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    20 October 2006, Volume 28 Issue 5
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    地质勘探
    SEDIMENTARY TEXTURE CHARACTERISTIC IN THE ALLUVIAL FAN IN DALI BASIN
    CHENG Li-hua CHEN Shi-yue WU sheng-he et al
    2006, 28(5):  1-5.  DOI: 10.3863/j.issn.1000-2634.2006.05.001
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    The alluvial fan of Yinxian stream is located between Erhai Lake and Diancang Mountain, in the Dali Basin, Yunnan province, which is 2.5km far from ancient Dali city. The surface gradient of the fan ranges from 10°at inner fan, to 6°at middle fan and 2° at outer fan. On the basis of field observation and indoor analysis, the sediment of the fan is classified into four kinds of lithofacies, i.e., intermixed mudrock facies, sandconglomerate facies without mud, cribrose lithofacies and boulder facies. At the same time, the sedimentsize ingredient of each subfacies is analyzed contrastively and the sedimentsize variation law of the whole fan is analyzed in detail, which shows a radial decrease in the grain size from proximal to distal fan with the gradually diminishing velocity. This decreasing law can be fitted well by logarithm curve.
    THE DISTRIBUTION PATTERN OF INTERLAYER AND ITS CONTROLLING FUNCTION ON REMAINING OIL
    WANG Yan-hang LIN Cheng-yan WEN Chang-yun et al
    2006, 28(5):  6-10.  DOI: 10.3863/j.issn.1000-2634.2006.05.002
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    As the oilfield development enters into high containing water stage，the controlling function of the interlayer on the remaining oil is more and more obvious. From the description of interlayer，combining the cases of Liangjialou oil field， according to the shape， the distribution position and its controlling function on the remaining oil， the interlayer can be classified into 11 styles， such as upper protruding style， upper concave style， upper board style， middle protruding style， middle-concave style， middle board style， lower protruding style， lower concave style， lower board style， crossing style and arc style，and its functions on the remaining oil are described〖JP2〗 respectively. The result is that the remaining oil is most rich in the interlayer of upperprotruding style， and most poor in the interlayer of middleconcave style. In order to enhance the recovery of oil， the remaining oil sealed by upper interlayer is suitable for the horizontal wells and waterblocking， and the remaining oil sealed by middle interlayer is suitable for the instability injection， and the remaining oil sealed by upper and lower interlayer is suitable for the combining of waterblocking and holepatching.
    LIMITATION OF BIOMARKERS IN THE OIL SOURCE CORRELATION
    CHEN Shi-jia ZHANG Yu LU Jun-gang
    2006, 28(5):  11-14.  DOI: 10.3863/j.issn.1000-2634.2006.05.003
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    Biomarkers is the most common material in oil-source correlation. It is easy to result in the wrong oilsource correlation for multisource or multiple accumulations reservoir because of the obviously different content of biomarkers at different mature stages. Because only biomarkers are used and changed content of biomarkers ignored in different stages, different people give the different result to the oil-source correlation of Hongche oil field in zhunger basin. The auther integrates light hydrocarbons and biomarkers to resolve the oil-source correlation effectively in Hongche oil field. The result that the oil distribution has the obvious regularity are given and the oil of the Permian and Carboniferous stratum of the north section of the fault block belt is pointed out to be from Fengcheng group hydrocarbon source rock; Oil of Jurassic and Cretaceous stratum in South central section comes from Wuerhe hydrocarbon source rock, and belongs to the mature crude oil.

