTING OF INVESTMENT CHANCE FOR INTERNATIONAL OIL COMPANIES
    BO Qi-liang ZHANG Ying-hong GUO Xiao-zhe .
    2007, 29(3):  160-163.  DOI: 10.3863/j.issn.1000-2634.2007.03.044
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    International oil companies have interrelated pluralityization characters, and its every overseas capital section makes up of a profit center with independent operation. Based on the percentage of capital profit in the company yeargross profit and the rising rate of the capital output, the authors of this paper establish capital structure matrix. The matrix can divide oilgas capital into four basic types, according to the every capital influence difference of the capital demand, profit contribution and future development, force cash flow difference among different capital section is required through configuring capital type scientifically to keep continual payoff . On the other hand, the study based on the single capital growing track of capital matrix reveals that oilgas capital usually has four growing track types, different track has different investment chance, then it can be applied in forecasting investment chance, inspecting and managing capital prosecution.
    基础理论
    HYDROPHOBICALLY ASSOCIATING WATERSOLUBLE POLYMER WITH HIGHRATIO INTERMOLECULAR ASSOCIATION
    FENG Ru-sen GUO Yong-jun XUE Xin-sheng et al.
    2007, 29(3):  164-167.  DOI: 10.3863/j.issn.1000-2634.2007.03.045
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    After the studies are conducted and problems existing in applications of hydrophobically associating watersoluble polymers(HAWP) have been discussed, it is concluded that all these problems in different aspects are the result of incorrect molecular design and inexact control during polymerization process. The relationship between hydrophobical interaction and properties of HAWP, as well as effects of temperature and salt on HAWP solution, are studied, a new idea about HAWP molecular design is put forward that intra/intermolecular association can be tuned by rationally choosing spacer and chemical bond between main chain and its hydrophobic contents. This new method is named as HAWP molecular design with highratio intermolecular association. The object of highratio intermolecular association molecular design is to furtherly improve temperature tolerance and salt resistance ability of HAWP and decrease sideeffect of hydrophobic contents as well.
    THE SYNCHRONISM THEORY OF THREE MOTOR SELF-SYNCHRONISM EXCITING ELLIPTICAL MOTION SHAKER
    HOU Yong-jun
    2007, 29(3):  168-172.  DOI: 10.3863/j.issn.1000-2634.2007.03.046
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    A new type of shale shaker is presented,which is excited by three motor self synchronously. With big exciting force and equipped with no mechanical transmission, and low noise, simple structure, convenient production and maintenance, it can be applied on the shaker with big screening area especially. By building the mechanics model of this kind of Shaker,and using the Hamilton principle, the Selfsynchronism qualification and stability condition of the shaker system are built, and the conditions of the system can carry out uniform elliptical motion. Research results show that this kind of shale shaker can synchronously and steadily run when the selfsynchronism qualification and stability condition are satisfied. So it is of bigger theoridical and engineering applying value.
    博导论评
    STUDY ON THE PARTICLE SLIP VELOCITY AND SEPARATING DIAMETER
    LIANGZheng REN Lian-cheng WU Shi-hui .
    2007, 29(3):  173-176.  DOI: 10.3863/j.issn.1000-2634.2007.03.047
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    In this paper, the dynamic forces acting on the particles and the radial movement of particles in hydrcyclone are studied on the basis of experiment and CFD simulation. The study shows that in the radial direction the dynamic forces acting on the particle balance on the particle itself; there is not a socalled trajectory of the particle in which the composition of forces acting on the particles is zero, but there is a trajectory of the particle in which the radial slip velocity of particle is zero, the trajectory of the particle is signality to the separating particle diameter of the hydrcyclone. The formula of the trajectory of the particle in which the radial slip velocity of particle is zero is offered.
    封面人物
    Cover Person Introduction
    2007, 29(3):  200-201.  DOI: 10.3863/j.issn.1000-2634.2007.03.100
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    Professor Chen Ci-chang, male, was born in Sep. 1948,in Leshan Sichuang Province. He was graduated from Xihua University with a degree in water-professional major in 1977,graduated from Jiangsu University with a degree in master, and graduated from Kyushu University in Japan with a degree in doctor. He has been the deputy director in drainage and irrigation machinery Institute in Jiangsu University, the associate professor and visiting professor in Kyushu University in Japan,the deputy director, director, doctoral tutor in Jiangsu University Power Train Institute,deputy president in Xihua University. He got the allowance from the State Council Government in 1992, member of the 8th People's Congress, the jury committee member of Award for Science and Technology Advancement in Ministry of Machine Building, vice-chairman of agricultural machinery association in Jiangsu Province. He is now Vice-president,professor, doctoral tutor in South West Petroleum University, the scholarship leaders, Vice-president of CPPCC in Sichuan Province.
