Journal of Southwest Petroleum University(Science & Technology Edition)

SEDIMENTARY HISTORY AND ITS EFFECT ON HYDROCARBONACCUMULATION FROM LATER PERMIAN TO MIDDLE TRIASSIC IN SICHUAN BASIN

Wen Ying-chu Qiang Zi -tong Wang Yi-gang

1991, 13(3): 1-8. DOI: 10.3863/j.issn.1000-2634.1991.03.001

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A mega-complex shallowing-upward sequence, ranging from deep ramp
carbonates, open platform carbonates to restricted platform carbonates and evaporates, was formed in Sichuan region during the ingression from Dongwu Movement(Later Permian)through Yinzhi Movement(Middle Triassic).Pe-trological and geochemical studies of the reservoir showed that the multiple migration of hydrocarbon, dominantly liquid before Cretaceous and gaseous after Neogene, occured during the thermal一evolution of hydrocarbon .The multiple migration resulted in the mixing and accumulation of noncognate gaseous hydrocarbon in the upper part of the mega-complex sequence.They were finally sealed by evaporates, as seen in the gas reservoirs discovered .So more exploration will be significant in the salt-bearing basins of Later Permian一Midle Triassic in Sichuan basin.

REFLECTION COEFFICIENT OF ELASTIC LONGITUDINAL WAVE IN LEVEL LAYERED MEDIA

Lei Xiao Yi Zong-fu DuSheng-ming

1991, 13(3): 9-14. DOI: 10.3863/j.issn.1000-2634.1991.03.001

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The formula for calculating the reflection coefficient of elastic longitudinal
wave in level layered media is given in this paper.The steps and program
frame for calculation are proposed .And an example is given.

CHINESE CHARACTERIZATION FOR SIERRA GEOPHYSICAL PACKAGE

Xu Hua Chen Kang Tang Jianren

1991, 13(3): 15-20. DOI: 10.3863/j.issn.1000-2634.1991.03.003

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Sierra geophysical system is a powerful software package for oil geophysical
prospecting .In this paper，the detailed techniques and the software structure of Chinese characterization for Sierra system are presented .The key modules modified in Sierra system in order to display Chinese characters are described.Fanally, the evaluation of and comparison between the Sierra and the Chinese Sierra are made

GEOCHEMISTRY ON ENERGY OF EARTH MOON AND METEORITES

Hong Qing-yu

1991, 13(3): 21-28. DOI: 10.3863/j.issn.1000-2634.1991.03.004

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In the very long process of the development and evolution of the earth, the laws of changes in q and μ′_nare the results of the combined geological functions of inner and outer powers, and are the power leading to the earth s differentiation. The changes in q and μ′_non the moon are not so great, which is caused by the very long chemical stagnation and by lacking the combined geological functions of inner and outer powers. The formation of meteorites and their series follows the law that their crystal lattic proper order, just the same as the crystallization of magma on the earth,The variety of q and u'.mirrors the heterogeneityof meteorites' composition coming from the minor planet belt,The functional relation of 82 .23 is tenable to the earth, the moon and meteorites, which indicates the identity of their generating from original solar nebula and the simultaneity as the independent members of the solar system .The difference of q and u'a may reflect the heterogeneity of original solar nebula.

ANALYSIS OF MATHEMATICAL MODELS FOR PARTICLE BLOCKING ANDFILTRATION INVADING FORMATIONS

Zhang Ning-sheng

1991, 13(3): 29-37. DOI: 10.3863/j.issn.1000-2634.1991.03.005

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Based on the analysis of the mechanism of particle blocking and filtration
nvading the pores of the formation, this paper made a research into the
mathematical models for particle blocking and filtration invading formations
ander static and dynamic conditions of one- and two-dimensions, which is
also checked by experiments in labs.

DEVELOPMENT OF OIL RESERVOIR SIMULATION WORKSTATION ON MICROCOMPUTER

Zhang Da-shu

1991, 13(3): 38-47. DOI: 10.3863/j.issn.1000-2634.1991.03.006

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An oil reservoir simulation workstation on microcomputer has been de-veloped，whose structure, characters and performancespaper.are stated in this Paper. Some important techniques for the pretreatment and after-treatment modules are analyzed,And the mathematical model for the simulator and itsappliable algorithm(a new effective algorithm for a large set of sparse matrix equations-oil field is -“Orthomin")are illustrated.The practical application in an demonstrated and the prospects of the workstations wide applica-lion are pointed out at the end of the paper.