    METHOD OF DETERMINATING OIL AND GAS MIGRATION BY GRAINS WITH OIL INCLUSION AND ITS APPLICATION
    JIANG Fu-jie JIANG Zheng-xuePANG Xiong-qi et al
    2006, 28(5):  15-18.  DOI: 10.3863/j.issn.1000-2634.2006.05.004
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    Index of Grains with Oil Inclusion indicates the richness of fluid inclusions in the rocks and its values and characteristics can be used to show the history of oil and gas migration and accumulation, which helps to delimit the most extension of oil and gas migration on the plan and the section in a area. In this paper, the definition of GOI has been introduced, and then the principle and the criterion as well as the operation process utilizing GOI delimiting the oil and gas migrating scope have been presented. The application on the Binbei area in Songliao basin showed that the oil and gas migration range of shallow accumulation assemblage in Binbei area mostly covered 20000km2 closed to the Binzhou railroad on the plan and the range of it mostly extends between 1500m and 2000m on the section. The oil and gas shows and the law of oil and gas distribution controlled by hydrocarbon source rocks confirmed the results.
    THE RESEARCH PROGRESS AND RECGNITION OF OIL AND GAS RESERVOIR FLOW UNIT
    LIU Jian-feng PENG Jun JIA Song et al
    2006, 28(5):  19-22.  DOI: 10.3863/j.issn.1000-2634.2006.05.005
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     The study of petroleum and gas flow unit is an interacademic research direction that combines geology with petroleum field development engineering, and affects each other. The paper has tersely reviewed the progress and status of the study of flow unit in home and oversea recent 20 years, and resumed the conception and research methods from many aspects, and brought forward personal realization and opinions on the comparison between flow unit and rocks physics facies, about the conception of dynamic flow unit, about the selection of the parameters on quantitatively description of flow unit and discussions on FZI methodology in flow unit identification and discrimination. Further it looked forward more efficiently to studying flow unit. 
    APPLICATION Of HIGH RESOLUTION SEQUENCE STRATIGRAPHY ON DIVISION OF FLOW UNIT
    FAN Ji-zong HEN Lin-yuan ZHANG Su-jun
    2006, 28(5):  23-25.  DOI: 10.3863/j.issn.1000-2634.2006.05.006
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    Aimed at the characteristics of Sa2+3members in Pucheng oilfield, i.e, simple and whole reservoir structure, thick pay zone, heavy inner formation heterogeneity, poor development effect, flow unit is divided by identification of drilling and logging baselevel cycle based on HighResolution Sequence Stratigraphy, so as to compare flow unit by correlation of baselevel cycle. Reservoir is subdivided into nineteen subzones. After subdivision some internal contradiction is transformed to interlayer contradiction, which will supply some warrant to development adjustment.
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    RESEARCH ON METHOD OF MIXED OPTIMUM IMPEDANCE INVERSION
    PENG Cai ZHU Shi-jun SUN Jian-ku et al
    2006, 28(5):  26-28.  DOI: 10.3863/j.issn.1000-2634.2006.05.007
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    The genetic algorithm is a stochastic search method of global optimization, but also it has the disadvantages of low local search ability and precision. In order to solving the disadvantages this paper introduces pattern search, using the strong local search ability and high precision of pattern search to offset it. First of all, using generitc algorithm to compute a number of generations, and take all searched points as the first points of pattern search, then quicken convergent velocity. The analysis of theorized model and example computing validate the method of mixed optimum algorithm.
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    APPLICATION AND EVALUATION OF SEISMIC DATA IN YUSHULIN OIL FIELD
    LI Chuan-jiang;
    2006, 28(5):  29-32.  DOI: 10.3863/j.issn.1000-2634.2006.05.008
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    In order to increase the resolution of seismic data and better describe reservoir, Some used seismic data are processed and explained in high differentiate ratio at area 103 in Daqing Yushulin oil field 103 block. Not only general explaining method but also explaining method of contrasting seismic data of high and low frequency is adopted. Better effect is obtained. The new thought is of great sense for development of Fuyu layer, Yangdachengzi layer and Putaohua layer in Yushulin oil field.
