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    20 April 1994, Volume 16 Issue 2
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    地质勘探
    Diagenesis and Porsity Evolution of Carbonate Rocks of the Lower Triassic at Chenhu-Tuditang，Central Hubei Province，China
    Dong Zhao-xiang Chen Jing-shan Shen Zhao-guo Fang Shao-xian Chen Jin-ren Liu Lingshan
    1994, 16(2):  4-14.  DOI: 10.3863/j.issn.1000-2634.1994.02.02
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    The depositional environments are mainly semi-and complete restricted carbonate and locally evaporate platforms in the early Triassic, and micrite, dolomicrite, and a little of grain-stone and anhydrite in the lower Triassic. Such a formation has experienced dolomitization in the submarine, solution in the meteoric, cementation, corrosion, dolomitization in the hurried environment, and corrosion in the epidiagene environment. The pores and fractures formed in the meteoricand shallow hurried environment are filled with calciter. The solution pores and structural fractures made with the deep hurried environment are approximately synchronous with the oil-gas evolution. Two kinds of reservoirs of' the lower Triassic at Chenhu-Tuditang belong to the fracture reservoir and the fracture-cave reservoir. The porosity of the former is only about 2%一3%，and it is lower than that of the latter. With aporosity of more than 26%,the latter is still affected by the air and. water, hence poor on the preservation of oil and gas.

    Investigation of a Key Factor in the Control of Industrial Oil Well Distribution of DA' AN Zhai Member in Chuanzhong Jinhuaxi-Xiangshan structure
    Li Yao-hua
    1994, 16(2):  16-21.  DOI: 10.3863/j.issn.1000-2634.1994.02.03
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    Based on the theoritical study of gravity-flow sediment as well as that of sections and reservoirs，the author in this paper concludes that grain-flow elastic shell limestone reservoirs of gravity-flow sediments are an important factor in the control of oil and gas distribution. Accordingly，sublacustrine fan model of gravity-flow sediment is set up to decide the favorable exploitation regions.

    稠油开采
    Study of Recovery Law of steam Injection in Thin Thickness Heavy Oil Reservoir
    Hu Chang-zhong Liu Xin-fu
    1994, 16(2):  22-28.  DOI: 10.3863/j.issn.1000-2634.1994.02.04
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    The analysis of the production data of Jinglou Oilfield of Henan and one of its pilot-areas, Opilot，reveals the recovery law of cyclic steam simulation and steam flooding in thin thickness heavy oil reservoir: While the vertical displacement is efficient and the recovery rate and percentage are high, the oil production rate per well, cyclic oil production and oil-steam ration are low, and oil production declines fast.

    Numerical Simulation And the Prediction of Single-Well Steam Flooding Production Change
    Hu Tao
    1994, 16(2):  29-33.  DOI: 10.3863/j.issn.1000-2634.1994.02.05
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    In steam flooding production，it is very important in heavy oil production to base on practical production the estimation of production change and the determination of cyclic steam phase, steam injection state and oil well production velocity so that a rational production method can be obtained and oil recovery ratio increased. The paper employs numerical simulation method to discuss the problem and gives out the results of the calculation.

    石油工程
    Dynamic Analysis of Horizontal Well Pressure
    Li Xiao-ping Zhao Bi-rong Wu Xiao-qing Liu Qi-guo
    1994, 16(2):  34-40.  DOI: 10.3863/j.issn.1000-2634.1994.02.06
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    This paper establishes the percolation mathematical models of a homogeneous anisotropic reservoir horizontal well in or without consideration of wellbore storage and skin effect. After the solution of the mathematical models have been obtained by using characteristic function ,finite integral transforms, Laplace transforms, and other methods, the pressure and pressure derivative type curve is drawn that is suitable for the horizontal well testing analysis，by using numerical integral and numerical inversion methods. The approximative expression also derived of early and late pressure drop of the horizontal well testing analysis.

    A New Method of Predicting Productivity Sand Production of Horizontal Wells
    Li Bin-yuan Sun Ai-yin Liu Shu-zhi
    1994, 16(2):  41-47.  DOI: 10.3863/j.issn.1000-2634.1994.02.07
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    This paper presents a numerical method of solving the partial differential equation that describes flowing law of horizontal wells, by which the idealized productivity of a horizontal well can be computed after the pressure profile and three dimensional velocity have been acquired at each node. In addition，a sand concentration profile model in flowing liquid has been established, which can predict sand production of a well that might produce sand.