MATHEMATICAL MODEL FOR WELL TESTING WITH SKIN AND WELLBORE STORAGE IN A CIRCULAR CLOSED RESERVOIR

Jia Yun-l u

1991, 13(3): 48-52. DOI: 10.3863/j.issn.1000-2634.1991.03.007

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This paper suggested a mathematical model for well testing with skin
and wellbore storage in a circular closed reservoir, and gave out a solution in Laplace space according to Laplace transform method.Using Stehfest's method for numerical inversion of Laplace transform，we can get the solution in real space easily_These results have been used in our well testing software,

ANALYSIS OF PROSPECTS OF APPLICATION OF JET PUMPS IN THE DEVELOPMENT OF SICHUAN OIL AND GAS FIELD

Meng Kuen-liu Pan Yia-jia Wu Kai-shong

1991, 13(3): 53-59. DOI: 10.3863/j.issn.1000-2634.1991.03.008

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This paper describes the structure, principle and performance curves of
jet pumps，introduces several typical examples in which jet pumps are recently applied in production at home and abroad, According to what is mentioned above, the paper also analyzes special technical characteristics of jet pumps and their pumping systems comprehensively, Since the structure of jet pumps is simple, compact and strong，and the principle is new and effective, jet pumps are thought to have such advantages as wide use; long service life and convenient maintenance, It is a valuable thing to study the application of jet pumps in the development of Sichuan oil and gas field.

CALCULATION OF VALUE-RELIABILITY IN OIL-GAS PIPELINE

Yong Qi-dong Xiao Fang-chun

1991, 13(3): 60-67. DOI: 10.3863/j.issn.1000-2634.1991.03.009

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Coupling theoretical calculation method in Value Engineering with stru-ctural reliability, this paper has come up with formulas of function-cost in oil-gas pipeline, t.e, value-reliable equations, which are called value-reliable calculation.The characteristic of this method is that if the material and its reliability are given, the cost of pipeline can be directly calculated from loads, Therefore, it is also of certain value for reference because economy combines with technique in this method.

SUPER HARD TOOL MATERIAL CBN AND ITS APPLICATION

Liu Qing-you Chen Liang-hao

1991, 13(3): 68-73. DOI: 10.3863/j.issn.1000-2634.1991.03.010

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In this paper the constitutional structure and specific cutting performance of a new type of the super hard tool material(CBN)is introduced and tom- pared with diamond, The application of grinding wheels of CBN to grinding hard gears is taken for example, It has been shown that CBN has better ma-chining properties and good application prospects in precise processing and super precise processing, Meanwhile, the problems to be solved in practical application are also pointed out,

USING MODIFIED NEVILLE EXTRAPOLATION TO INCREASE STRESS ACCURACY OF FINITE ELEMENT METHOD FOR DYNAMIC RESPONSE

Zhang Ru-qing Dong Shi-er

1991, 13(3): 74-81. DOI: 10.3863/j.issn.1000-2634.1991.03.011

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For dynamic response, especially when frequence is high, the stress ae-
curacy obtained by the finite element method is very low. This question hasn' t been solved theoretically, To solve it, this paper extends Neville extrapolation from one-dimension to multi-dimension, Accordind to numerical characteristics of dynamic response, "outside approach" and "inside approach" are put for-ward, and Neville extrapolation can be used in the finite element method to increase the dynamic stress accuracy.

APPLICATION OF DATA PROCESSING TO SCIENTIFIC&TECHNOLOGICAL CALCU-LATION IN PETROLEUM INDUSTRY

Zhang Lei Liu Jian-yi

1991, 13(3): 82-89. DOI: 10.3863/j.issn.1000-2634.1991.03.012

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According to the principle of least square method，a more general-purpose software of data processing is programmed in this paper, the experimental data and calculation results can be regressed with the software, Then, fitted curve can be drawn out based on this regressed equation on corresponding
plotter,

EXISTENCE AND NONEXISTENCE OF GLOBALLY SMOOTH SOLUTION TO THERMALLY INSULATED GAS DYNAMICS EQUATIONS

Guo Da-li Li Cai-zhong

1991, 13(3): 90-100. DOI: 10.3863/j.issn.1000-2634.1991.03.013

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In this paper, we have studied Cauchy problem for the thermally insulated gas dynamics equations in Lagrange coordinate，and have proved three theorems on the existence and nonexistence of globally smooth solutions to the above problem.

DERIVATION OF SPⁿ HYBRIDIZED ORBITAL WAVEFUNCTION

Zhao Yong-peng Yin Zhong

1991, 13(3): 101-107. DOI: 10.3863/j.issn.1000-2634.1991.03.014

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A treatment of deriving the SPⁿ hybridized orbital wavefunction is put
forward in this paper,Reasonable postulation has been made for the modulus of the SP0 hybridized orbital space vector, and the vector has been projected onto three dimensions, so that the wavefunction can be rapidly obtained.

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