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Journal of Southwest Petroleum University(Science & Technology Edition) 2001 Vol.23 Please wait a minute... For Selected: Download Citations EndNote Ris BibTeX Toggle Thumbnails Select SEQUENCE-PALEOGEOGRAPHIC MAPPING OF UPPER TRIASSIC XUJIAHE FORMATION AND UPPER JURASSIC PONLAIZHENG FORMATION IN WESTERN SICHUAN,CHINA XU Qiang ZHU Tongxing MOU Chuanlong 西南石油大学学报(自然科学版)    2001, 23 (1): 1-4.   DOI: 10.3863/j.issn.1000-2634.2001.01.001 Abstract （1007）      PDF（pc） （375KB）（820）       Knowledge map    Save Sequence-paleogeographic mapping is to use information gained from integrated paleogeographic and sequence stratigraphic studies to produce a synchronic or instantaneous lithofacies-paleogeographic diagram, in which the recognized key boundary-surfaces, sequences and system tracks are taken as mapping units. This new method of mapping can not only greatly reduce distortions inherently existing in the traditional mapping methods, but also provide a better perception of sedimentary and tectonic evolution processes and enhance the accuracy of trap prediction. In the present work, sequence- paleogeographic mapping is implemented on the second member of the Upper Triassic Xujiahe Fm. and the Upper Jurassic Ponlaizheng Fm. in western Sichuan, China, with system tracks taken as the mapping units. Related Articles | Metrics Select THE TEST RESULT OF NON-BOUNDLESSTRIELECTRODE PROFILING METHOD IN F FIELD ZHANG Tianlun;ZHANG Bailin;NIE Li;et al 西南石油大学学报(自然科学版)    2001, 23 (1): 5-10.   DOI: 10.3863/j.issn.1000-2634.2001.01.002 Abstract （1610）      PDF（pc） （363KB）（567）       Knowledge map    Save The non-boundless trielectrodo profiling method is a new type of DC resistivity explorating method for directly locatin the boundary range of reservoir on ground surface, which is based on the resistivity difference between the reservoir and adjacent rocks, its theretical basis is the eqipotential surface being normal to the current lines from place to place. The field test results of thenon- boundless trielectrode section method was implemented in Xinjiang, the test results show that this method can effectively determine those reservoirs being obvious resistivity differences with adjacent rocks and their scales large enough relative to the depth, can more accurately locate their boundary range, determine the buried depth of the hydrocarbon layers, and can more accurately differentiate the oil/water interface of single oil-sandstone in the complicated anomalys, too. This test accumulates valuable experiences for the method being popularized and applied in Xinjiang and other regions, and has displayed its good prospects for popularization and application. Related Articles | Metrics Select THE STUDY ON PREDICTING EACH POINT'S PERMEABILITY BASED ON NEURAL NETWORK AND LOG DATA XIA Hong-quan ZHANG Xiang-hui FAN Xian-yu et al 西南石油大学学报(自然科学版)    2001, 23 (1): 11-13.   DOI: 10.3863/j.issn.1000-2634.2001.01.003 Abstract （392）      PDF（pc） （225KB）（670）       Knowledge map    Save Permeability is an important parameter in reservoir interpretation and evaluation. It is very difficult to calculate this parameter from point by point conventional log interpretation for the layers in a single well section. Based on the relation between permeability and each log variable at each point on surrounding rock, this paper puts forward a predicting model, a non - linear relation between logging information and permeability by means of BP neural network, to calculate each point’s permeability at high accuracy. The model is used to process the log data from well T3. The application result is satisfied. The method provides a new approach for permeabilityn interpretation from logging data. Related Articles | Metrics Select DISCUSSION ON THE MIGRATION DIRECTIONS OF OIL AND GAS LIU Quan-wen CHEN Jing-shan YAN Tai-zhen et al 西南石油大学学报(自然科学版)    2001, 23 (1): 14-17(2.   DOI: 10.3863/j.issn.1000-2634.2001.01.004 Abstract （774）      PDF（pc） （310KB）（662）       Knowledge map    Save In the turn-round system, hydrocarbon particles always tend to move to the directions where their turning inertia becomes less. The rotation of the Earth will force hydrocarbon particles to move towards the South Pole and the North Pole,while the revolution of the Earth will make hydrocarbon particles move towards the North Pole. Meanwhile, Coriolis effect will influence the movement of hydrocarbon particles. Oil and gas from the hydrocarbon - generating depressions are distributed around depressions in clockwise direction on the Northern Hemisphere. And oil and gas from the hydrocarbon-generating depressions are distributed around depressions in anticlockwise direction on the Southern Hemisphere. The above conclusion is proved by examples from, among others, the Sixi and Mabei oilfields of Junggar basin, Manjia’er and Yiqikelike oilfields of Tarim basin. Related Articles | Metrics Select THE METHOD AND APPLICATION OF DETERMINE RESERVOIR FLUID BY NMR LOGGING Qi Bao-quan XiaHong-quan Zhang Xian-hui 西南石油大学学报(自然科学版)    2001, 23 (1): 18-21.   