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    20 November 1994, Volume 16 Issue 4
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    地质勘探
    A Seismically Stratigraphical Study of the Cambrian Xixangchi Group in Moxi-longnusi Area
    Kuang Wen-zhong Yin Cheng Ye Li
    1994, 16(4):  1-6.  DOI: 10.3863/j.issn.1000-2634.1994.04.001
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    By means of amplitude,continuous property and velocity of seismic wave,the authors in this paper try to classify microseismic facies of the Cambrian Xisangchi Group in MoxiLongnusi Area both in the conventional seismic section snd G-log section,Together with the comprehensive study of logging,geology,microseismic facies as well as forward modeling,they also analyse the most profitable microseismic facies of the weathering shell that may keep oil and gas in this area,thus reinforcing the seismically stratigraphical study of the weathering shell of lower Paleozoic group along Leshan-Longnusi Paleo-uplift.

    The Primary Study and Seismic Interpretation of Paleo-Hammock and Its Control Over the oil and Gas Reservoir of Xiangqi Group in Central Sichuan-South Sichuan Transitional Belt
    Zhu Shijun Huang Jixang Li Xianyong Yue Hong
    1994, 16(4):  7-10.  DOI: 10.3863/j.issn.1000-2634.1994.04.002
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    There are several paleo-hammocks on the erosional surface of Leikoupo Formation in the Central Sichuan-South Sichuan transitional belt.The Xiangqi reservoir may have been originally tilted and edged out as the result of the sedimentation and differential compaction,which may cause to develop small-scale faults and differential compaction fractures,and is helpful to form the space for travel,trap and reservoir in the overlaid beds.Therefore we can predict the existence of the promising reservoir belt in Xiangqi Group beds by looking for the Paleo-hammocks on the erosional surface of the LeikouPo Formation，which has been tested and verified.

    A Method of Determining the Index Weight in Quantitative Assessment of Hydrocarbon-Bearing Characteristics in Gas-Bearing Reservoir
    Xu Feng-yin Zhu Xing-shan Yan Qi-bing Li Shi-lun
    1994, 16(4):  11-17.  DOI: 10.3863/j.issn.1000-2634.1994.04.003
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    Weight determination is a puzzle subject in the comprehensive assessment of the objective characteristics of things,and has not been solved so far.Taking as an example the comprehensive assessment of gas-bearing bed of carbonate rock,and using the method of grey relational anAlysis,this paper has successfully solved the problem of weight determination in fuzzy comprehensive assessment.With this achievment the comprehensive assessment can be made to be more in consistent with the objective reality and a good way also be provided for the wide use of the comprehensive assessment.
    Tectonic Features in Bayanhot Basin and Preliminary Evaluation of its Oil Potential
    Liu Xue-feng
    1994, 16(4):  18-27.  DOI: 10.3863/j.issn.1000-2634.1994.04.004
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    A compound basin superimposed on Alxa Massif,Bayanhot Basin can be divided into 5 first units and 12 second units of tectonics that form 5 tectono-stratigraphic assemblies in the basin.Faults are the main factor in the formation and evolution of the basin.With the features of listric fault,Bayanwula Shan Fault controls the formation of the western depression belts.with its active intensity declining from north to south.Yinan Fault Belt controls the formation of Yihe depression,with the most active intensity in its middle Part.Chahan Fault is astrike-sliP fault with an obvious sinistral movement.The struetural style found in the basin includes imbrieated thrust zone，trapdoor strueture，drag fold，listric fault，rollover antieline，horst-graben strueture and the like.As the main oil-bearing bed in the basin，the Carboniferous system in the eastern and southerrn depression zones is provided with good trap conditions，thus possessing afavourable oil and gas potential.

