Journal of Southwest Petroleum University(Science & Technology Edition)

The pool-formed Rule of Natural Gas and Diagenesis of Carboniferous Reservoir in East Sichuan

Guo Yihua

1994, 16(1): 1-10. DOI: 10.3863/j.issn.1000-2634.1994.01.001

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The author in this paper concentrates on the evolution of porosity and the diagenesis of Carboniferous Reservoir in East Sichuan. Using the enclosures in diagenetic minerals, he tries to prove that (1)the natural gas is gradually accumulated at the end of Jurassic after Yanshan Movement and (2)the degree of accumulation of natural gas is controlled by the effect of the thermally evolution of source rocks,the diagenesis and porosity evolution, the structural trap,and the migration of oil and gas.

Late paleozoic Deep Water Biofacies of SW China

Gao Weidong Zhang Tingshan

1994, 16(1): 11-16. DOI: 10.3863/j.issn.1000-2634.1994.01.002

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During the Late paleozoic, SW China was located at the passive continental margin of South China plate. From Middle to Late Devonian,a series of NW and NE rift(with the dominant orientation of NW)occurred to East Yunnan, South Guizhou and the whole Guangxi province,thus forming grabens and horsts. This topographic feature then developed into interplatform rough and isolated platform framework. Generally,tLe deep water environment of this area can be influenced by gravity flow and is much different from the subdeep water interplatform trough and inherited deep water interplatform trough respectively.

Deconvolution for Unknown Mixed-phase pulse

Yi Zongfu Zhou Huaxing

1994, 16(1): 17-22. DOI: 10.3863/j.issn.1000-2634.1994.01.003

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Based on an unknown mixed-phase pulse deconvolution proposed by Huang Xiaojing,an improved deconvolution method is presented in this paper. Compared with Huang s decomvolution,this method possesses the advantages of (1)less operation and (2)a better deconvolution effect for the seismic wavelet compression.

Study of Mechanism of Oil Reservoir Sand Production

Li Binyuan

1994, 16(1): 23-27. DOI: 10.3863/j.issn.1000-2634.1994.01.004

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Basing oil the analysis of the sand stress,this paper discusses the effect of gravity, Van der Waals force and repelling force of double electrical layer on sand production,and presents the concept of threshold flow velocity of reservoir sand production. It is of practical significance to rational determination of oil well productivity and reservoir protection.

Study of The Method of Measuring and Calculating Porosity and Pore Volume Compressibility of Rock Under The Reservoir Conditions

Yuan Xingbai Yi Ming Chen Liping

1994, 16(1): 28-34. DOI: 10.3863/j.issn.1000-2634.1994.01.005

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This paper analyses the relation of the variation of reservoir rock pore volume, porosity and compressibility with the effetive overburden pressure,and basing on the polynomials regreasion of rock experimental data,it presents the calculating. equations of rock porosity,mean and instaneous pore volume compressibility under the reservoir condition. The practical applieation of these equations to processsingrock testing date of Zhongyuan,Xinjing,and Sichuan oiifields proves that. this method is precise and convenient for calculation.

The Rules of Bed-Load Cuttings Trandport in Horizontal Well

Wang Yanhui Luo pingya

1994, 16(1): 35-41. DOI: 10.3863/j.issn.1000-2634.1994.01.006

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In turbulent flow of horizontal annulus,the cuttings bed is a concentrated fluid with special constitutive featrues. Starting from the mechanism and physical model of shared cuttings transport, the constitutive relationship and velocity field of bed-load cuttings transport are established through the study of the energy transfer and equilibrium of the microscopic motions of bed-load particles. From these equations,the critical hydraulies of cuttings motion into static beds, the maximum thickness of bed-load cutting layer,and that the transport of bed-load cuttings increases greatly flow resistance.

Study on the Selection of Horizontal Well Completion Methods

Panyingde Xiong Youming

1994, 16(1): 42-49. DOI: 10.3863/j.issn.1000-2634.1994.01.007

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The paper dicusses the factors of geology, drilling, and production engineering, which need to be considered in the selection of horizontal well completion methods. The authors introduce the calculating methods for the strong level of formation rock and the borehole stability. Finally, the flowchart for the selection of horizontal well completion methods has been obtained and some examples have also been provided.

Early Distinguishing of Types of Condensats Gas Reservoir

Zhang Siyong Xu Jiaqong Liu Huanzhong

1994, 16(1): 50-54. DOI: 10.3863/j.issn.1000-2634.1994.01.008

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This paper presents a Grey system model of early distinquishing of types of condensats gas reservoir, and has applied this model to checking thirty condensate gas reservoirs,the rate of success being 96.7%. Practice has proved that Grey system has the advantages of high precision and rate, and needs fewer original data, which are easy to obtain, thus is more accurete than the traditional experiment method and experiential method.

The Fem Analysis of the Bearng Ability of the well casing Under the Condition of Rock Being Broken up by High Energy Gas

Wu Yongmimg Dong Shier

1994, 16(1): 55-59. DOI: 10.3863/j.issn.1000-2634.1994.01.009

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The existing high energy gas frauring technology can efficiently break up arenaceous rock above 1000 meters,and raise the yields of the oil and gas. Bat it can not efficiently bresk up the carbonate rock under 1500 meters. the main reason lies in the unknown besting ability of the well casing,and the worry that wells woul collapse as the pressure rises. In this paper,FEM is used to d fine the limit pressure under 1500 meters,under which the well casing would not break.

