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    20 August 1994, Volume 16 Issue 3
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    石油地质勘探
    Classif ication，Genesis and Significance of Nodular Limestone of Early Silurian in NW Sichuan
    Lan Guang-zhi Zhang Ting-shan Gao Wei-dong
    1994, 16(3):  1-6.  DOI: 10.3863/j.issn.1000-2634.1994.03.001
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    According to the distribution，components and characteristics of the nodular limPStone of early Silurian in NW Sichuan，the authors have divided it into three patterns A,B,C. The nodular limestone of patterns A and B，the formation of which has much to do with the ac-tion of blue一green algae，deposited on shallow ramp ith reefs and bioherms while the nodu-lar limestone of pattern C deposited of deep ramp，the formation of which has close relation with the effect of pressure一dissolution. The nodular limestone of these three patterns in this area has oil一gas bearing quality to
    a certain degree.
    Relationship between Dynamics of Caprocks and Characteristics of Seal
    Yang Chuan-zhong Zhang Xian-pu
    1994, 16(3):  7-13.  DOI: 10.3863/j.issn.1000-2634.1994.03.002
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    According to the rock dynamic analyses of seven different kinds of caproeks in Dianqian-gui area .the authors focus of the relationship between dynamics of caprocks and characteris-tics of seal,and classify the caprocks. In this paper，the authors also analyze the main factorswhich influence the caprock dynamics，and quantitatively evaluate the seal characteristics o6
    carbonate.mud and gypsolith.
    Applications of Organic Inclusions to Carbonate-type Oil/gas Source Rocks
    Qin Jian-xiong
    1994, 16(3):  14-21.  DOI: 10.3863/j.issn.1000-2634.1994.03.003
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    Based of the ersearch of carbonate-type oil/gas source rocks from lower Permain in Xi-chang Basin, lower Ordovician in Ordos Basin，and lower Carboniferous in Majiaoba,Jiangy-ou, the author in this paper finds that organic inclusions could be formed in deck stage of the thermal evolution of oil/gas source rocks. Organic inclusions are the primary samples for hy-
    drocarbon matter in oil/gas source rocks，and thus embody all sorts of events and informa-tion associated with hydrocarbon matter occurring in the thermal evolution of carbonate一type oil or gas source rocks. Therefore，in the evolution of oil/gas souce rocks，the inclusion's types，characteristics，paleo一temperature，quantity,composition, and some oth-er parameters will offer an effective approach towards the study of (1) the thermal evolution
    degree and matueity stage of oil/gas source rocks;(2) sedimentary basin paleo一tenperature and the thermal evolution history of oil source rocks;(3) the regional distribution and divi-sion of organic matter maturity in oil/gas rocks;(4) assessment.of oil/gas resource abun-dance;and (5) the nature and origination of oil/gas source rocks.
    Reservoirs Pores Evolution under the Control of Diagenesis and Stage
    Mu Shu-guang Zhang Yi-ming
    1994, 16(3):  22-27.  DOI: 10.3863/j.issn.1000-2634.1994.03.004
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    Clastic rock reservoirs pores evolution is affected by organic-inorganic diagenesis. At the' buried diagenesis stages，the important cause for high Porosity and permeability in deep-buried reservoirs is the secondary pores produced by the corrosion of calcite and feldspar from the process of the dehydroxylation of organic acid in thermal evolution. With the in-crease of buried depth，diagenesis stagds will experience an evolution from early to late phas-es，and organic matter from non-maturity to maturity. Meanwhile，the reservoirs pores will also undergo an evolution from decline to re-growth. In the same ,basin, if the reser- voirs in different beds possess the same buried depth，their diagenesis phases and pores evo-
    lution will be the same. Otherwise，even the reservoirs in the same beds will have different diaginesis phases and pores evolution.
    Application of MicroseismicReserve-permeate Phases in Prediction of Favourable Belt in Limestone Layer
    Zhu Shi-jun
    1994, 16(3):  28-33.  DOI: 10.3863/j.issn.1000-2634.1994.03.005
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    Based on the study of sedimentary facies and diagenesis，the characteristics and distribu-tion of favourable reserve-permeate belt in limestone layer can be determined through the analysis of microseismic phases of the belt as well as the interpretation of drilling，geology and logging. Through the discussion of the microseismic phases of Fu Cheng Zhai's and Shuang Jia Ba's T:-‘container constructions in the east of Sichuan Province，the paper tried to prove the effectiveness of the application of microseismic_ phases in the prediction of favourable reserve一permeate belt in limestone layer.
    油气田开发
    Development and Application of Drilling Engineers Aide System
    Zhang Yi-ping Sun Biao Liu Bin
    1994, 16(3):  34-38.  DOI: 10.3863/j.issn.1000-2634.1994.03.006
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    This paper presents a software system for drilling engineering-the drilling engineersaide，and briefly discusses the structure and functions of the systemwhich has been sucess-fully applied inthe oilfields.