    油气田开发
    Graphic Cut of Arbitrary Polygon
    Mu Zhong-hai Wang Xin-quan
    1994, 16(4):  28-32.  DOI: 10.3863/j.issn.1000-2634.1994.04.005
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    This paper first studies the graphic outer and inner cut by convex polygon,then the graphic cut by arbitrary polygon.Its application of compiler program proves to be satisfactory。
    Theoretical and Experimental Study of Well Cementing
    Zheng Yong-gang Hao Jun-fang
    1994, 16(4):  33-39.  DOI: 10.3863/j.issn.1000-2634.1994.04.006
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    This paper studies the displacement theory of laminar and turbulent cementing and the action mechanics of turbulent spacer in detail,and presents the mathematical models of laminar and turbulent cementing displacements in vertical,deviated and horizontal wells.By solving the turbulence diffusion equations in annulus, the paper obtains the formulas of calculating the minimum volume of the spacer and the minimum turbulent contacting time, and examines the partial theoretical formulas by using experimental data and those from other papers.It has been shown that the relative error is about 10℅.
    Research of Dehydration Process of Methylene Blue
    Huang Lin-ji
    1994, 16(4):  40-46.  DOI: 10.3863/j.issn.1000-2634.1994.04.007
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    Through the analysis of the methylene blue agent in differential thermal balance,the author in this paper observes that below 121℃ the dehydration process of both absorbed water and crystal water in the agent are carried out in two steps,and above 121℃ there occurs the degradation of the thermal oxidation.After a comparative study of four temperatures in dehydration,the author further suggests that the constant weight of the sample in 120±3℃ is an ideal condition to produce waterless methylene blue,and the thermo-analysis curve is the basis to direetly determine the moisture content of the sample.The method is simple and convenient，with a good reapearance and a relatively quiek and accurate elimination of the disturbance of the thermaloxidation. The author also diseusses the calibration of the formula for API balance sample.


    A New Method of Measuring Imbibition Curves
    Pei Bai-lin Pen Ke-zhong;Huang Ai-bing
    1994, 16(4):  47-50.  DOI: 10.3863/j.issn.1000-2634.1994.04.008
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    In view of the great errors in the measurment of imbibition curves,this paper presents a new method of improving the accuracy of the measurement of imbibition curves,and also in troduces its principle,experiment and data analysis.

    Effect of Mud Filter invasion on Permeability and Resistivity of Rock
    Zhang Kai-hong Chen Yi-jian
    1994, 16(4):  51-55.  DOI: 10.3863/j.issn.1000-2634.1994.04.009
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    The evaluation of the formation damage caused by mud filter invasion is a fundamental study to protect reservoir in well completion techniques.The authors in this paper make use of the multi-pressure differential and resistivity core measurement system to carry out an experiment on the simulation of the mud filter invasion with Jurassic cores from West China Oilfield.The results obtained,e.g.the relations between invasion length ,damage length,damage degree as well as the changes of oil saturation, thus offer some valuable models both in theory and Practice.

    Theoretical Study of Optimum Turbing String for Water Drainage -Oil Recovery
    Yang Hua Yang Chuan-dong
    1994, 16(4):  56-65.  DOI: 10.3863/j.issn.1000-2634.1994.04.010
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    This paper describes the principle of optimized tubing string for water drainage-oil recovery technology.Using the basic gas equation,particle mechanics and breaking mechanics of liqrid drop,we derive a mathematical model for continuous water drainage of a gas well and draw the solution nomograph as well.The research achievements are of great significance in increasing the ultimate recovery ratio.

    石油机械工程
    Application of Energy Law for Rock Drillability in Oil Fields
    Du Lian Yang Shi-liang
    1994, 16(4):  66-73.  DOI: 10.3863/j.issn.1000-2634.1994.04.011
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    Through an introduction to the application of the energy law for rock drillability in oil.fields,the paper determines the applied extent of its index Kn for lithology of the formation and proves a much easier and better response of the index Kn to the true drillability changes in the well, The prediction of the drilling velocity thus obtained can almost be identical with the true one.

    The Fuzzy Cluster Analysis of Formation for the Bit Selection
    Zhou De-sheng Xia Yu-wen
    1994, 16(4):  74-78.  DOI: 10.3863/j.issn.1000-2634.1994.04.012
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    In this paper,the fuzzy cluster analysis method is used to discuss the classification of formations under some of their lithologies.17 kinds of formation having been used to illustrate,their fuzzy contain matrix is set up and their classification diagram is drawn.The bit selection is discussed according to the lithologies of the formation drilled.


    Similitude Design of Spherical Blowout Preventer
    Wu Kai-song
    1994, 16(4):  79-83.  DOI: 10.3863/j.issn.1000-2634.1994.04.013
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    In order to solve some difficult problems in the design of spherical BOP,the author in this paper uses the similitude method to analyse and study the phenomena of rubber core deformation of spherical BOP,and offers the similitude design criteria of spherical BOP.While testing the NL Shaffer s spherical BOP series,he also finds that the design parameters of their preventers from low to high pressure conform to the similitude design criteria.Therefore,the similitude criteria can be applied not only in the design and manufacture of the new type but also in the design of the higher pressure of the same type.

