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    20 April 2004, Volume 26 Issue 2
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    地质勘探
    RESEARCH ON THE INTEGRATION PLOT FOR BORE-HOLE PATH AND STRATIGRAPHIC SECTION AND LOG-GING CURVE
    FAN Xiang-yu XIA Hong-quan CHEN Ping et al.
    2004, 26(2):  1-3.  DOI: 10.3863/j.issn.1000-2634.2004.02.001
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    Based on the mathematical theory of analytical geometry of three dimensions and computer graphics, the paper does some im-portant research on the integration plot forwell track and stratigraph-ic section and borehole log.Aset of application program compiled by VB6.0 language has been successfully applied to realize the integra-tion plot and bring outthe three-dimensional contact relation between well track and formation visually. Meanwhile, the plot has endued the well track with 3D geologic information and logging information.Through the interpretation for substantive practical material, it
    proves that the program is useful and 3D visualization plot powerful.
    The conclusion of the study offers researcher some effectual help to carry out geologic parameter interpretation and geosteering of wire-line logging or logging while drilling for horizontal well and high an-gle deviated hole.
    FAULTS FEATURE AND HYDROCARBON ACCUMULA-TION IN SLOPE ZONE IN BIYANG DEPRESSION
    LI Lian-sheng; ZHU Jun LI Hui et al.
    2004, 26(2):  4-6.  DOI: 10.3863/j.issn.1000-2634.2004.02.002
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    The slope zone of Biyang depression developed many faults and has complicated faults system. This paper pointed out that main fault’s scale and continuity and arrangement relationship with sand-body distribution and axial direction of the nose structure control the hydrocarbon migration and pool type and accumulation and enrich-ment through studying on feature of faults system and hydrocarbon accumulation in slope zone of Biyang depression. The second hydro-carbon Exploration is very successful based on these study.

    THIN LAYER DIVISION AND CONTRAST OF THE SHAXI STRUCTURE N1-N12OIL RESERVOIR
    CHENG Xin-ling;MU Zhong-hai;MALi-ning;et al.
    2004, 26(2):  7-10.  DOI: 10.3863/j.issn.1000-2634.2004.02.003
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    Thin layer division and contrast is the foundation for the en-forcement of oil field development scheme,but general method of thin layer division and contrast have certain limitation. To surmount this defect,this paper have applied a new method to carry out thin layer division and contrast. This method is according to the view-point of Sequence Stratigraphy, on the basis of thicker sequence di-vision, with the Parasequence methods, Parasequence group meth-ods, isotime methods and slice methods and so on to carry out the thin layer division and contrast for shaxi structure N1-N12oil reser-
    voir. According to the contrast result of oil-water relation and thin layer division, with this method of integration analysis, it is practi-cal and feasible to carry out thin layer division and contrast.
    石油与天然气工程
    THE MODELLING AND APPLICATION OF PLANNING MEASUREMENT AND STRUCTURE OPTIMATION OF OILFIELD PRODUCTION
    XIE Xian-jun LIUZhi-bin DUYu-hong et al.
    2004, 26(2):  11-14.  DOI: 10.3863/j.issn.1000-2634.2004.02.004
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    The correlative relationship of the development index of oilfield can be established by use of functional simulation theory(such as differential simulation method and NN method), the authors re-searched the oilfield(oil production plant or development unit) and set up the optimal models of measure structure with different goals,including maximum measure oil-output(fixed measure workload ,fixed measure cost);minimum measure cost(fixed measure oil-out-put,fixed measure workload) and maximum economic benefit(fixed measure workload, fixed measure oil-output, fixed measure cost),
    which solved the optimal structure problems successfully with each subentry measure oil-output (usually contained fracture oil-output、acidification oil-output、overhaul oil-output、other measure oil-output and so on) and the corresponding measure workload and other de-velopment index of oilfield (or oil production plant). The satisfacto-ry economic benefit can be obtained that applied the models into de-velopment programming in some oilfield, which was in the mid-late stage.
    EXPERIMENT STUDY OF LONGITUDINAL METAL FLOW OF SOLID EXPANDABLE TUBULAR
    ZHANG Jian-bing SHI Tai-he XU Qian et al.