    Diameters and Distribution of Water Droplets in Air Drilling
    Huang Jin-jun Cui Mao-rong
    1994, 16(3):  39-43.  DOI: 10.3863/j.issn.1000-2634.1994.03.007
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    Having discussed the method of Calculating the size of water droplets and analyzed the factors affecting it，we found that the relative velocity of gas and liquid phase，the interfical tension of the liquid,and the liquid content in air fluid are important factors affecting the di-ameters and distribution of water droplets.
    Flow Rate Analysis of a Horizontal Well
    Guo Da-li
    1994, 16(3):  44-49.  DOI: 10.3863/j.issn.1000-2634.1994.03.008
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    In this paper we studied the two一dimensional steady state flow problem of a horizontal well in a reservoir with bottom water or edge water, and obtained the flow rate formula of a horizontal well by using mirror image superposition principle of the potential function. We also discussed the effects of the thickness and permeability anisotropy of a reservoir, and the
    distance between edge water and well, on the productivity of the horizontal well.
    石油机械工程
    The vertical Interaction Model of cone Bit Teeth-rock
    Zhou De-sheng Ma De-kun Hou Ji-kang
    1994, 16(3):  50-54.  DOI: 10.3863/j.issn.1000-2634.1994.03.009
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    The simulation model of cone bit teeth-rock is one of the major problems in cone bit-rock interaction simulation. Based on the mechanics of rock failure and the characteristics of cone bit-rock interaction，a model has been set up in this paper to simulate the vertical in-teraction between cone bit teeth and rock. Furtheranore，hardness，plastic coefficient and e-lastic coefficient have also been introduced in this model to describe the rock nature in cone bit teeth-rock interaction so as to enlarge the application of this simulation model.
    The Optimization Design of the Pipe-in-Pipe Combinationunder the Deep Layer
    Dong Shi-er Zhang Wen-wei Zhang Xian-pu
    1994, 16(3):  55-64.  DOI: 10.3863/j.issn.1000-2634.1994.03.010
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    Oil production is often greatly affected by the collapse of well casings under the super-high pressure of the soft rock under deep layer，Aiming of this，the authors in this paper base their discussion on the thick tube theory in the elasticity mechanics and the optimization theory and put forward a new approach towards the optimization design of the pipe-in-pipe combination to resist the super-high pressure of the soft rock under deep layer.
    A Practical Method to determine the Fatique Cracking Constants of Sucker Rods
    Song Yu Zhang Xiao-yu
    1994, 16(3):  65-70.  DOI: 10.3863/j.issn.1000-2634.1994.03.011
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    In accordance with the statistic characteristics of fatique cracking, a practical method has been put forward in this paper to deternxine fatique cracking constants of sucker rods.The constants deduced from this method are correlative with sucker rod survival probability,hence corresponding to the results from other metheds. The distribution law of fatique
    cracking lifetime of sucker rods and the correlativity betweem C and m are slso tentatively discussed and tested in this paper.
    The Design of Large Analogy Unit in Testing Tri-axis Stress on Rock
    Wang De-yu Wang Tian-geng Wu Yong-min
    1994, 16(3):  71-75.  DOI: 10.3863/j.issn.1000-2634.1994.03.012
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    The large analogy unit in testing tri-axis stress on rock is an essential equipment that can be used to have an analog study on the mechanical characteristics of the rock in deep un-derground. So far there have been no such units on sale in market. Through the discussion
    of both the necessity and possibility on the unit，the paper offers a much newer，simpler and more economical approach to the design of the unit.

    Tentative Researches in the Design Criteria of a tapered Rod String in a Straight well
    Hu Yong-quan
    1994, 16(3):  76-83.  DOI: 10.3863/j.issn.1000-2634.1994.03.013
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    The oilfield practice proves that in middle and later oil production periods，or in the ex-ploitation of deep，low一permeability reservoirs，it is an effective way to enhance oil recov-ery by incerasing the pump setting, depth. In the paper，the modified formula of calculating the pseudo一static load in a conventional straight well are applied to the calculation of the deep pumping load，and a theoretical modeling is derived for tapered rod string design in a
    deep well by the application of modefied Goodman stress diagram. The coresspounding com-puter program is worked out in FORTRAN and the calculating results are obtained of 35Mnp and 40 CrMo steel sucker rods under different parameter coordinates. A rod string de-sign criterion is perfected by the analysis of these results in deep well production with pump-ing units.
    Grey Reliability Design for the. Structure of Composite Pipeline
    Cheng Jing-hua Song Dong-yu XiaoFang-chun
    1994, 16(3):  84-87.  DOI: 10.3863/j.issn.1000-2634.1994.03.014
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    In this paper，a design method-of the structVre of carbon-fibre composite gas pipeline is introduced by combining reliability theory and grey system theory with optiraization tech-piques，and taking account of the influences of white,grey and random factors on oil or gas pipeline optimum desien.