    THE METHOD OF EVALUATING THE EFFECT OF INHIBITOR FOR ANTISWELLING USINGXRAY DIFFRACTION INSTRUMENT
    XU Hong-ming; TANG Hong-ming;TIAN Gang ZHI Xi-jin
    2006, 28(5):  33-35.  DOI: 10.3863/j.issn.1000-2634.2006.05.009
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    This paper establishes a direct，fast method and experiment process of evaluating the effect of the inhibitor for anti swelling by using X ray diffraction instrument — X ' Pert Pro，taking Na smectite for example which has the strongest swelling capacity，making use of the principle of testing the lattice spacing of smectite by X ray diffraction instrument.It systematically tests the changes of Na smectite treated by the distilled water，organic and inorganic inhibitors for anti swelling of clay，shown by the research，the changes of smectite's lattice spacing can directly reflect the effect of the inhibitor for antiswelling。And the author takes two different methods to evaluate the stability and durative of the inhibitor for anti swelling，increasing the performance parameter of evaluating the inhibitor for anti swelling．
    THE MICROSCOPIC CHARACTERISTIC AND MEANINGS OF FRACTURED RESERVOIR IN QING XI AREA
    PAN Xue-feng ZEN Wei ZHANG Zhuang SHEN Yan
    2006, 28(5):  36-39.  DOI: 10.3863/j.issn.1000-2634.2006.05.010
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    There are three kinds of reservoir space in clay stone and dolostone in lower Cretaceous at Qingxi areas, Yumen oil field: fracture, vug and pore, and the characteristics of capillary pressure curve like a ladder. According to the characteristics of the fracture, vug and pore on the capillary curve, the fracture porosity, vug porosity, pore porosity, the wide of fracture, throat diameter of vug and pore can be calculated. Reservoir can be classified on the bases of every section of reservoir space on the capillary curve. At last, connecting factor is put forward, which can fully reflect the pore texture characteristics of fracture reservoir.
    石油与天然气工程
    THE SOLUTION OF COMPOSITE DOUBLE PERMEABILITY RESERVOIR PRESSURE DISTRIBUTION
    SUN Wen-tao HUANG Bing-guang LI Shun-chu WANG Nu-tao
    2006, 28(5):  40-43.  DOI: 10.3863/j.issn.1000-2634.2006.05.011
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    In view of constant pressure outside boundary double permeability composite oil reservoir model, the variable rate question dimensionless pressure distribution Laplace solution has been studied, and the corresponding application briefly derived. The research perfects well testing theory, it has the profound application value to well test analysis software development, also has the guiding sense to the oil reservoir numerical simulation method.

    PREDICTION METHOD OF THE PRESSURE FALL IN PRODUCING WELL SECTION OF SNAKY WELL
    QI Zhi-lin DU Zhi-min TANG Yong SHU Qiu-ju WANG Wei
    2006, 28(5):  44-46.  DOI: 10.3863/j.issn.1000-2634.2006.05.012
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    Snaky well is a new type of complex well. Its producing well section is rugged longitudinally. The flow property of Snaky wellbore is different from horizontal pipe and horizontal well's. The article researched the flow property of Snaky wellbore and analyzed the flow for the minielement section and perforation section of the snaky well. Based on the continuity equation and the momentum equation, the pressure fall models of wellbore flow within an openhole and a perforated completion snaky well bore are established .The calculating methods of pressure fall were proposed for producing well section of the snaky well under the two working systems of constant production and constant bottomhole pressure. The pressure fall of the producing well section of an openhole completion snaky wellbore was calculated separately using the model established in the article and the calculating model of pressure fall for the horizontal section of the horizontal well .The results showed the pressure fall of the producing well section of snaky well couldn't be calculated with the pressure fall model of the horizontal sections of conventional horizontal wells. The pressure fall of producing well section of snaky well couldn't be omitted.