    2004, 26(2):  15-17.  DOI: 10.3863/j.issn.1000-2634.2004.02.005
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    Longitudinal metal flowof solid expandable tubularwas studied according to stimulant mechanical environment of borehole in this paper. The 35CrMomaterial pipe was selected to be tested. Meshed experiment was adopted to study the plastic deformation of metal. The results of the test and analysiswere indicated the metal flowwas non-uniform on the longitudinal direction of tubular. The results of metallographic examination have proved that the results of meshed experiment is correct, it is concluded that meshed experiment can be used to research the oilfield tubular goods.

    RESEARCH ON THE CHANGE LAWS OF THE OIL-POOL PHYSICAL PROPERTY IN THE PROCESS OF THE WATER FLOODING IN THE OILFIELD
    BAO Xiang-sheng YIN Cheng FU Zhi-guo et al.
    2004, 26(2):  18-21.  DOI: 10.3863/j.issn.1000-2634.2004.02.006
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    The water flooding in the oilfield can cause the change of not only reservoir fluid saturation, but also reservoir temperature and pressure. These variations pose the different influences on the seis-mic velocity, and can be reflected on the time-lapse seismic profile.For analyzing and discussing the alone or integrated variety laws that temperature, pressure and saturation of water function cause, this paper makes full use of the Biot-Gassmann equation, and combine the other experiential formulas to get the volume modulus of fluid and the elastic modulus of rock. Throughthe study of the variety law of the velocity of sandstone strata of Bohai oilfield, its results will help us to acknowledge the time-lapse seismic monitoring technique,and improve the ability of recognizing the oil-pool’s change of the time-lapse monitoring in the area.
    A SCREENING CANDIDATE RESERVOIR FOR GAS IN-JECTION WAY BASED ON CHARACTERISTIC PARAME-TER’S COMPREHENSIVE WEIGHT OPTIMIZATIONMETHOD
    XIONG Yu XIONG Yu-bin CHEN Tian-gang
    2004, 26(2):  22-25.  DOI: 10.3863/j.issn.1000-2634.2004.02.007
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    Several parameters have been screen out for evaluating affection of gas miscible and immiscible injection based on studying all factors affecting displacement behavior. Ranks and distribution functions,as well as point models of each factor collected from application ex-ample in literature have also been presented in paper. A characteris-tic parameter’s comprehensive weight optimization method for screening candidate oil reservoir for gas injection has been built up by introducing Fuzzy Analytical Hierarchy Process and Integrated Weighting Point Process. Application in three practical reservoirs in-dicates it is a successfulway of combining two sides of subjective af-fection to evaluating and objective suitability for gas injection. Inte-
    grated evaluation results by using this way given in the paper can give right potentiality and orderfor all candidate oil reservoirs forgas injection.
    THE EFFECTS OF WELL TRAJECTORY AND AZIMUTH ON SAND PRODUCTION OF BARE WELL COMPLETION FORMATION
    LIUXiang-jun HE Xiang-qin LUO Ping-ya et al.
    2004, 26(2):  26-28.  DOI: 10.3863/j.issn.1000-2634.2004.02.008
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    The effects ofwell trajectory and azimuth on sand production of bare well completion formation have been studied quantitatively in this paper with a commercial finite element software and Equivalent Plastic Strain. The results show that both the maximal plastic strain and the plastic area increase with well angle that ranges from 0 o to 45°at given in-situ stress and formation. The sand production in-creases too. The maximal plastic strain decreases with well angle that ranges from 45°to 90°, and the sand production decreases too.The plastic zone changes with well azimuth, even though well angle is same. It is better for sand control that Well, especially horizontal well drilling should be along with in-situ horizontal stress.
    A PROBE OF SHALLOW TERTIARY GAS FORMATION PRODUCTION LAW IN LU LIANG AND BAO SHAN BASIN, YUN NAN PROVINCE
    WANG Nen-fan
    2004, 26(2):  29-33.  DOI: 10.3863/j.issn.1000-2634.2004.02.009
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    Shallow gas formation production law is probed by taking the shallow Tertiary gas formation production as example, as well as combining the experiences of shallow gas formation production from home and abroad, to guide the production correspondingly. Gener-ally, the shallow gas formations are of smaller size, lower gas col-umn, loose pay zone and water production; in production, the reservoirs have a very shorttime inwithoutwater production and stable production, and they are easy to produce water and sands, the
    production law clearly differs frommiddle-deepwhole package structure gas reservoirs. Aimed at“the three-low characteristics”(lowdaily output, lowgas production rate and lowgas recovery), quick-er water production easier well bore liquids accumulation and sands production, the principle is put forward to improve well pattern and avoid continuously stimulating gas well.