    The Design Method of The Strength Of The Casing Strings In A Viscous Oil Horizontal Well
    Liu Kun-fang Luo Shi-ying
    1994, 16(2):  48-54.  DOI: 10.3863/j.issn.1000-2634.1994.02.08
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    the casing design of viscous oil horizontal well is quite different from that of conventional well. This paper introduces a method of calculating the thermal stress on the casing stings of a viscous oil horizontal well, benging load, friction resistance. This paper also introduces the method of designing maximum load of the casing strings of a horizontal well on the basis of above calculations, and its application in the design of Leng Ping Well 1, Liao He oilfield.

    Study And Application of The Method Of Processing The Waste Water Into Medium-Density Salt-Water Well Control Fluid
    Zhao Pu-chun
    1994, 16(2):  56-60.  DOI: 10.3863/j.issn.1000-2634.1994.02.09
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    This paper presents a method of processing the waste water into clean salt—water well control fluid at the density of 1.0 1.4 g/cm, and the application of this well control fluid. Experimental measurement and field application show that it is a high-grade and harmless fluid the use of which can be expanded.

    Diagnostic Instrument of Pump Jack
    Huang Han-guang Chai Man-zhou Chu Wan-quan
    1994, 16(2):  61-66.  DOI: 10.3863/j.issn.1000-2634.1994.02.10
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    The testing diagnostic instrument is characterized by its adrers applications，mobile and frequent operations. In the light of these characteristics, this paper discusses the structure and the design principle of the diagnostic instrument with 80 C 31 single chip computer as its core. The problems，such as low reliability，high price and difficult operation of the original instrument have been solved.

    The Criterion “C” Formula Determing Wellbore Solidity and Its Application
    Xiong You-ming Pan Yin-de
    1994, 16(2):  67-73.  DOI: 10.3863/j.issn.1000-2634.1994.02.11
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    The paper has developed criterion "C" formula determining the solidity of the wellbore rock of vertical，horizontal and inclined wells，analyzed the parameters that influence the formula，and discussed its application in the selection of well completion methods. In addition, some useful conclusions have been made.

    石油机械工程及其它
    Study on Jet Nozzle Mechanism and Its Hydraulic Performance
    Xiong Ji-you Liao Rong-qing Chen De-jie
    1994, 16(2):  74-78.  DOI: 10.3863/j.issn.1000-2634.1994.02.12
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    On the basis of the investigation of advanced jet mechanism，this paper analyzes the mechanism of pulsed jet nozzle and the relation of its power to hydraulic energy, and derives the calculation formula. The result shows that the power obtained from the instantaneous high frequency jet of pulsed nozzle to be 2. 558 times as great as that of the low-frequency jet, and 1.438 times as great as that of continuous jet .Moreover, the calculation formulas of hydraulic power and impulsive force are derived, which presents the theoretical basis for the application and further study of pulsed jet nozzle.

    Development and Application of the Signal Analysis Software About Pulse Jet
    Wang Jia-song Liao Rong-qing
    1994, 16(2):  79-83.  DOI: 10.3863/j.issn.1000-2634.1994.02.13
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    In order to have an immediate，comprehensive and reliable quantitative analysis of the test signal of the dynamic pressure，a signal analysis software (XHFX)has recently been developed. The application of XHFX will obtain a correct evaluation of the waveform feature，frequency structure and energy distribution, and some other similar complex signals as well.

    Application of Signal Analyzer in the Development of the New Drill Pump
    Meng Kun-liu Zhang Wan-fu Zhang Ming-hong Zhang Zheng-quan Chen Yuan-canZhang Mi
    1994, 16(2):  84-89.  DOI: 10.3863/j.issn.1000-2634.1994.02.14
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    Based on the synthetic measuring system of performance parameter of drill pump，the QLSA FFT is cooperatively developed by SWPI and South Sichuan Oil Field. With a Chinese instruction and window display, the FFT possesses better functions and can be operated easily. Authors in this paper have introduced some. results about measured performance parameter with the QLSA FFT.