DOI: 10.3863/j.issn.1000-2634.2001.01.005 Abstract （736）      PDF（pc） （298KB）（696）       Knowledge map    Save Lithology does not basically affect the measurement of Nuclear Magnetic Resonance (NMR) Logging. It has more advantages over other logging methods in interpreting such reservoir parameters as porosity of bound and movable fluid,permeability and saturation and analyzing the pore structure. Because its’measurement is mainly from the H nuclear contribution of formation pore media to the logging instrument,it can be used to determine the fluid’s types. Nuclear Magnetic Resonance Logging(NMRL) can be applied to define the fluid property in the reservoir, though the practicability of this method is not better than that of interpreting porosity of the reservoir, utilization of NMRL information to distinguish oil、gas and water layer is highly expected. Based on the analysis of basic theory, this paper discusses the logging response characteristics andinterpretation methods of different fluid. And then combining the result analysis of practical well logging information , the feasibility, limitation and practicable condition of recognizing the fluid is also explained in the paper. Related Articles | Metrics Select MATHEMATICAL SIMULATION OF NONLINEAR FLOW THROUGH POROUS MEDIA DENG Ying'er LIU Ci-qun WANG Yun-cheng 西南石油大学学报(自然科学版)    2001, 23 (1): 22-24.   DOI: 10.3863/j.issn.1000-2634.2001.01.006 Abstract （916）      PDF（pc） （174KB）（637）       Knowledge map    Save A nonlinear flow with a moving boundary is one of up-to -date research fields of modern mechanics of fluids in porous media. A mathematical model of a nonlinear flow through low permeability media with a moving boundary is established, an exact analytical solution of the model can not be presented because of the moving boundary. Not only is a numerical solution derived by a finite difference method, but also an approximate analytical solution is given by using an integral method. It is shown that there is good agreement between them. The law of the moving boundary and characteristics of the pressure distribution are derived. Results show that the larger the starting pressure gradient is, the slower the boundary moves, and the slower the pressure transmits. Both approximate analytical solution and numerical simulation can provide engineering design with theoretical basis. The approximate analytical solution has explicit meaning and simplifies analyses and calculation in engineering. The finite difference method that uses variable steps will provide numerical simulation of the three-dimensional nonlinear flow that has a moving boundary with a good method. Related Articles | Metrics Select INVESTIGATION ON RHAMNOLIPID BIOSURFACTANT USED IN ENHANCED OIL RECOVERY OF DAQING OILFIELD LI Hua-bin YANG Zheng-yu YANG Lin et al 西南石油大学学报(自然科学版)    2001, 23 (1): 25-28.   DOI: 10.3863/j.issn.1000-2634.2001.01.007 Abstract （739）      PDF（pc） （167KB）（741）       Knowledge map    Save The experimental study of rhamnolipid (RH) biosurfactant was conducted under conditions of Daqing oil reservoir (such as crude oil, formation water and temperature). Results have shown that the interfacial tension between RH brine and crude oil has not reach 10-3mN/m. but it can reach the ultra-low interfacial tension of 10-3~10-4 mN/m when RH is added into the alkali sulfonate PSD-2 (in the presence of 1.0% NaOH) which was prepared by sulfonating Daqing fraction oil. Further investigation indicates that when 0. 1% RH fermentative solution is added in the system of sulfonate surfactant B-100 (containing 1.2% Na2CO3), not only the interfacial tension is lowered to 10-4 mN/m but also the maximum adsorption of B-100 on Daqing reservoir sandstone is decreased from 0.62mg/g sand to 0.44 mg/g sand. Results of oil displacement on Daqing reservoir cores show that an oil bank is formed in the flooding process and water cut is decreased from 98% to 50%.The oil recovery is increased around 20% OOIP. Related Articles | Metrics Select STUDY ON THE LAYER-SLIP PARAMETER SYSTEMS IN THE EASTERN SICHUAN Li Benliang Sung Yan Zhu Wenbin Guo Jichun Wen Shihon 西南石油大学学报(自然科学版)    2001, 23 (1): 29-33.   DOI: 10.3863/j.issn.1000-2634.2001.01.008 Abstract （759）      PDF（pc） （188KB）（768）       Knowledge map    Save By systematically collecting samples from depositional covers in Huaying Mountain, Eastern Sichuan, Upper Yangtze late, and comprehensively testing and analyzing their rock mechanics parameters and rock physical parameters, the lower Cambrian, upper Ordovician, lower Silurian, upper Permian and middle-lower Triassic formations in the studied area are grouped into typical major sliding layers according to that they are composed of mud stone, shale, gypsum and coal-beds, and characterized by lower resistivity competent, lower physical parameters etc., and the rest are non - sliding layers.Comparing the up, middle and lower parts of the formations on the area by rock mechanics parameters: Rp, Rt, Rs E,λetc.and the rock physics parameters: Vp, Vs, D etc., it has been found that the major sliding layer are basic similar in whole Yangtze plate, and the sliping layers could play an important role of being a regional covering strata. Related Articles | Metrics Select GEOGRAPHIC INFORMATION SYSTEM AND RESERVOIR MANAGEMENT CHEN Wei LI Yun ZHAO Gang et al 西南石油大学学报(自然科学版)    2001, 23 (1): 34-36(6.   DOI: 10.3863/j.issn.1000-2634.2001.01.009 Abstract （1431）      PDF（pc） （299KB）（704）       Knowledge map    Save In dictating the conception, method, application and the development of geographic information system (GIS), GIS has strong power and widely applying perspective because of its organization mode of information, spatial analysis ability and graphic presentation style. Although most of Current GIS systems can process two-dimension problem effectively, for some special three- dimension problem, such as reservoir's management, they are short of description and analysis, So functions of GIS should be expanded by general programming tools. A GIS frame for oil field is presented that includes geologic modeling based on geostatistics method, 3D graphic presentation and GIS toolkit as integration platform for hierarchical information. The frame can extend 3D characterizing ability, which is lacked in current GIS system. Reservoir is itself a complicated spatio - temporal system, reservoir dynamic characterization would be achieved through analysis of dynamic monitoring data and employment of geostatistics method, in this way, GIS techniques will be able to play an important role in reservoir production management and decision-making. Related Articles | Metrics Select PLUG REMOVAL TECHNOLOGY AND APPLICATION OF COMBINING HIGH PRESSURE ROTARY FLUIDICS AND CHEMICALS WANG Zhi-qiang NAN Qing-yi WANG Hai-ju et al 西南石油大学学报(自然科学版)    2001, 23 (1): 37-39(4.   