    ACCELERATED PRESSURE CONDITION ANALYSIS,CONDUCTED THE ADJUSTMENT AND POTENTIAL DIG-GING OF ULTRA-HIGH WATER PERIOD RESERVOIR
    LI Guang-quan CUI Hong-xia YIN Wen-jun et al.
    2004, 26(2):  34-37.  DOI: 10.3863/j.issn.1000-2634.2004.02.010
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    Shengtuo oilfield have expoited more than 30 years, the anisotropism of interlayer and innerlayer is very serious and the ad-justment and potential’s digging is very difficult. The potential area of the anisotropic reservoir often distributed in the low-pressure-lev-el-layer, analysis the potential area of reservoir from the pressure is a new attempt. Based on the analysis of pressure condition of unit 83-5 in second zone of shengtuo oilfield, conductthe adjustment and potential’s digging ofUltra-highwater period reservoir, sum up sev-eral conclusion and suggestions, these conclusion and suggestions
    have taken good effect on the practice of exploitation of Ultra-high water period reservoir. This article has reference value of the ex-ploitation of Ultra-high water period reservoir.
    WELL TEST ANALYSIS OF SLUG FLOW IN COMPOSITE RESERVOIRS OF LOW-VELOCITY NON-DARCY FLUID FLOW
    JANG Wei-jun JIA Yong-lu LIU Chang-yin et al.
    2004, 26(2):  38-41.  DOI: 10.3863/j.issn.1000-2634.2004.02.011
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    Based on the low-velocity non-darcy fluid flowtheory in porou media of Non-Open flowwells in composite reservoirs, the effective wellbore radial model of this kind ofwell testwas derived, the solution of this model was gotten in Laplace space with Laplace transfor mation and special physical equations theory, then the real space solution was gotten by convenient Stehfest’s numerical Laplace revers transformation. The new type curve of the model was also obtained.The model described in this paper can be used for slug well tes
    analysis in low permeability reservoirs.
    油气化学工程与化工
    RESEARCH PROGRESS OF CO2CORROSION IN OIL/GAS FIELD EXPLOITATION
    LI Chun-fu WANG Bin ZHANG Ying et al.
    2004, 26(2):  42-46.  DOI: 10.3863/j.issn.1000-2634.2004.02.012
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    This paper summarized the existing forms and influencing fac-
    tors of CO2corrosion in oil/gas field exploitation. The mechanism of
    different corrosions was also analyzed. A viewpoint of supercritical
    corrosion toward the characters and corrosion facts of CO2in the su-
    percritical condition was presented in the paper.
    石油与天然气工程
    A NEW METHOD ON ANALYZING THE STABILITY OFFOAM DRILLING FLUIDS
    LI Xiao-ming PU Xiao-lin LUO Xing-shu et al.
    2004, 26(2):  47-49.  DOI: 10.3863/j.issn.1000-2634.2004.02.013
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    The most important factor for evaluating the capability of foam drilling mud is the foam stability, that is the foam half-life. Currently the most common method used to determine the foam half-life is the conventional measuring cylinder method which is simple and convenient. However, the disadvantages are artificial errors and it can not be recorded the foam decay process. To overcome such a limitation, a newmethod has been used to evaluate the foam stability. An apparatuswhich is calledMA-2000 Turbi Scan has been used
    to analyze the foam stability. The measurement is more advanced and accurate and is controlled by a computer operating automatically. The analyzing results are two curves exported by computer. From the curves we can observe clearly the foam decay process and numerate the foam half-life.
    油气化学工程与化工
    STUDY ON ACID LEAK-OFF IN NATURALLY-FRAC-TURED RESERVOIRS
    LI Yong-ming Guo Jian-chun ZHAO Jing-zhou et al.