    Top Tension Analysis of Offshore Drilling Riser
    Li Hua-gui Wu Jing-ze
    1994, 16(4):  84-90.  DOI: 10.3863/j.issn.1000-2634.1994.04.014
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    Riser system is one of the major equipments in offshore drilling.This paper simplifies the four-order nonlinear partial differential equation and the boundary conditions describing the marine riser motion,and numerically simulates the nonlinear dynamic analysis by using a finite-difference method.Then the top tension on the drilling riser is studied in four sea states and the corresponding counting programs are made.The results obtained through the calculation of different pratical examples prove to be identical with those by stress Engineering service Inc.U.S.A.The top tension analysis method and the counting programs in this paper prove to be simple，accurate and time-saving，thus they are of practical use in the design and check of the drilling riser system.
    化学工程
    A Study of Sulfanated Hydroxyl Group Nonionic Surfactant
    Yin Zhong
    1994, 16(4):  91-96.  DOI: 10.3863/j.issn.1000-2634.1994.04.015
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    The paper focuses on the reaction conditions for the synthesis of sulfanated anionic surfactant from amidosulfonic acid.The conditions involve the factors of time,temperature,molecular proportion and catalyst.The results obtained suggest that amidosulfonic acid is an ideal sulfanation agent,and the suitable conditions for synthetic reaction can be further determined through a comprehensive analysis of the results.

    The Measurement of MixedSolution of Alkylbenzene-Sulfonate and Polyaerylamide
    Xu Hai-ying
    1994, 16(4):  97-101.  DOI: 10.3863/j.issn.1000-2634.1994.04.016
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    In this paper the double-wavelength ultraviolet method and the benzalkonium broturbidometry method are used to analyze eaeheomponent，coneentration of the mixed solu of alkylbenzene-sulfonateandpolery lamide astoreduee the measurement distur due to the interaetion of the eomponentsby normal analysis method.First，the dou wavelength ultraviolet methode aneliminate the obstruetion of PAManddeter mine the eentration of ABS，by using the difference of light absorbane.
    Study of the Regeneration Method of Solutizer-lye Used for Desulfurizing Condensate Gasoline in Northwest Sichuan
    Yang Lin Xu Rong Zhou Wen-yong Yin dai-yi
    1994, 16(4):  102-104.  DOI: 10.3863/j.issn.1000-2634.1994.04.017
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    Based on a study of desulfurizing the condensate gasoline in Northwest Sichuan by means of solutizer-lye extraction,the paper presents a regeneration method of solutizerlye。

    The Application of Dispersant(SXY)for Oil-well Cemention on Tu-Ha Oilfield
    Chen Fu
    1994, 16(4):  105-110.  DOI: 10.3863/j.issn.1000-2634.1994.04.018
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    In this paper,the effects of SXY on rheological property and free water have been studied in connection with the cement operation of Tu-Ha oilfield.The compatible experiments f SXY with other cement addictives have been made.It proves that SXY is an effective and anti-temperature dispersant of cementing slurry.


    基础科学
    Mecessary and Sufficient Condition About Solvability of Wheeler-De Witt Equation with Symmetrical Coupled Scalar Field
    Wu Xiao-qing
    1994, 16(4):  111-118.  DOI: 10.3863/j.issn.1000-2634.1994.04.019
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    This paper deals with Wheeler-De Witt equation with symmetrical coupled scalar field and satisfied by universe wave function,reveals the relation between the valuation of fuzzy parameter p and the exact physical solution of the equation,and obtains the necessary and sufficient condition about the solvability and the expression of the solution.


    The Review and Approach of the SWPI Campus Layout and Designing
    Li Ren-chuan Dong Bao-zhen
    1994, 16(4):  119-125.  DOI: 10.3863/j.issn.1000-2634.1994.04.020
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    This paper gives a general review of the construction work of the SWPI campus in the past 35 pears since the founding of the institute,particularly.the construction process before and after the primary design of the campus extension project and the implementation of the campus overal plan.It also gives an analysis of the successes and failures in the campus layout programming,and makes a helpful approach to the future campus layout and designing,presention a few constructive proposals.