DOI: 10.3863/j.issn.1000-2634.2001.01.010 Abstract （2314）      PDF（pc） （162KB）（782）       Knowledge map    Save To improve the development efficiency of low permeable reservoir, an experimental study on plug removal of combining physical and chemical methods has been conducted on the basis of extracting advantages of similar technology in the country. In the light of geologic features of A- nan oilfield, the major factors that cause reservoir pollution and plug have been analyzed. The plug removal principles of rotary fluidics,chemical agents and the combination of the two have been discussed. In addition, the performance of HB compound plug removal agent, the technology and effectiveness of application in the oilfield have also been discussed. Related Articles | Metrics Select SYNTHESIS OF A VISCOSITY REDUCER AND ITS MECHANISM ANALYSIS LI Jianbo LIANG Fashu GUO Chuanmei et al 西南石油大学学报(自然科学版)    2001, 23 (1): 40-42.   DOI: 10.3863/j.issn.1000-2634.2001.01.011 Abstract （1380）      PDF（pc） （266KB）（810）       Knowledge map    Save The production and transportation of viscous crude are more difficult than normal crude oil because the high content of asphaltene and gum. A comb polymer- terpolymer ester is obtained by polymerizing styrene (S), methyl metharylate(MMA) and acrylamide (AM) then the produced terpolymer reacts with a higher alcohol (ester exchange). Results of evaluation on performance have showed that the comb polymer has good viscosity-reducing effect. The influence of synthetic conditions on the viscosity-reducing effect has been discussed and the mechanism of the viscosity reducer has been analyzed. Related Articles | Metrics Select FREQUENCY CHARACTERISTICS OF PULSATION-JET DEVICE OF SELF-EXCITED OSCILLATION YANG Lin TANG Chuanlin LI Xiaohong et al 西南石油大学学报(自然科学版)    2001, 23 (1): 43-45.   DOI: 10.3863/j.issn.1000-2634.2001.01.012 Abstract （667）      PDF（pc） （250KB）（625）       Knowledge map    Save Based on the theory of fluid network, we established the similar mathematical model of pulsation-jet device of the self-excited oscillation. The numerical results, in agreement with the tests, had clearly shown that the jet nozzle was functions of oscillator and lowpass filter, and the maximal pressure response could be obtained for input flow, and its main frequencies close to the natural frequency of the nozzle. The natural frequency of the nozzle is directly determined by its main structural parameters and wave speed in jet flow, so the parameters such as pressure, the length of oscillation cavity, the diameter of lower nozzle and porosity of jet flow have significant effects on its frequency characteristics. Moreover the design standard of the device was presented in this paper, that is to say, the natural frequency of the nozzle should be close to that of input oscillating flow. Related Articles | Metrics Select STUDY OF OPTIMAL WORK CONDITION ABOUT INSTANTANEOUS-PULSE PERMEABILITY TEST EQUIPMENT YANG Mingsong 西南石油大学学报(自然科学版)    2001, 23 (1): 46-48.   DOI: 10.3863/j.issn.1000-2634.2001.01.013 Abstract （1062）      PDF（pc） （275KB）（620）       Knowledge map    Save The paper studied the optimal condition of the experiment with the methods of instantaneous pulse, steady flow and computer numerical simulation based on the developed installation for determining the physical characters of low permeability reservoir rock with the method of instantaneous pulse. It makes known that the experiment condition is the optimum under the condition of simulated formation pressure,and V1, V2in instantaneous pulse satisfies the expression 0.16≤V2/(V1+V2)≤0.20 . The relative errors between the result of the permeability determined by instantaneous pulse and that of standard selection is the minimum, the pressure distribution curve by instantaneous pulse is in a good agreement with that by computer simulation under the same condition. Related Articles | Metrics Select FLOW-METERING INSTRUMENT OF NATURAL GAS AND ITS OPTIONAL PRINCIPLE SU Hongchun Yuan Zongming 西南石油大学学报(自然科学版)    2001, 23 (1): 49-52.   DOI: 10.3863/j.issn.1000-2634.2001.01.014 Abstract （955）      PDF（pc） （284KB）（591）       Knowledge map    Save Metering of natural gas is one of the most important links of nature gas industry. The gas production system, From well to user, is closed. Metering accuracy not only influences the each procedure of gas production process directly, but also has vital effects on each link of gas producing, supplying and selling. Natural gas metering technology and instrument has been developed rapidly. The properties and optional principles of the widespread used metering instruments, such as orifice flow meter, turbine flow meter and vortex flow meter are stressed in this paper. Related Articles | Metrics Select OPTIMAL DECISION MODEL AND FUZZY EVALUATION FOR RENEWING FACILITY PENG Nan HE Ming 西南石油大学学报(自然科学版)    2001, 23 (1): 53-55.   