    EVALUATION OF FORMATION DAMAGE INDUCED BY SUSPENDED PARTICLES DURING WATER INJECTING
    LI Hai-tao WANG Yong-qing JIANG Jian-xun
    2006, 28(5):  47-49.  DOI: 10.3863/j.issn.1000-2634.2006.05.013
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    Suspended particle removal is one of the main measures of water quality control in oilfield water treatments, predicting the damage extent due to suspended solid plays a very important role in determining suitable water quality specifications. In this paper, the mutual interactions and effects of particle content, size, core permeability and cumulative injected pore volumes on core flowing efficiency were effectively assessed in the first time by involving orthogonal experiment design method. The relationship of porethroat and nondamaging particle size and lots of useful conclusions were acquired with the help of nonlinear regression analysis techniques. It exhibits paramount guidable significance in establishing reasonable water quality standard and constituting formation protecting measures in oilfield.

    EXPERIMENTAL ORTHOTROPIC ANALYSIS OF ROCK MECHANICS PROPERTY
    LI Jun CHEN Mian LIU Gong-hui
    2006, 28(5):  50-52.  DOI: 10.3863/j.issn.1000-2634.2006.05.014
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    In the traditional rock mechanics analysis, the formation is always simplified to orthotropic and transverse isotropic. On the basis of detailed analyzing petroleum engineering background regarded to rock mechanics, the rock mechanics orthotropic experiment was done with the drilling core. The experimental results show that the anisotropy of the mechanical property in the plane perpendicular to the wellbore axis is existing. So in some extreme geologic environment, the degree of orthotropic is relatively obvious, the formation can not be simplified to transverse isotropic.
    A NEW HYDRODYNAMIC SIMULATION OF FRACTURE PORE CARBONATE RESERVOIR IN TAHE OILFIELD
    TU Xing-wan CHEN Zhao-hui
    2006, 28(5):  53-56.  DOI: 10.3863/j.issn.1000-2634.2006.05.015
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    Tubing flow theory is commonly used to study the fluid flow in continuous medium. However, it is not applicable to the fracturepore carbonate reservoir in Tahe oilfield, which is characterized by network reservoir, with cavity as the main accumulating space and facture as the connection channel. Both geology research and production practice indicate that the flow medium is fracturepore unit which is noncontinuous and the seepage model could not describe its flow performance and interpret its special production dynamics. A new hydrodynamic model, which is based on the tubing flow theory, is put forth in this paper. The flowing in fracture and pore is studied through the analysis to the space location and oil/water distribution in cavity. The equivalent hydrodynamic model of typical well is built from the geologic results and the flow mechanism in network reservoir is studied through this new model. Simulation results indicate this model is reasonable and effective .
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    OPTIMAL RESEARCH OF DEVELOPMENT SCHEME FOR SMALL OIL SAND BODIES AND THIN OIL FORMATION
    CHEN Rui
    2006, 28(5):  57-60.  DOI: 10.3863/j.issn.1000-2634.2006.05.016
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    Along with ceaselessly deeper of exploration and development, high quality reserves are less and less. At present, the target had gradually been diverted to small oil sand body and thin oil formation, and more and more difficult to develop. Under this kind of development status, and how to reasonable develop small oil sand body and thin oil formation, and it is a key problem. This article contraposed number 301 small oil sand bodies and geological reserves of Qiquxi Block in Gudong Oilfield, and applying the methods of petroleum engineering combining numerical simulation, the reasonable development scheme of small oil sand body and thin oil formation is optimized researched and the economic and feasible development scheme for different
    small oil sand body and thin oil formations are determined. It is significant to enhance recovery factor and recoverable reserves of old oilfield. 
    THE RESEARCH ON IMPROVING THE WATER FLOODING EFFECT IN THE MIDLATE DEVELOPMENT STAGE
    ZENG Xian-hong
    2006, 28(5):  61-64.  DOI: 10.3863/j.issn.1000-2634.2006.05.017
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    To the common water flooding oilfields, it is commonly seen that most of the oilfields face the problem that the water flooding effect gets poorer due to the higher ratio of wateroil viscosity when the oil fields reach the midlate development stages. In the paper, Haiwaihe Oilfield is taken as an example for the research. In view of the existing such problems in the oilfield as complicated geological conditions, low recognition degree of the oilfield, incomplete injectionproduction system, low producing degree by the water flooding, centered on 'injecting enough and good quality water ',the accurate geological and residual oil distribution regulation research are carried out. As a result, the water flooding effect has been greatly improved by appropriate measures, including perfecting injectionproduction well pattern, subdividing the water flooding unit, draining liquid, controlling the ineffective water cycling, controlling sand production and preventing casing destroy.