    Stress Field around an Axial kunning Crack in a Cylindrical Shell
    Zhang Qing-yuan Xiao Fang-chun
    1994, 16(3):  88-96.  DOI: 10.3863/j.issn.1000-2634.1994.03.015
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    Using Fourier-integral transform technique，the paper studies the solution problem of the stress field around an axial moving crack with constant velocity in a cylindrical shell and obtains a small parameter solution of the stress field around crack tip. The result shows that the trength of the stress field around crack tip varies with crack propagation velocity，while
    angular distribution of the stress field does not. Moreover，when crack moving velocity ar-rives a a certain value，branchy phenomena well be found in the running cracks.
    石油化学工程
    The Effect of Desulfurizing Condensate Gasoline by the Solutizer一extraction Method
    Xu Rong Yang Lin Yin Dai-yi Zhou Wen-yong
    1994, 16(3):  97-100.  DOI: 10.3863/j.issn.1000-2634.1994.03.016
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    A laboratory research has been made on the desulfurization of sulfur一bearing conden-sate gasoline，which is produced from Lei San gas reservoir in NW Sochuan. Having alkali prewashed at normal temperature and atmospheric pressure., the sulfur一bearing gasoline is extracted by solutizer一lye，thus the total content of sulfur in the gasoline can be reduced
    from above 6000 mg/L to below 800 mg/L. An economic and feasible way has been found for reducing the total content of sulfur of high sulfur一bearing gasoline，and the quality of oil products can be improved.
    The Study of Acid Sludges in Acid Stimulation Treatment
    Huang Zhi-yu He Yan Liang Xi-mei
    1994, 16(3):  101-104.  DOI: 10.3863/j.issn.1000-2634.1994.03.017
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    Through, the observation of the acid sludges formation in qualitative tests and the inves-tigation of the effect of acid concentration and iron(Ⅲ )content on sludge一forming as well as that of the prevention-of sludge一forming with mutual solvents in quantitative tests，the au-thors in this paper find that the quantity of sludges formed will increase together with acid
    concentration and the spent acid will produce a relatively smaller amount of acid sludges than initial acid. They also find the presense of iron(Ⅲ )will reinforce the sludge一forming ten-dencies，but a certain amount of mutual sol_vents(ethyleneglycol dibutylether) in acid will be effective in decreasing the quantity of acid aludges. Accordingly, some approaches have beem
    put forward to prevent the formation of acid sludges.
    The Treatment of Gas Field Sewage from Low Temperature Station
    Xi Jian Du Wei-domg
    1994, 16(3):  105-110.  DOI: 10.3863/j.issn.1000-2634.1994.03.018
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    Based on the investigation and analysis of gas field sewage from low temperature sta-lion，a treatment process as well as its conditions has been determined in this paper to coagu-late gas field sewage and oxidize H202/ FeE+. Furthermore，factors affecting the treatment。have also been discussed in this paper. The results of the experiment have demonstrated itseffectiveness in particular of the treatment for organically contaminated gas field sewage.
    基础研究
    Global Weak Solution of a Class of NonlinearS-Bq Type Equation System
    Hu Yue Jiang Xiao-tao
    1994, 16(3):  111-116.  DOI: 10.3863/j.issn.1000-2634.1994.03.019
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    In this paper we consider the initial-boundary value problem of a class of nonlinear Schrodinger-Boussinesq type equation system，and prove the existence of the global weak solution of the problem by the Galerkin method.
    Researches on Input Modes of Training Samples of Backp ropagation Algorithm of Neural Networks Applied to Classifying Three Basic Wave Modes
    Hu Ze Wu Lin Chen Wei
    1994, 16(3):  117-122.  DOI: 10.3863/j.issn.1000-2634.1994.03.020
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    In order to further research the properties of neural networks when their BP algorithm is used in mode classification，this paper proposes four ways of offering training samples to multi一layer neural networks, and makes a comparison between them. The results show that the better ways are random input mode and partial input mode，therefore the input mod-
    es of traing samples have direct influence on the properties of neural network
    Stability of Partial variables for Nonlinear Continuous Neural Networks
    Jian Ji-gui Peng Yong-qing
    1994, 16(3):  123-128.  DOI: 10.3863/j.issn.1000-2634.1994.03.021
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    In this paper，we use Liapunov stability theory to deal with the global asymptotic stabil-ity with respect to partial, variables of equilibrium points of the following nonlinear continu-ous neural networks and obtain some sufficient con-ditions.

    基础学科
    Analysis of Magnetization Technique and Its Application in Oilfield
    Wang Ping-quan
    1994, 16(3):  129-134.  DOI: 10.3863/j.issn.1000-2634.1994.03.022
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    This paper presents a summary of analysis of magnetization technique at home and abroad and its application in oilfield. It gives the basic conception of magnetization and lays stress on the mechanism，researches and application of magnetization theatment technique in various areas.