DOI: 10.3863/j.issn.1000-2634.2001.01.015 Abstract （1364）      PDF（pc） （184KB）（680）       Knowledge map    Save The renovation of facility is an important content in policy -making of plant management .Two problems will inevitably be encountered in the process of facility renewal: First, the old one worn, it should be repaired. Or be replaced by the new one? Second, if the old will be replaced, the new is the same structure with the old or more efficient? To the first problem,we come up with adopting - establish the optimal decision of repairing and renewal, in the light of connection of between repairing cost and failure lost, we can adopt discrete infinity phase decision process of Markov to establish mathematical model to solve the problem. To the later, we can adopt the method of fuzzing evaluation. According to evaluators' specialties, which may be divided several groups, each group encounters one factor subset, fuzzing solution will be got through appraising matrix, and thus all problems will be solved very well. Related Articles | Metrics Select SENSITIVITY ANALYSIS OF SEISM ABOUT THE OIL STORAGE TANK OF STAND-UP CYLINDER LIAO Kexi WANG Yuan ZHANG Haixin 西南石油大学学报(自然科学版)    2001, 23 (1): 56-59.   DOI: 10.3863/j.issn.1000-2634.2001.01.016 Abstract （946）      PDF（pc） （281KB）（646）       Knowledge map    Save The seismic wave will cause the hydrodynamic wall pressure, hydrodynamic shear force, hydrodynamic moments and the liquid surface sloshing in the oil storage tank.Thesetanks usually were damaged by the various seismic responses.With high ratio of the height to radius, the flexible deformation of tall, slender tanks works on its seismic responses. The flexible deformation of the tall-slender tank is not considered in current anti - seismic design standards. Avoiding this shortcoming, based on the analysis of tall, slender tank's nature structure characteristics, a coupling vibration model of tall-slender tanks is put forward. The model discussed the impulsive and convective component of flexible tanks' seismic sensitivity. Finally, the seismic-sensitivity responses of the example for flexible tanks were compared with those of the rigid. Related Articles | Metrics Select STUDY OF TECHNICAL PARAMETERS IN COMPLICATED NATURAL GAS PIPE NETWORK SYSTEM KANG Zhengling YUAN Zongming 西南石油大学学报(自然科学版)    2001, 23 (1): 60-63.   DOI: 10.3863/j.issn.1000-2634.2001.01.017 Abstract （1509）      PDF（pc） （328KB）（691）       Knowledge map    Save The purpose of this paper is to economize the investment and to increase the benefit of our design about the complicated natural gas pipe network under the presupposition that the pipe network itself is advanced through the research of technical parameters in complicated treed natural gas transmission pipe network system. The optimization design was applied into this research and the problem was divided into two sequential subproblems, one is the pipe diameter optimization, the other is the compressor station optimization. The mathematical models were established and solved out, also the optimization design software was developed. The result of the design minimized the consumption of the investment and optimized the arrangement of the technical parameters, such as the diameter of the pipe etc. The results of the example provided for the theoretical support of the plan design, feasibility research and economical evaluation in pipeline, and it is also valuable for reference in other optimization research. Related Articles | Metrics Select HARD MEDIA RECORDS DIGITIZING AND RELATIVE DATA PROCESSING LIN Min YANG Yingxin JIAO Peili 西南石油大学学报(自然科学版)    2001, 23 (1): 64-66.   DOI: 10.3863/j.issn.1000-2634.2001.01.018 Abstract （698）      PDF（pc） （237KB）（604）       Knowledge map    Save This paper introduce a practicable method to digitalize various curves or drawings recorded on hard- media such as paper. The AntoCAD software and a digitizing tablet are both necessary when digitize a curve or a drawing. The curve can be separated by a controllable acquiring - step into a series of short lines end to end and saved in a AntoCAD drawing database file automatically. Coordinates of the end points of the separated lines can be read out from the file by running a special computer program developed by the author. Because the course of the curve digitizing is based upon hypothenuse step, according rules of AutoCAD, not coordinate -step in normal data acquisition cases, it is generally necessary to convert the hypotenuse-step -based data to normative coordinate-step-based onesthrough a special transforming calculation. This convenient and credible method would be very helpful for those people who need to get their various hard-copy curves or records processed and saved by means of computer. Related Articles | Metrics Select THE DATA RESOURCE ORGANIZATION IN ENTERPRISE INFORMATION CONSTRUCTION ZHOU Ronghui 西南石油大学学报(自然科学版)    2001, 23 (1): 67-70.   DOI: 10.3863/j.issn.1000-2634.2001.01.019 Abstract （767）      PDF（pc） （214KB）（621）       Knowledge map    Save The data resource organization is the key and basis of the enterprise information construction, the purpose is to communicate and share the data in entire enterprise. The primary problem of data resource construction is how to implement data integration. An integrated enterprise data system is the key to build the data model for whole enterprise domain, to get the relations of enterprise data entities and to integrate enterprise data on concept level. The standardization and normalization of data is the language base of data communication and sharing. Only all of us follow the standard and specification when developing the management information system, can we eliminate information"isolated island"and implement data integration deed. Sturdy organization is the guarantee of the data resource construction. The paper discusses the importance of the three viewpoints above in details. Related Articles | Metrics Select APPLICATION OF SEQUENTIAL INDICATOR SIMULATION METHOD TO DELINEATING SEDIMENTARY MICROFACIES FENG Guo-qing LI Yun LIN Zuo-hua et al 西南石油大学学报(自然科学版)    2001, 23 (2): 1-4.   