    NUMERICAL SIMULATION FOR MICROBIAL ENHANCED OIL RECOVERY (MEOR)
    LI Ke LI Yun
    2006, 28(5):  65-68.  DOI: 10.3863/j.issn.1000-2634.2006.05.018
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    In this article, the actuality of internal and overseas study of Microbial Enhanced Oil Recovery numerical reservoir simulation was analyzed for the sake of further studying of the process of MEOR. At the same time, the author brought forward a series of effective threedimension and threephase mathematical simulation models and solved them by use of finite implicit difference method, and then discussed the approach to gain the parameters. These equations were tested by use of a typical geological model. At the same time, the microbial waterflooding were contrasted and normal waterflooding, then the influence factors (microbe and nutrition concentration, slug structure, interlayer permeability, etc.) and parameter optimization of MEOR were discussed.

    A SUMMARIY OF THE DEVELOPMENT PRESENT SITUATION FOR THE VOLCANICROCK GAS RESERVOIR
    PENG Cai-zhen GUO Ping JIA Min-hui ZHOU Xue-min
    2006, 28(5):  69-72.  DOI: 10.3863/j.issn.1000-2634.2006.05.019
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    According to the successful example of the exploration and exploitation for the volcanic rocks gas reservoir of domestic and overseas. Geologic feature and development characteristic of general volcanic rocks gas reservoir was analyzed and summarized. That is to say, volcanic rocks gas reservoir has numerous rock type, complex rock formation nature, complicated pore structure, special and diversified reservoir space, small porosity and low permeability. The differential of porosity and permeability was big. The reservoir heterogeneity was serious. The containing gas area and effective thickness change a lot. The gaswater distribution is complex. The reservoir is moderate porosity and low permeability double porosity reservoir. It is key to analyze the geologic feature and development characteristic of volcanic rocks reservoir for Shengping Gas field. The yield of Shengping Gas field is steady. The reservoir pressure of Shengping Gas field declined a little. The output of gas well is closely related with fracture. The fracture spacing has an important guide meaning for well position deployment. The incremental production measure and reservoir protective measure of volcanic rocks gas reservoir was presented.

    油气化学工程与化工
    THE EFFECTS OF REACTION CONDITIONS ON THE PROPERTIES OF N-MALEYL CHITOSAN
    JIANG Zhen-ju WANG Zhou-yu HU Xing-qi
    2006, 28(5):  73-76.  DOI: 10.3863/j.issn.1000-2634.2006.05.020
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    The series of water soluble Nmaleyl chitosan has been obtained in an acid homogeneous solution. And it can be to provide the theory basis for the derivatives applied in the oil and other fields. The effects of the mole ratio of anhydride and the amino group of chitosan in feed solution, time of reaction, temperature of reaction and the concentration of acetic acid on of the derivatives solubility, the percent of remains amino(—NH2%)，the intrinsic viscosity (［η］) have been studied respectively. Results have shown that the mole ratio of anhydride to amino group of chitosan in feed is 1∶2, the optimum reaction time is 5 hours, the reaction temperature is 20℃, and the concentration of acetic acid is 1.3% at lest. The chemical structure of the derivatives has been characterized by FTIR and UV spectrum. From the results, chitosan can be selectively acylated .