    Thus far he has guided twenty doctoral students and forty postgraduate students. He has done a lot of work in the aspect of numerical simulation of fluid machinery fluiding, improvement performance and modern test technology;the design theory and method of pump; the multiphase flowing internal fluid machinery; optimum design of low noise and cross flow fan; products development of fluid machinery intelligent system;storage and transportation engineering of petroleum ,natural gas and so on. He has completed nearly 30 projects of the National Natural Science Foundation and Ministry of Science and Technology 973 Project,which are state provincial and ministerial level research projects. He has won paper award of turbine machinery society in japan in 1999,and has received a number of provincial and ministerial level awards such as Sichuan Province, ministry of machine building,ministry of education, Science and Technology Progress Award of Jiangsu Province and so on.CHEN Ci-chan has published five books, one translated book and one collaborated collected paper;has published about 130 papers in the journals at home and abroad; obtained one national patent, one utility model patent.He has been to Dozens of countries, such as the United States ,Canada and so on giving lectures and exchanging communication. He has taken the chair many times as the executive chairman of the International Conference.
    He is currently the fluid machinery professional committee member of Chinese Society of Engineering Thermophysics; Pump and Pumping Station Professional committee member of China Institute of Water Resources and Hydropower; committee member of institute of physics in Chinese Academy of Sciences; committee member of Jiangsu Provincial Key Laboratory of water power project; vice-chairman of Sichuan Institute of hydro-electric power project; vice-chairman of Sichuan Institute of Agricultural Machinery; vice-chairman of Chengdu Institute of Mechanical Engineering; member of Japan Society of Mechanical.
    Guidance for readers
    2007, 29(3):  201-202.  DOI: 10.3863/j.issn.1000-2634.2007.03.101
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    This issue focuses on showing Petroleum Machinery Engineering in SWPU, oil and gas equipment theory system research to readers.
    With the characteristics of oil and gas equipment for a long time,the Petroleum Machinery Engineering has three provincial and ministerial key laboratories. It has a stable and strong research strength on the aspect of developing oil drilling tools, oil and gas equipment theory, ocean petroleum special equipment, machinery modern design theory and manufacturing technology, mechanical system simulation, oil, gas pipe mechanics and so on. The special report “A Brief Introduction to Petroleum Machinery Engineering, Southwest Petroleum University” introduces the details of the subjects to readers.
    “Finite Element Analysis for a Double-Helix Single Screw Pump Bush” is written by CHEN Ci-chan et al.The deformation, stress and strain's distribution of the double-helix single screw pump bush are discussed in this paper when the bush is under equal pressure, disordered pressure and the static contact with the bush and screw. The stress state and deformation regularity of the double-helix single screw pump bush are revealed, and the influence of condensability of the bush material on the deformation discussed, which offer the reference to the optimal design of the structure and the performance improvement of double-helix single screw pump.
    “Study on The Particle Slip Velocity and Separating Diameter” is composed by professor LIANG Zheng et al. In this paper, the dynamic forces acting on the particles and the radial movement of particles in hydrcyclone are studied on the basis of experiment and CFD simulation. The formula of the trajectory of the particle in which the radial slip velocity of particle is zero is offered.
    “Three Dimension Crustal Structure at the Northwest Corner of Tarim Basin” is composed by LAI Xiao-ling et al. LAI Xiao-ling is associate researcher in Geophysical Exploration Center, China Earthquake Administration. This paper using Q-value tomography and hypocenter distribution image, find respectively corresponding with fault in the study region. It provides deep tectonic information for the geologic structure research and the petroleum resources exploration.
    “Design of Data Acquisition System of Measuring Drilling Engineering Parameter Based on Stain Measuring Technology” is composed by Hu Ze,CHEN Ping et al. The authors of the paper design a data acquisition system of drilling engineering parameter while drilling based on strain measuring technology. The data acquisition system adopts ADμC8 series single chip as main controller, by means of four strain gauge full bridge mode, drilling engineering parameters, such as drilling pressure, torque, side pressure and annular pressure etc. can be measured while drilling.
    “Experiment on Abiotic Factor Oxygen Consumption of The Reservoir” is written by KONG Xiang-ping et al. To aerobic microbial enhanced oil recovery, determining the amount of oxygen injection is a problem urgently to be solved. Oxygen consumption of crude oil, injected water and produced water of one block in Shengli Oilfield is probed by analyzing changes of gas composition before and after the reaction in high-pressure oxidation tubes. The results will provide theoretical basis for microbial enhanced oil recovery by adopting air-assistant technique.
    FENG Ru-sen, GUO Yong-jun, XUE Xin-sheng, et al.discussed hydrophobically associating water soluble polymers (HAWP), concluded that all these problems in different aspects are the result of incorrect molecular design and inexact control during polymerization process. The relationship between hydrophobical interaction and properties of HAWP, as well as effects of temperature and salt on HAWP solution, are studied, a new idea about HAWP molecular design is put forward. Our Journal will publish their research “HYDROPHOBICALLY ASSOCIATING WATER-SOLUBLE POLYMER with HIGH-RATIO INTERMOLECULAR ASSOCIATION” in three series.
    In order to encourage authors challenge the customary understanding and construct harmonious society,we will give priority to articles about “Probe and Contends”. Looking forward to your reply and contribution.