DOI: 10.3863/j.issn.1000-2634.2001.02.001 Abstract （828）      PDF（pc） （257KB）（690）       Knowledge map    Save Correctly delineating sedimentary microfacies provides guidance to the study of reservoir heterogeneity and distribution of reservoir parameters. However, traditionally the determination of the boundary of sedimentary microfacies largely relies on the researchers' experiences and thus tends to be subjective. In this work, the Sequential Indicator Simulation Method is used to solve the problem. With the method, equi- probabilistic models of distribution of microfacies in the plan can be obtained. When integrated with the experience of geological researchers, this approach not only demonstrates the variation of microfacies, but also minimizes the uncertainty of models due to the lack of data. Application of the method to the S2-2 layer in X oil field has shown satisfactory results. Related Articles | Metrics Select THE LATEST FAULT-FOLD STRUCTURE AND PETROLEUM PROSPECT IN THE NORTHERN FOOTHILL BELT OF LONGMEN MOUNTAIN SYSTEM HU Shou-quan GUO Wen-ping TONG Chong-guang 西南石油大学学报(自然科学版)    2001, 23 (2): 5-8(39.   DOI: 10.3863/j.issn.1000-2634.2001.02.002 Abstract （1608）      PDF（pc） （204KB）（638）       Knowledge map    Save The formation of Longmen mountain system is duo to the faulting-folding on the Upper Yangtz platform in late Mesozoic-Cenozoic. The western Sichuan fault-depression belongingb to the foreland basin of Longmen mountain system is a composite oil-gas province that consists of platform-type marine sediment and foreland-type continental deposit. The maturity of latest (NQ) fault-fold structure controls the development of structural traps in the foothill belt and the formation of fissured gas pools. Oil and gas accumulations on the Tianjingshan paleo-uplift formed in late Indosinian were destroyed as a result of intensive activities of the latest faulting-folding. Zhaohua area in Guangyuan county, at the NE pinching end of Tianjingshan paleo-uplift, is a favorable oil-gas accumulation belt because there developed a buried fault system and its accompanying fold group. And MianyangJiangyouAnxian area, at the SW pinching end of Tianjingshan paleo- uplift, is a favorable district to prospect middle and shallow secondary gas-pools as where is the conjunction of NE-trending and NW-trending deep faults. Related Articles | Metrics Select THE STUDY ON RECOGNIZING OOLID RESERVOIR FROM WELL LOGGING INFORMATION XIA Hong-quan YANG Huabin ZHU Shi-jun et al 西南石油大学学报(自然科学版)    2001, 23 (2): 9-13.   DOI: 10.3863/j.issn.1000-2634.2001.02.003 Abstract （996）      PDF（pc） （329KB）（717）       Knowledge map    Save Based on well logging response characteristic of oolid reservoir and electrical- lithologic database from log parameters of lithology, automatic classifying formation is realized. By gray conjunction method, oolid formation of each well profile is identified and the log recognition pattern for oolid reservoir is estab- lished by combining reservoir parameters and then the programs is developed. The application shows that this method has higher resolution and is able to classify oolid reservoirs of thicker than 0.5 meter and improves the prediction precision in vertical and horizontal direction. Related Articles | Metrics Select STUDY OF THE PERFORMANCE CHARACTERISTICS OF INJECTION AND PRODUCTION ON IGNEOUS-ROCK RESERVOIRS WU You-jia 西南石油大学学报(自然科学版)    2001, 23 (2): 14-18.   DOI: 10.3863/j.issn.1000-2634.2001.02.004 Abstract （796）      PDF（pc） （174KB）（679）       Knowledge map    Save Igneous-rock reservoirs in China are mainly distributed in XinJiang, where they have been under water injection recovery for several years. Performance data show that these reservoirs are characterized by: great variation in productivity among oil wells, quick decline of producing ability for both oil wells and oil field, non-existence of a stable production period, and marked difference in absorption capacity among injection wells. Furthermore, during injection production, a few producing wells would experience severe water channeling or be quickly flooded out while most other wells would not witness injection effect for a long time. And the oil recovery is typically around 813%. All these are consistent with the geological character of well-developed fractures and strong heterogeneity of the reservoirs. In accordance with such characteristics, it is strongly suggested that in the development of these reservoirs water injection be carefully planned, more attention be given to the management of the high-production wells, and water injection into the well groups experiencing severe water channeling be terminated or kept at interval. Related Articles | Metrics Select RESEARCH ON WATER FLOOD OF THE FRACTURED A-BEI ANDESITE RESERVOIR SONG She-min HUANG Zhe 西南石油大学学报(自然科学版)    2001, 23 (2): 19-21.   DOI: 10.3863/j.issn.1000-2634.2001.02.005 Abstract （1020）      PDF（pc） （241KB）（586）       Knowledge map    Save The A-Bei andesite reservoir was formed as a result of three phases of volcanic extrusions, and it exhibits characteristics of a typical double-porosity system. During waterflood recovery, the water cut increased very fast and production declined quickly as a consequence of injected water channeling a- long fractures. To cope with this problem, detailed studies on the regularity of fracture occurrences were carried out and,based on the information gained, five kinds of waterflood plans were designed and altogether 13 different programs were performed. The FIFS reservoir numerical simulation software is used to optimize the programs. The proposed measures include "injection along fractures and production from matrix blocks" and "periodical injection and overall adjustment of injection profile with chemical agents". After six years of performance, the water cut is decreased by 4%, the cumulative increase of oil production is 4. 