    2004, 26(2):  50-53.  DOI: 10.3863/j.issn.1000-2634.2004.02.014
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    When acid fluids flow in artificial fractures, some larger pores or natural fractures are dissolved by acid to enlarge into wormholes so that acid mainly leaks through wormholes. Therefore, it must be considered the effects of acidizingwormholes on acid leak-off in naturally-fractured reservoirs. Based on the characteristics of acid flowing in naturally-fractured reservoirs, the model of acidizingwormhole growth, the model of acid flowing and reaction inwormholes and the model of acid flowing in the matrix are developed. The computing
    method of acid leak-offwith the effects of acidizingwormholes is put forward. The effects of net fracture pressure, wormhole population and acid viscosity to wormhole growth and acid leak-off are studied by case calculation that has important meanings for controlling the leak-off of acid fracturing
    石油与天然气工程
    SYNTHESIS AND SCALE INHIBITION PROPERTY OF ACRYLIC ACID AND SODIUM ALLYL SULFONATE COPOLYMER
    WU Yan YANG Xu.
    2004, 26(2):  54-56.  DOI: 10.3863/j.issn.1000-2634.2004.02.015
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    Acrylic acid (AA) and sodium allyl-sulfonate (SAS) have been used to synthesize a solid scale inhibitor. The relationships between the inhibition function and monomer ratio, initiator concentration, copolymer amount added, Ca2+concentration, temperature and time of the solution have been studied in laboratory. Results have shown that the scale inhibitor has a good effect on reducing scale of CaCO3.
    油气化学工程与化工
    SYNTHESIS AND PROPERTIES OF THERMOSTABLE FI TRATE LOSS REDUCER: PAX
    XU Juan HUANG Jin-jun LI Chun-xia et al.
    2004, 26(2):  57-59.  DOI: 10.3863/j.issn.1000-2634.2004.02.016
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    A newstyle thermostable binary copolymer filtrate loss reducer-PAX, has been synthesized by 2-acryloyl-2-methyl-propylsulfonate (AMPS) and acryamide (AM) under a redox system. Results have been shown that PAX possesses good effect on reducing fluid loss under 220℃and saturated brine media.
    A WATER-SOLUBLE HYDROPHOBICALLY ASSOCIATING COPOLYMERS: SYNTHESIS AND CHARACTERIZATION
    TANFang ZHAO Guang-yong JIA Zhao-xia et al.
    2004, 26(2):  60-63.  DOI: 10.3863/j.issn.1000-2634.2004.02.017
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    A series of water-soluble hydrophobically associating copolymers AM/AMPS/ C16DMAAC have been synthesized in aqueous solution by redox initiation polymerization. The effect of all kinds of condition on the yield and [η] of the copolymer have been studied,and screened out the optimum reaction conditions by lots of experiments in laboratory. At the same time, the different influences,such as polymer concentration, reaction temperature, added elec-
    trolyte, and shear rate on the properties have been discussed.
    STUDY AND APPLICATION OF LOW DAMAGE RATARD-ED ACID IN LOW PERMEABILITY SANDSTONE RESER-VOIR
    YAO Yi-ming ZHAIYi XING De-gang et al.
    2004, 26(2):  64-66.  DOI: 10.3863/j.issn.1000-2634.2004.02.018
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    Hydraulic fracturing has been unsuccessful because of coal-bed and soft formation in Baolang Oilfield. A new type retarded acid with low damage has been studied, which is aimed at the formation characteristics of high detritus content, more filling substance in porous, small pore and throat radius and high impurity substance in the pore and throat in low porosity and permeability reservoir. Results by experiment has shown thatthe retarded acid is of high corro-sion capacity to rock, low reaction velocity and interface tension,high anti-emulation and breaker effect, easy to discharge from the formation. It has been proved that it is a newtechnique for exploitation of Baolang low permeability reservoir.
    LABORATORY RESEARCH OF ALCOHOL TREATMENT TO RETARD WATER BLOCKAGE EFFCET IN LOW PERMEABILITY GAS RESERVIOR
    ZHAO Dong-ming ZHENG Wei-shi LIU Yi-fei et al.
    2004, 26(2):  67-69.  DOI: 10.3863/j.issn.1000-2634.2004.02.019
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    Water blockage is a ubiquitous problem during the development of lowpermeability gas reservoirs. In orderto improve the gas effec-tive permeability of low-permeability gas reservoirs, alcohol has been
    used in controlling water blockage. Based on the indoor experiments, the mechanism of alcohol treatment has been studied and the application effect of several alcohol solutions has been evaluated and compared. Result shows that damage caused by water blockage in low permeability gas reservoirs can be effectively retarded by the alcohol treatment.