Optimun Relation Curve of A and N in dA/dN Calculation

Zhang Xiaoyu Song Yu

1994, 16(1): 60-67. DOI: 10.3863/j.issn.1000-2634.1994.01.010

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Using orthogonal polynomial regression method analyze the possible relation cuves of A and N,and compare the results with different regression powers in dA/dN calculation,this paper determines the optimun relation curve of A and N.

Computer Design Method and Seftware Reinforced Columns

Xiong Shulin

1994, 16(1): 68-75. DOI: 10.3863/j.issn.1000-2634.1994.01.011

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Reinforced celumns, a member commonly used in architectural projects,are various in type and complicated in design. Manual calculation takes time and is easy to make errors.Having studied quite a number of computer design methods of reinforced columns,this paper presents a software CDP programmed for design,which not only can calculate the quantity of the reinforce ments to be needed in different types of columns,but can also select longitudial reinforcements and stirrups automatically,and draw their cross sections.

Laboratory Study of Cooperative Effect on Foaming Performanced of Binary surfactant Blending System

Xu Rong Shen Wei Yang Lin

1994, 16(1): 76-81. DOI: 10.3863/j.issn.1000-2634.1994.01.012

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A laboratory study of cooperative effect on foaming performance of binary surfactant blending system is made in this Paper. Four surfactants with better foaming properties in cooperation with a main foaming agent (SX-1) are picked out from 12 different sorts of surfactants. The foaming performance of those binary blending systems is determined simultaneourly in the presence of inorganic salts. After comprehensive surveying the foamability and foam stability,the best binaty surfactant blending system, SX-1 and SAS,has certain practical significance in the exploitation of oil and gas fields,and in surfactant industry.

Computer Simulation of Particle Movement in Porous Media

Met Wenrong Deng Chuanguang

1994, 16(1): 82-87. DOI: 10.3863/j.issn.1000-2634.1994.01.013

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Based on the substitution of network model for real porous media, this paper applies Monte-Carlo method to the study of the mechanism of particle migration/deposition in network model and of the effects of particle concentration and particle size distribution in permeability reduction of porous media. The method presented in this paper is not only suitable for the mechanism study of particle movement/deposition, but also for the research in some other fields.

The Test Data Communication Between HP Data Acquisition System and IBM Computer

Yao Fujiu Xu JingGuang

1994, 16(1): 88-96. DOI: 10.3863/j.issn.1000-2634.1994.01.014

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HP computer data acquisition system is in the leading position in the world in capacity, quality and reliability, but as a result of its incompatibility with IBM computer, its ues is limited to some degree. This problem has been settled successfully in this paper by the data communication. By the use of this method, the test data can be easily communicated frem HP computer to IBM computer,and saved in disk. Thus the scope of the application of the data squisited though HP system has extended.

Estimation of Time Delay Based on Matrix Rank Recealing QR Factorization

Tang Bin

1994, 16(1): 97-101. DOI: 10.3863/j.issn.1000-2634.1994.01.015

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In recent years, MUSIC algorithm is frequently adopted in the estimation of time delay.It obtains and uses a set of vectors orthognal to signal time delay vectors by performing an eigendecomposition of covarince matrix of veceiving signal. Eigendecom position, however, requires a considerable amount of computations. Based on a permuted matrix rank revealing QR facterization,a new method is presented in this paper for the estimation of time delay. Computer simulation shows that the proposed method can perform almost as well as MUSIC algorithm in terms of signal resolition,and the cost of this method is much lower than eigende-composition.

Class of High Accuracy L-Stable Explicit One-Step Method for Solving Stiff Ordinary Differential Equations

Xiang kaili Zhang Jianguo

1994, 16(1): 102-109. DOI: 10.3863/j.issn.1000-2634.1994.01.016

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This paper presents a class of high accuracy L-stable one-step method for Solving stiff ordinary differential equations on the basis of [1] and [2],which improves and extends the method introduced in [1] and [2]. In comparison with same order implicit methods,it has advantages of simple structure, less calculation,good stability and high accuracy,and it is applicable for some types of stiff problems.

Effects Of Vacuum Saturation Method on Electrical Resistivity Measurement of Rock Samples

Zhang Kaihong Chen Fuxuan Chen Yijian

1994, 16(1): 110-114. DOI: 10.3863/j.issn.1000-2634.1994.01.017

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This paper present a method to replace in a process of vacuum saturation the residual air with injecting CO2 gas so as to reduce the error in the measurement of electrical resistivity.The results of a series of experiments show that this method has improved the conventional method of vacuum saturation and almost increased the accuracy of the measurement by 10%.In addition,a better experimental process is also suggested in this paper.

Statistical Analysis and Citation Research of China s Petroleum Scientific Papers

Peng Xuexue Liu Tingyuan

1994, 16(1): 115-123. DOI: 10.3863/j.issn.1000-2634.1994.01.018

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The statistical analysis and citation reserach of 1433 papers of 20 china a scientific periodicals in 1992 have given some important resuts in the field of petroleum science and technology in this paper: institues in order of the number of the papers published, Chinese and non-Chinese core periodicals, the writers in order of citation frequency, and obselescence rate of Chinese and non-Chinese papers.

Resesrches in Natural Gas Industry in the Upper Reaches of the Yangtze River and It s Develepmental Strategy

Wang Tingdeng Yin Daiyi Lan Guangzhi Min Qiao

1994, 16(1): 124-131. DOI: 10.3863/j.issn.1000-2634.1994.01.019

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This paper expounds this present situation and developing trend, and presents the preliminary envisagement of establishing East Sichuan and Central Sichuan chemical industry greup with Chongqing as its center,on the basis of the investigation of anturgl gas and chemical industry, It points out that the prouducts of Sichuan Natural gas and salt and chemi cal industries shoud develop towards seiation and fineness.

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