Journal of Southwest Petroleum University(Science & Technology Edition)

STUDY OF FORMATION, EROSION AND DEPOSITION OF LESHAN-LONGNUSI PALEO UPLIFT

Hong Qing-yu

1993, 15(4): 1-10. DOI: 10.3863/j.issn.1000-2634.1993.04.001

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Such subjects as tectonics, sedimentology and geochemistry have been applied to study the formation, erosion and deposition of Leshan-Longnusi Paleo-uplift comprehensively and quantitatively. The author discussed the area, rate and slope of the uplift as well as subsidence rate, deposit thickness according to the versatile calculation results. Especially, the balance calculation result of the uplift erosion and its deposition rate is exact up to 93% and is trustworthy. The research reveals the formation, evolution and edposition of up-life。

ESTABLISHMENT OF POROSITY INTERPRETATION MODEL AND CHART BY CORE DATA IN T2 RESERVOIR OF DACHIGAN

Yu Min

1993, 15(4): 11-15. DOI: 10.3863/j.issn.1000-2634.1993.04.002

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Based on the porosity data by core analysis, this paper presents two new equations and two new interpretation charts to calculate porosity in carbonate reservoir. The results tally with the core data very well. The satisfied results have been achieved with the equations and charts in practical use.

ESTIMATION OF AMPLITUDES AND PHASES OF MAXIMUM ENTROPY SPECTRUM

Zhang Bai-lin Yang Men-yan

1993, 15(4): 16-24. DOI: 10.3863/j.issn.1000-2634.1993.04.003

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The estimation of maximum entropy spectrum is one of the modern estimation methods of high resolution spectrum. It has incomparable advantage over the conventional spectrum estimation, especially in processing short data. However, the use of the maximum entropy spectrum is much limited for the amplitude distortion in the estin ation.This paper emphatically introduces the accurate least squares method which is used to compute the optimum frequencies of the maximum entropy spectral signal and to get the true amplitudes and phases of the original signals by the regression method of trigonometric function.In this case，the method used to determine the Position of the oPtimum frequencies is a simple and accurate method，which is much better than those used before.

EVALUATION OF RESERVOIR FORMATIONS OF GROUP Ⅶ IN SHUANGHE OIL FIELD BY GREY RELATION ANALYSIS

Ran Qi-quan Zhou Nan-xiang

1993, 15(4): 25-31. DOI: 10.3863/j.issn.1000-2634.1993.04.004

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This paper considers the reservoir formations of group Ⅶ in Shuanghe oil field as a grey system. The best standard reservior formation is constructed according to the evaluation parameters of reservoir formation. The degree of relation between a reservoir formation and the best reservoir formation is calculated by the grey relation analysis. The reservoir formation is evaluated and classified according to the degree of relation. The results evaluated correspond to the actual condition very well.

IMPROVEMENT OF SAMPLING HYDROCARBON SERIES FROM CONDENSATE GAS RESERVOIR BY FLASH TEST

Wang Hai-qing

1993, 15(4): 32-37. DOI: 10.3863/j.issn.1000-2634.1993.04.005

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This article discusses the importance of hydrocarbon gas and liquid sampling method in the research of condensate gas reservoir, and introduces a new sampling method based on the analysis of the commonly used hydrocarbon gas and liquid sampling methods. The method has been proved to be practicable in the laboratory.

STUDY OF TURBULENCE DIFFUSION OF WELL CEMENTIING

Zheng Yon-gang

1993, 15(4): 38-42. DOI: 10.3863/j.issn.1000-2634.1993.04.006

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Using the hydromechanics basic equations of turbulence diffusion, this paper studies the models of the turbulence diffusions of the cement slurry and the mud in the spacer in oil well cementing, and derives the laws of the turbulence diffusion of the cement slurry and the mud in the spacer, as a result, presents the formulas of calculating the minimum volume of the spacer and the turbulent contacting time in well cementing, These formulas can be used for spacer design in well cementing in oil fields.