    石油机械工程及其它
    HIGH PRESSURE WATER JET COMBINE WITH CUTTER CLEANING JAMMED OIL PIPES
    XU Yi-ji ZHAO Fu-guo CHEN Hong-dao et al.
    2004, 26(2):  70-73.  DOI: 10.3863/j.issn.1000-2634.2004.02.020
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    It frequently occurs during exploitation in some oilfields thatthe oil pipes were jammed by cement slurry. The jammed pipes were usually discarded as useless, which caused a big loss of economy.Based on systematically studyingthe flowlawand dynamic properties of high pressure water jet, the mechanism of rock cutting with hy-draulic and mechanical method was analyzed in detail, water jet parameters were adjusted accordingto conditions and applications, furthermore, the cutters and the nozzles were suitably locate d in the bit. A new technology to cleaning jammed oil pipes with high pres-
    sure water jet was presented in the paper, and that special cleaning
    equipment and tools were worked and turned out. The technology is a great breakthrough in field.

    RESEARCH AND APPLICATION OF LONG-DISTANCE OIL TRANSPORTATION PIPELINE CLEANING
    LIUYu-wei MIAO Jian-chen .
    2004, 26(2):  74-76.  DOI: 10.3863/j.issn.1000-2634.2004.02.021
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    In this paper the types of fouling in Bian-yang long-distance oil transportation pipelinewere analyzed, alsothe components of chemical cleaning liquidwere discussed according to the cleaningmethod.The result of lab experiment indicated that low concentration inorganic acid-hydrochloric acid possess the good cleaning ability to the fouling, acid concentration and cleaning temperature greatly influenced on cleaning result, and adding the oxidant to clean-out system can effectively control the harmful gas-hydrogen sulfide to be produced.
    FAULT TREE OF LONG TRANSPORTATION PIPELINE AND COUNTERMEASURE OF PIPELINE RELIABILITY GROWTH
    WANGWei-shuen JIANG Da-xu.
    2004, 26(2):  77-79.  DOI: 10.3863/j.issn.1000-2634.2004.02.024
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    The natural gas ismainlytransported and sold through long distance, so that the reliability of long transport pipeline has an important effect on the natural gas market. In this paper, the main factors of which affect the pipeline reliabilitywas analyzed, and some countermeasure and improvement for making pipeline reliability growth was put up, it has a certain reference value for pipeline manager.
    石油经济管理
    THE STUDY ON ECONOMIC LIMITATION ANALYSIS FOR OIL WELL OUTPUT ENHANCEMENT
    CHEN Wu CHEN GUAN-hai WANG Li et al.
    2004, 26(2):  80-81.  DOI: 10.3863/j.issn.1000-2634.2004.02.023
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    In the middle-late stages of production, as the deepening of the oil field development, the marginal operation output decrease, the cost increases, and the investment increase, too. Through the analysis of the laws of the marginal operation output decreasing, the cost increasing, and the investment increasing in the middle - late stages, the operational cost is looked upon as a re-investment, by means of input and output analysis and economic limitation output calculation, the analytical model of oilwell output enhancement lim-
    itation is worked out taking single well output enhancement as example, which provides alternations to economic effect analysis and shut down time of oil well production in the middle-late stages.
    DISCUSSION OF THE RECOVERY OF RESIDUE VALUE OF THE FIXED ASSETS
    LIU Bin YI Wei-rong SHONG Yu-lin .
    2004, 26(2):  82-84.  DOI: 10.3863/j.issn.1000-2634.2004.02.024
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    In Economic Evaluation, the residue value of the fixed asset was that the net value of the fixed assets flowed into the cash flow as cash recovery at the end of the evaluation term. Because of different kinds of fixed asset investment (singular or progressing), and different terms of evaluation (generally ranges from 6 to 15 years), the recovery of the residue value of the fixed asset may influence the final result of the economic evaluation greatly, even change the conclusion on the feasibility of the project. This article discussed the approaches dealing with the residue value of fixed assets based on the economic evaluation on different development plans of different types of investment and evaluation terms.