    Blackboard Model of Problem-Solving for Engineering Analysis Expert System
    Chen Wei-Cheng Sui min Hu Ze Zhang Gong-she
    1994, 16(2):  90-96.  DOI: 10.3863/j.issn.1000-2634.1994.02.15
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    A problem-solving model is a scheme to organize inference steps and domain knowledge in constructing a solution to a problem. Based on blackboard model, the design method in this paper are those of engineering analysis expert system, including hierarchical representation of expert strategic knowledge，completion of depth-first search and reasoning network model，construction of hierarchical reasoning network model for cooperative mufti-expert system, design of interpretation scheme and interface, and reasoning algorithm.

    Viscoelastic-plastic Finite Element Mechanics Models of Interaction of Rock，Cement Ring and Casing
    Lian Zhang-hua Zhang Xian-pu Zhao Guo-zheng He Ming-zhu Wang Gang Zeng Jiu-chang
    1994, 16(2):  97-103.  DOI: 10.3863/j.issn.1000-2634.1994.02.16
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    The paper has first established the viscoelastic-plastic finite element mechanics models of casing deformation. Theory and practice have proved that the mechanics model III is accurate and reliable. The mechanics model, a new method to study casing deformation, can study the process of casing elastoplastic deformatiom under uniform or non-uniform load acting on the outer wall of casing. While applied in Huabei Oil Field, the model III has imitated the casing around outer load and its distribution, hence providing important reference data for solving the casing around stresses and finding the method of resisting casing deformation.

    The Application of CAD in the Design of Cone Bit
    Lin Yu-long
    1994, 16(2):  104-109.  DOI: 10.3863/j.issn.1000-2634.1994.02.17
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    The paper introduces the application of Computer Aided Design (CAD) in the design of cone bit. In this paper，Whole software，is given With its principle，its features and its working method .Based on the geometry and kinematics of cone bit，and designed in FORTRAN77. The software make some reasonable borrowings from AUTOCAD software so as to meet the needs of designing and drawing. The software can be used conveniently in the designing and calculation of cone bit and this is now still in a leading position in China

    油气化学工程与化工
    K-cycle Ending Criterion In Equilibrium Calculation Rich Natural Gas Phase
    Yin Dai-yi
    1994, 16(2):  110-114.  DOI: 10.3863/j.issn.1000-2634.1994.02.18
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    In the research of the phase state of natural gas，the ending criterion of the K-cycle in calculation of equlibrium constant ki used to adopt; It has proved through calculations that the ending criterion using |En+1/En-1|≤σ is right.

    Exergy Analysis of Heat-Exchange Process of Heat-Exchanger
    Chen Ji-fu
    1994, 16(2):  115-122.  DOI: 10.3863/j.issn.1000-2634.1994.02.19
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    Through the exergy analysis of heat-exchange process, the author in this paper has derived the calculation formilae of exergy low(ΔE) & exergy efficiency under the circumstances of cosidering heat exergy low and flow exergy low simultaneoraly. the results show that there is a possible esistence of the limit point ofΔE. when load of heat-exchanger (Q)is constant. To make use of exergy of heat-exchanger as much as possible，the diameter of heat-exchanger and the flow rate of cold & heat fluid should be appropriately matched.
    Action Mechanism of Eliminating Smoke and Saving Energy Additives for Fuel Oil
    Tang Xiao-dong Xu Rong
    1994, 16(2):  123-129.  DOI: 10.3863/j.issn.1000-2634.1994.02.20
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    Through the analysis of the chemical reaction mechanisms of fuel oil burning in a combustion chamber of an engine ,authors in this paper find the relationships between the. reaction mechanism and exhaust air pollution caused by automobiles and saving fuel oil，and descuriobe the action mechanisms of major eliminating smoke and saving energy additives used in our country .They also put forward a standpoint that the atomic state of some function elements can function in the formation of charcoal smoke by the catalytic hydrogenation borore within these additives. Further more，they also introduce their own production of the action mechanisms of the fuel oil saving energy agent.

    数学
    Random Pseudo—Metric Collection Spaces And Random Topologcal Spaces
    Liu Ming-xue
    1994, 16(2):  130-137.  DOI: 10.3863/j.issn.1000-2634.1994.02.21
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    This paper introduces the concepts of the random pseudo—metric collection space and the random topolobical space，Studies the relations between the random pseudo—metric collection space and the probabilistic pseudo—metric collection space，and constructs ordinary topoloby and random topoloby in the random pseudo—metric collection space.