2×104 t, and the recovery is increased by 2.5%. The knowledge and experience gained from this work may provide useful reference for the injection program of similar reservoirs. Related Articles | Metrics Select THE APPLICATION OF CONTINUATION ALGORITHM TO CALCULATION OF PHASE EQUILIBRIUM OF RESERVOIR FLUIDS WANG Jin-xun LI Shi-lun LIU Yu-hui 西南石油大学学报(自然科学版)    2001, 23 (2): 22-24.   DOI: 10.3863/j.issn.1000-2634.2001.02.006 Abstract （826）      PDF（pc） （216KB）（662）       Knowledge map    Save Continuation ( orHomotopy) method was applied to calculate the dew-point pressures of four gas condensate systems under reservoir temperatures in comparing with Newton iterative method and Broyden method. The effects of initial iteration pressures on the convergence of dew-point pressures were studied based on the results from the three different methods.The Peng and Robinson equation of state was used for all calculations. The results showed that continuation method is an efficient algorithm for the phase equilibrium calculations of reservoirfluids. Related Articles | Metrics Select STUDY ON THE PHASE-STATE RESTORARION OF GAS CONDENSATE RESERVOIRS GUO Ping SUN Lei SONG Wen-jie et al 西南石油大学学报(自然科学版)    2001, 23 (2): 25-29.   DOI: 10.3863/j.issn.1000-2634.2001.02.007 Abstract （948）      PDF（pc） （372KB）（734）       Knowledge map    Save PVT data of gas condensate reservoir provide important parameters for reservoir numerical modeling and recovery planing. For various reasons, however, representative PVT samples of the initial development phase are often not available. Phasestate restoration is one of the methods usually used to solve this problem; but systematic study on the theories behind phase- state restoration is lacking. In the present work, the general principles of phase-state restoration of gas condensate reservoirs and their application to the Yinmai Well 7 in Tarimu basin are given. After data matching, phase-state restoration was performed directly on the effluents from the well at different formation pressure drawdowns. Restoration was also performed on mixed separator oil and gas samples assuming the GOR of the initial production phase or assuming a formation pressure equal to the dew pressure. Comparison is made on the influence of the two types of restoration on the fluids as being representative of the initial formation fluids. Related Articles | Metrics Select EXPERIMENTAL EVALUATION OF CARBON DIOXIDE INJECTION FOR ENHANCED OIL RECOVERY IN LIAOHE LIGHT OIL DISTRICT XIONG Yu SUN Lei LI Shi-lun et al 西南石油大学学报(自然科学版)    2001, 23 (2): 30-32.   DOI: 10.3863/j.issn.1000-2634.2001.02.008 Abstract （896）      PDF（pc） （243KB）（635）       Knowledge map    Save It is an important way to enhance oil recovery through gas injection after injecting water. The efficiency of EOR of carbon dioxide injection relates closely to the properties of crude oil.Whether carbon dioxide injection can be conducted will be decided according to PVT parameters, MMP of crude oil with CO2 and crude oil properties after CO2 injection. We pick 5 typical oil samples from different oil companies in Liaohe oil field study the phase behavior characterization and analyze the oil properties after the crude oil is miscible with CO2. We also measured the minimum miscible pressures of two oil samples,according to which we evaluated the crude oil properties and an- alyze the possibility of CO2 injection. The results showed that CO2 injection in Liaohe light oil district can enhance oil recovery, but it is difficult for crude oil to be miscible with injected CO2. Related Articles | Metrics Select MECHENISM OF CO 2 MISCIBLE FLOODING DURING MULTIPLE CONTACT PROCEDURE SU Chang SUN Lei Li Shi-lu 西南石油大学学报(自然科学版)    2001, 23 (2): 33-36.   DOI: 10.3863/j.issn.1000-2634.2001.02.009 Abstract （836）      PDF（pc） （278KB）（909）       Knowledge map    Save Nowadays, synthetic water cut in on-shore oil fields reaches 81%. Outputs begin decreasing, as a result, developing enhanced oil recovery by injecting gas becomes a tactic task for sustainable development of on-shore oil industry. The wide range application of CO2 injection based on the success of field test requires further study of mechanism of CO2 miscible flooding procedure. Though it is well known that CO2 decrease oil viscosity by swelling in it, the variation of physical parameters of each phase in the procedure of multiple contact is not well studied. In this paper, the author established a one-dimensional simulation method considering Zhong Yuan oil field to calculate and analyze such parameters as composition, density,viscosity and interfacial tension. Related Articles | Metrics Select DECLINE ANALYSIS OF GAS WELL IN EDGE WATERDRIVE GAS RESERVOIRS LI Xiao- ping ZHAO Bi-rong YANG Lei 西南石油大学学报(自然科学版)    2001, 23 (2): 37-39.   DOI: 10.3863/j.issn.1000-2634.2001.02.010 Abstract （1596）      PDF（pc） （272KB）（688）       Knowledge map    Save The deliverability of gas well is affected by the magnitude of aquifer energy in edge water-drive gas reservoirs, so it is of real significance to study the effect of aquifer energy on the production of gas well. In this paper, the magnitude of edge-water energy is expressed by the aquifer influx intensity, which is defined as the ratio of aquifer influx to well rate. The fluids flow mathematical model was set up by taking account of edge water-drive while the bottomhole pressure is constant. After solving the mathematical model, the decline curve of gas well in edge water-drive gas reservoir was plotted, based on which we studied the effect of both edge water-drive intensity and gas water mobility ratio on the decline curve. The results showed that the well deliverability is affected by both water drive and gas-water mobility ratio. The theory presented in this paper can be used to forecast the production of gas well in edge water-drive gas reservoir. Related Articles | Metrics Select ANALYSIS OF PRESSURE TRANSIENT BEHAVIORS IN ARBITRARILY SHAPED RESERVOIRS BY THE BOUNDARY ELEMENT METHOD LIU Qi-guo LI Xiao- ping WU Xiao- qing 西南石油大学学报(自然科学版)    2001, 23 (2): 40-43.   