    APPLICATION OF THE MOLECULAR CONNECTIVITY INDEX ON THE HPLC CAPACITY FACTORS OF ALKYL (1 PHENYLSULFONYL) CYCLOALKANE CARBOXYLATES
    YANG Wei-hua FENG Chang-jun
    2006, 28(5):  77-79.  DOI: 10.3863/j.issn.1000-2634.2006.05.021
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    The molecular connectivity index of twenty eight alkyl (1 phenylsulfonyl) cycloalkane carboxylates is calculated with Matlab. The quantitative structure retention relationship (QSRR) studies have been performed. Through stepwise of multiple regressions, QSRR model has been established. The calculating errors of the model are similar to the experimental ones. The result of leaveone out method indicates that the model is reliable and stable with high prediction quality, such as squared correlation coefficient of LOO of 0.966 and standard deviation of 0.1537. 
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    LAB EXPERIMENT OF USING THE DIATOMITE TO IMPROVING THE LATEX CEMENT SLURRY′S PROPERTIES
    LI Guo GUO Xiao-yang LU Jun-gang ZHENG You-zhi
    2006, 28(5):  80-82.  DOI: 10.3863/j.issn.1000-2634.2006.05.022
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    When preparing the latex-cement by the latex which made in china, usually we mix the additives to prevent the latex separating out and eliminate the system's air bubble. It is difficult to operate on-the-spot because of the problems which needed to pay much attention to when mixing the additives in the latex cement and the additives are very expensive. All the problems bring many difficulties for developing the latex-cement. By the study in the laboratory, we developed that adding some diatomite to the latex cement slurry system could prevent the latex separating out and eliminate the system's air bubble as well. Furthermore, it could improve the compressing and bending strength of the cement stone, decrease the amount of the freedom water and the leaking water, and improve the slurry system's capacity of preventing the gas flee. This way is convenient on-the-spot.
    A NEW CORROSION INHIBITOR FOR GELLED ACID
    DIAO Su PU Wan-fen GUO Qin-pei et al
    2006, 28(5):  83-85.  DOI: 10.3863/j.issn.1000-2634.2006.05.023
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    The corrosion inhibitor is a very important additive in the acid fluid. Aiming at the corrosion of gelled acid to the tubing, casing and well equipment, the inhibiting effect of a series of single corrosion inhibitor have been studied, and a compound corrosion inhibitor NKJ used in high temperature has been developed. The result of the static corrosion experiment indicates that the inhibitor efficiency of the compound corrosion inhibitor is 98.0% in the gelled acid at 90℃ and the concentration of hydrochloric acid in the gelled acid is 20%, and it achieves the third level standard. The result of the dynamic experiment under high temperature and pressure indicates that the average corrosion rate of the corrosion inhibitor is 28.96 g/(m2h), and it achieves the first level standard.

    THE APPLICATION OF BP NERVE NETWORK IN PROFILE ADJUSTMENT EFFECT PREDICTION
    XU Xiao-feng PU Wan-fen Wang Sheng-kui ZHAO Jin-zhou
    2006, 28(5):  86-88.  DOI: 10.3863/j.issn.1000-2634.2006.05.024
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    The basic theory of project design and optimization in profile adjustment is the effect prediction of the project. Through analyzing the influence factor of profile adjustment, the BP network effect prediction model is established and optimized. The BP network effect prediction model proved the prediction model credibility and made designer satisfactory, the BP network effect prediction model can use to predict the effect of profile adjustment measure.
    THE EFFECT OF POLY PHASE EMULSION DROPING AMONG HEAVY OIL O/W EMULSION ON STABILITY
    MENG Jiang XIANG Yang WEI Xiao-li WANG Xiao-shang
    2006, 28(5):  89-92.  DOI: 10.3863/j.issn.1000-2634.2006.05.025
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    Studying on reducing viscosity by emulsifying of Xintan heavy oil of Shenli oilfield, it is found that W/O/W poly phase emulsion dripping will be formed partly while preparing the heavy oil O/W emulsion. The quantity and property of such poly phase emulsion dripping is related to methods of preparing O/W emulsification. As the O/W emulsion is prepared with the pure heavy oil and active water directly, the poly phase emulsion dripping formed is a little. The reason is that the oil water interface film between middle oil phase and external water phase is damaged. It has little effects on the stability of the whole emulsion. However, much more W/O/W poly phase emulsion drippings are formed when preparing O/W emulsion by utilizing the method of phase inversion with high containing water W/O emulsion. It has great effects on the stability of the whole emulsion.