PREDICTION OF RESULTS OF SANDSTONE ACIDIZATION BY LUMPED PARAMETER MODEL

Zhao Li-qiang Gong Li

1993, 15(4): 43-50. DOI: 10.3863/j.issn.1000-2634.1993.04.007

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The method of using mixture of HF and HCL to treat sandstone formations of remove formation damage near the wellbore is a widely used stimulation treatment. However, how to predict the results of sandstone acidization and select optimal job parameters is still an open question. Using lumped parameter model to calculate the distribution of acid concentration along the formation, this paper presents a set of simple methods available for predicting sandstone acidization by using numerical solution to calculate the acidizing stimulation ratio.This paper also gives out the solution and calculations of some examples.

EFFECTIVE WELLBORE RADIUS MODEL WITH CONSTANT PRESSURE AT EXTERNAL BOUNDARY AND ITS TYPE-CURVES IN WELL TEST ANALYSIS

Jia Yong-lu

1993, 15(4): 51-57. DOI: 10.3863/j.issn.1000-2634.1993.04.008

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One of the main problems in well test analysis is that of constant pressure at external boundary. Having considered the wellbore storage and skin effects, this paper sets up a rigorous effective wellbore radius mathematical model, which is suitable for the homogeneous and isotopic porous medium and the circular reservoir with constant pressure at external boundary, and gives out a solution to this model in Laplace transform. Through numerical reversion, this paper calculates type-curves for this problem. The results obtained are accurate and reliable.

ANALYSIS OF CASING DAMAGE OF VISCOUS OIL WELL IN LIAOHE OILFIELD

Liao Run-kang Liu Kun-fang

1993, 15(4): 58-65. DOI: 10.3863/j.issn.1000-2634.1993.04.009

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Viscous oil recovery with steam injection is the most widely used and more profitable recovery technique at present. But the working life of casing under high temperature is a critical problem . This paper studies the cases of 194 damaged wells , analyzed the damage cause of viscous oil wells, carries on the simulation test on casing sample under well temperature , and at last presents suggestions of preventing casing from damage comprehensively。

A NEW METHOD OF ANALYZING HYPERBOLIC DECLINE OF PRODUCTION

Zhou Rong-hui Jiang Hong Liu Shu-zhi

1993, 15(4): 66-71. DOI: 10.3863/j.issn.1000-2634.1993.04.010

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The hyperbolic decine equation can be solved by many methods, which are established on their own mathematical bases. When these methods are used to analyze practical data, there may arise some problems. Having analyzed and compared some typical solutions to the hyperbolic decline equation, this paper presents a new statistical analytical sieve method. Its accuracy and reliability are verified through practical examples.

POST ANALYSIS OF OPTIMIZATION OF BOTTOM-HOLE ASSEMBLY IN NU MH—1 HORIZONTAL WELL

Liu Yan-qang Lu Ying-min

1993, 15(4): 72-78. DOI: 10.3863/j.issn.1000-2634.1993.04.011

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This paper uses moving coordinate iteration method to analyze the theory of forces and deformations of a large deflection drill string , and makes the optimization computation and poat analysis of bottom-hole assembly (BHA) in Nu MH-1 horizontal well in Degang oil Fi eld by introducing friction into balance computation. The computation results are in agreement with the field BHA, thus indicating all the drilling tools used are more reasonable.

ANALYSIS OF TECHNOLOGICAL CHARACTERI STICS OF WATER DRAINAGE AND GAS EXTRACTION BY SUCKER—ROD PUMP IN DEEP WELL AND STUDY OF RATIONAL DISPOSITION OF SYSTEM EQUIPMENT

Men Kun-liu Pan Ya-jia Bian Yu-wen Wen Gao-bi Lin Ning

1993, 15(4): 79-84. DOI: 10.3863/j.issn.1000-2634.1993.04.012

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This paper expounds the technological characteristics and the response to its system equipment under conditions of water drainage and gas extraction by a sucker—rod pump in deep wells , analyzes the basic requirements of system equipemment disposition, proposes two projects of system equipment to be disposed rationally, and makes technical assessment.