DOI: 10.3863/j.issn.1000-2634.2001.02.011 Abstract （918）      PDF（pc） （176KB）（650）       Knowledge map    Save The effect of the shape of reservoir boundaries on the well-bore pressure response is evident. The conventional analytical methods can only be used to calculate wellbore pressure responsein regularly shaped reservoirs. In this paper, according to the theory of Boundary-Element Method (BEM), pressure transient solution in an arbitrarily shaped reservoir with any number of irregularly shaped impermeable sub-regions is proposed by Laplace domain BEM. By using Duhamel theorem, the influence of wellbore storage and skin effect on pressure transient response is considered. Then the BEM results are compared to that of analytical methods. And pressure transient behavior characters in arbitrary reservoir shaped are analyzed. Related Articles | Metrics Select QUANTITATIVE EVALUATION AND ANALYSIS OF FORMATION DAMAGE DUAN Yong-gang 西南石油大学学报(自然科学版)    2001, 23 (2): 44-46.   DOI: 10.3863/j.issn.1000-2634.2001.02.012 Abstract （1595）      PDF（pc） （237KB）（706）       Knowledge map    Save Skin factor is the most important parameter that diagnoses and identifies formation damage, and also reflects loss of oil well production. According to well testing assumption, the paper suggests skin factor from well testing that will be recollected and annualized, also give out calculation formulation. By examples,quantitative evaluation of formation damage is very good. It is feasible method that is evaluation of formation damage in drilling, completion and stimulation. Related Articles | Metrics Select RESEARCH ON HIGH PERMEABLE CEMENT OPERATION AND SAND CONTROL CAPABILITY CHEN Er-ding CHEN Da-Jun LI Bin-yuan 西南石油大学学报(自然科学版)    2001, 23 (2): 47-49.   DOI: 10.3863/j.issn.1000-2634.2001.02.013 Abstract （1465）      PDF（pc） （243KB）（597）       Knowledge map    Save The experimental study on the performance and sand control capability of the high permeable cement has been conducted. Results have shown that the system has good effects in the operation and sand control. After drilling and reaming, we may pump the slurry into the expected open-hole productive zone where sand is probably produced in order to put up the initial sand control. For the oil well where sand has been produced,we may squeeze the slurry into high permeable sand after sand plug is cleaned out. It will form a high permeable artificial bore-hole after solidification in order to provide the sand control during later period. As a result, a new sand control technology is put forward. That is, the high permeable cement replaces some conventional completion methods such as open hole and gravel pack completion after drilling. This will be a technological innovation on open hole completion and a promising sand control technology. Related Articles | Metrics Select FIELD APPLICATION OF MTC CEMENT TECHNOLOGY IN ZHONGYUAN OILFIELD MA Jun-zhi JIA Chao-yang YAN hi-ping et al 西南石油大学学报(自然科学版)    2001, 23 (2): 50-52.   DOI: 10.3863/j.issn.1000-2634.2001.02.014 Abstract （1519）      PDF（pc） （151KB）（639）       Knowledge map    Save Mud-To-Cement (MTC) is the technology that may convert drilling fluid to cement slurry by adding cheap blast furnace slag (BFS) and stimulated agent and making use of the properties of fluid loss control and suspension of drilling fluids.As we know, ordinary cement is usually incompatible with drilling fluids and it can cause contamination of cement and has a very bad influence on the performance of cement slurry. A mud-cement system that has 1.50~1.60 g/cm3 n density has been designed. Results of tests and field application indicate that this system has advantages of good compatibility, high compressive strength and adjustable thickening time. In Zhongyuan oilfield, it was firstly applied in ten wells of the Third Drilling Company and got great success. In this way, the cost of cementing can be decreased greatly. Therefore this technology has been popularized in this area. Related Articles | Metrics Select THE DETERMINATION OF BOUND WATER BOUNDARY ON CLAY SURFACE BY INFRARED SPECTRUM WANG Ping-quan TAN Jing-ming CHENG Di-kui 西南石油大学学报(自然科学版)    2001, 23 (2): 53-55.   DOI: 10.3863/j.issn.1000-2634.2001.02.015 Abstract （995）            Knowledge map    Save In accordance with wall of well-bore instability induced by bound water on clays, Infrared spectrum is utilized to determine the types and boundary line of bound water on clays, and the information about chemical-bonding in water and interaction between water and clay-mineral. The results show that clay-minerals adsorb water when they interact with water.The O-H's expanded and contracted frequency v will reduce along with adsorbed water content growth in hydro-clays.Theprocess that O-H's expanded and contracted frequency vchanges along with relative vapor pressure p/pshas the charac- teristics - fast first, slow then, fast again, and steady forever.There are two clear turning points which are p/ps=0.9, 0.98,the two turning points are the special humidity of clay-water system. The relative vapor pressure 0.9 is the boundary line between the strong bound water and the loose bound water(os motic bound water) on clays, the relative vapor pressure 0.98 is the boundary line between the loose bound water and free water on clays. The results are identical with Ion exchange. Related Articles | Metrics Select MICROSTRUCTURE ANALYSIS OF SURFACING WELDING LAYER OF CEMENTED CARBIDE ON THREE CONE BIT LIU Cheng-jie TANG Xiao-wen CHEN Hao et al 西南石油大学学报(自然科学版)    2001, 23 (2): 56-59.   