    石油机械工程及其它
    ROLLER BIT TOOTH MEASURED IN THE FORCE EXPERIMENT AND WAVELET DENOISE ANALYSIS
    LI Bin YANG Chun-lei JU Kai-sheng LIU Song-lin
    2006, 28(5):  93-95. 
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    When petroleum well drilling process roller bit broken crag the tooth stress is quite complex. The drill bit service life and tooth stress size has direct correlation. In order to explore the drill bit tooth in broken crag process stress rule, the strength experimental study of the roller bit tooth was made under the laboratory condition. The roller bit tooth had measured the strength experimental study, but the results of the tentative data had the massive noises actually, affected seriously to tentative data processing and the analysis, with the wavelet transform pair tentative data carrying on the chirp processing, obtained the very good result. The massive noises the difficult problem was solved effectively.

    STUDY ON THE SCHEME OF PIPELINE ORIENTATION MEASUREMENT
    XU Wen-hua LIANG Zheng HE Mao-lin LV Zhi-zhong ZHONG Gong-xiang LI Ping
    2006, 28(5):  96-98.  DOI: 10.3863/j.issn.1000-2634.2006.05.027
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    The underground oil and gas pipelines, especially the pipelines under the water, need steady or periodicunsteady position inspection. The traditional method is carried out with GPS and detected apparatus, which results in huge workload and high costs, what is more, it could not reach an expected precision. An orientation project based on inertial device was introduced in the paper. The information of position was stored in the collection system to avoid disturbing by the outside environment; therefore, it increases the system's reliability and definitely decreases the workload and costs.

    ROD, TUBING MECHANISM AND CONTROL TECHNOLOGY
    WANG Huai-ming WU Ji-hui CHEN Xin-min LI Jin-fa CHEN Shao-wei
    2006, 28(5):  99-101.  DOI: 10.3863/j.issn.1000-2634.2006.05.028
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    The wear between the rod and the tubing in wells using the pumping unit has become a serious problem in oilfield. The main reasons for the wear are the well deviation, the string structure, the rodtubing assembly and the unsuitable working system, moreover, the materials of the rod and tube as well as the properties of produced fluids. The mechanism of deviation and wear was studied with the material mechanics theory, and the technical skill and application of deviation and wear prevention methods in Binnan Oil Production Plant were introduced in this paper which will be used for reference on how to improve the exploitation benefits and therecovery efficiency of old oil fields.

    VIRTUAL INSTRUMENT OF DYNAMIC STRAIN MEASUREMENT
    JU Ping-hua QIN Shu-ren WEN Cheng
    2006, 28(5):  102-104.  DOI: 10.3863/j.issn.1000-2634.2006.05.029
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    The signal analysis and process is an important part of Testing Technology. An virtual instrument of dynamic strain measurement and the designing procedure of the signal processing function were discussed in this paper. The result of the experiment tests proved that the function has been realized. The results of the signal analysis is correct and a good engineering application.

    ANALYSIS OF THE UNBALANCED NATURE OF OILFIELD PRODUCTION
    CHEN Wu ZHANG Yun-yun ZHOU Zhong-ping WEN Yan-yuan
    2006, 28(5):  105-108.  DOI: 10.3863/j.issn.1000-2634.2006.05.030
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    In the process of oil field development, there are some disparities between the number of producing wells and crude oil production. With the economics Lorenz curve and Gini coefficient, on the basis of the number of oil production wells and oil production as well as the total percentage, crude oil production was obtained the uneven production index for the production of crude oil in the preparation of plans, Imbalance of crude production, to achieve optimal allocation of oilfield production and oilfield development benefits.