DOI: 10.3863/j.issn.1000-2634.2001.02.016 Abstract （1003）      PDF（pc） （251KB）（716）       Knowledge map    Save In this paper, we studied the quenching and cryogenic treatment processes of WC-Co and founding tungsten carbide cemented carbide, and analyzed their microstructure and the cause of increased performance of these treatment as well as the mechanism of increased performance of these treatment. It is conformed that the microstructure of WC-Co cemented carbide isγ′and M7C3, M6C, W23C6carbide and founding tungsten carbide isηand M7C3, M6C, M23C6. The adhesive phase can be strengthened and the histology and the microstructure can be improved by quenching and cryogenic treatment. Related Articles | Metrics Select THE EVOLUTION OF DIFFERENTIAL OVERRUNNING SPEED CLUTCH AND ITS THE COMPANY COUPLER MECHANISM LIN Jun Wang Wei HUANG Mao-lin 西南石油大学学报(自然科学版)    2001, 23 (2): 60-61.   DOI: 10.3863/j.issn.1000-2634.2001.02.017 Abstract （728）            Knowledge map    Save Overrunning Speed Clutch is one of the key pats in impulse Stepless Speed Regulators, and working capability depends on the control factor of its mechanism efficiency, twist moment and life-span. Aiming at the characteristic of poor dynamic-power, additional dynamic load and speed fluctuation of the higher pair Overrunning Speed Clutch, we put forward a new lower-pair Differential and Double Brake-block Overrun-ning Speed Clutch, and introducing the process of its evolution.The internal contact between the natural increment coefficient and brake blocks was studied, the natural increment coefficient is an important gist, which scales and distinguishes whether Differential and Double Brake-block Overrunning Speed Clutch can realize normal work or not. According to analyze the company coupler mechanism of Differential and Double Brake-block Overrunning Speed Clutch, we consider this kind of Overrunning Speed Clutch possesses the character functions that can pressurize through internal force. It can automatically adapt to the slight size change of output shaft in the direction of X ax-is and Y axis. So the working ability is improved. Related Articles | Metrics Select EFFICIENCY ANALYSIS ON THE FIELD GROUND WATER INJECTION SYSTEM LIANG Guang-chuan ZHENG Yun-ping PENG Zhi-xue et al 西南石油大学学报(自然科学版)    2001, 23 (2): 62-65.   DOI: 10.3863/j.issn.1000-2634.2001.02.018 Abstract （814）      PDF（pc） （264KB）（664）       Knowledge map    Save The ground water injection systems are of the characters of low efficiency, high electricity expense in China oil fields. Improving water flood efficiency and lowering electricity expense are the key way to achieve better economic results. This paper aimed at the actual situation of water flood technology and each link of water flood system , promoted the system energy flow mode and mathematical mode, combined the practical features of ZHONG YUAN field WEI CHENG water flood system advanced the water flood efficiency judge standard ,developed the water flood efficiency analyze software. This paper also put forward some suggestions about how to improve the water flood ef- ficiency. Related Articles | Metrics Select ANALYSIS AND APPLACATION ON DISTRIBUTED BASED ON COM/DCOM COMPONENT JIANG Jun FAN Rui Li Yu 西南石油大学学报(自然科学版)    2001, 23 (2): 66-69.   DOI: 10.3863/j.issn.1000-2634.2001.02.019 Abstract （976）      PDF（pc） （167KB）（663）       Knowledge map    Save The distributed computing technology is now widely used in software development, which makes the developing of large complicated network application easy. The Component Object Model- COM and Distributed Component Object Mode-DCOM technology is one of the distributed computing tech-niques presented by Microsoft. This paper analyzed the distributed computing Architecture based on COM/DCOM in detail, and summarized some implementing methods of COM/DCOM components and 3-tier client/server application. Finally, and 3-tier client/server application based on COM compo- nents was given. Related Articles | Metrics Select CARRYING OUT PROGRAM EVALUATION AND REVIEW TECHNIQUE LIU Xian-tao LIU Xian-feng; 西南石油大学学报(自然科学版)    2001, 23 (2): 70-71.   DOI: 10.3863/j.issn.1000-2634.2001.02.020 Abstract （1500）      PDF（pc） （207KB）（566）       Knowledge map    Save Program evaluation and review technique is a scientific method of production management and plan management. It has widely used in industry and agriculture as well as scientific research. In order to practical circumstances, we put forward to a problem of carrying out program evaluation and review technique, and discussing the definition and the classification of carrying out program evaluation and review technique on the base of present program evaluation and review technique. It gave out the solution of the program and an example. The results of analysis and calculation have proved that it is simple and convenient. It has a guidance meaning for practical work. Related Articles | Metrics Select OPTIMAL SOLUTION OF PROGRAMMING PROBLEM UNDER UNDEFINED CASE ZHANG Ji-jun 西南石油大学学报(自然科学版)    2001, 23 (2): 72-74.   DOI: 10.3863/j.issn.1000-2634.2001.02.021 Abstract （742）      PDF（pc） （239KB）（624）       Knowledge map    Save How to define the optimal solution is the key to solving the undefined case programming, the paper pointed out a few problems to the optimal solution defined by the predecessors with practical cases, then we put forward to the new definition of solution of interval number linear programming problem. Related Articles | Metrics page Page 1 of 4 Total 128 records First page Prev page Next page Last page