ANALYSIS AND CALCULATION OF ROCK BIT S DIAMETER ERROR

Lin Yun-long

1993, 15(4): 85-89. DOI: 10.3863/j.issn.1000-2634.1993.04.013

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Based on the theory of rock bit geometry and using computer technique, this paper has systematically analyzed and calculated the factors affecting the manufacture error of rock bit s diameter, the relationship between the tolerance of design parameters and the diameter error, and the distribution of rock bit s dianeter error. This paper has also introduced the compiled software briefly.

PRINCIPLE OF SOFTWARE FOR PRECISE DATA ACQUISITION SYSTEM AND ITS APPLICATION IN SINGLE CONE BIT TEST

Jiao Pei-lin

1993, 15(4): 90-94. DOI: 10.3863/j.issn.1000-2634.1993.04.014

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This paper introduces the software principle and the program compiling method for data acquisition with PDC(precisidata acquisition and control system), and its application in the single cone bit test. It includes : 1. the method for scanning channels as an oscilloscope before data acquisition starts; 2. the method for selecting the program controlling amplification and for determining the converting coefficient automatically by the software; 3. the method for acquiring the pulse—digital signals from multichannels at the same time;4.the method for timing data acquisition and change in frequency with the software;5.the method for dealing with data and drawing curves with powerful functions Of dealing，displaying and controlling pictures by the software AUTOCAD.
The tests have proved that these methodds are useful for reducing data acquisition errors，making tests reliable and dealing with data easily without expensive equipment.

SOLUTION TO BUCKLING PROBLEMS OF STRUT AND FRAME BY LAPLACE INTEGRAL TRANSFORM

Li You-xing

1993, 15(4): 95-99. DOI: 10.3863/j.issn.1000-2634.1993.04.015

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According to the approximate differential equation of strut, and by using Laplace integral transform, this paper obtained a new solution which is called bending moment method of Laplace integral transform, by which buckling problems of Frame can be solved. The concept of this method is clear. The method is convenient and applicable, and may be for reference in practical engineering.

A NEW CALCULATION METHOD OF DIMENSION GROUPING OF COMPENSATING GAUGE

Wang Tian-min

1993, 15(4): 100-105. DOI: 10.3863/j.issn.1000-2634.1993.04.016

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In the course of assembling with compensating gauge, It is not an easy job to determine the group number of compensating gauge and dimensions of each group. This paper recommendes a new graphical method to calculate the dimension of compensating elements in a more easy and intuitive way. It is of guidance meaning for both teathing work and machine manufacturing practice.

NEW METHOD OF SEWAGB TREATMENT IN OIL PRODUCTION

Li Guang-yu Yang Xu

1993, 15(4): 106-111. DOI: 10.3863/j.issn.1000-2634.1993.04.017

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This paper suggests a new method of treating sewage in oil production, discusses several factors influencing dissolved—gas flotation. Experiments show that dissolved—gas flotatin gs a better method for treating sewage than coagulation. This treatment can decrease the amount of oil, SS and increase MF significantly, Further treatment by filtration gives clear water with MF>20,SS<3.4 mg/l, oil<3.0 mg/l. So the treated water can be reinjected into the formation and it causes less permeability decrease than that treated by the present method.

STUDY OF MANAGEMENT SYSTEM FOR TRANSFORMING SCIENTIFIC AND TECHNOLOGICAL PAYOFFS INTO PRODUCTION

Li Xioa-qun Min Qiao Lan Guang-zhi

1993, 15(4): 112-116. DOI: 10.3863/j.issn.1000-2634.1993.04.018

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In order to transform scientific technological payoffs into production effectively ,the key lies in establishing a managenent system to assure the transformation, besides the full initiative of both universities and enterprises and the feasible supports of scientific—technological administrations. Based on the analysis of influential factors and related countermeasures, this paper discusses the management system.

STRENGTHENING DOCUMENT ESTABLISHMENT IN SOFT WARE DEVELOPMENT ACCORDING TO SOFTWARE ENGINEERING STANDARD DEMAND

Huang han-guang

1993, 15(4): 117-120. DOI: 10.3863/j.issn.1000-2634.1993.04.019

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In accordance with the fact that the document establishment is ignored in software development, that the software engineering standard is not understood, and that the establishment of the document information is not based on the software engineering srandard demand at present, this paper points out the importance and essentiality in document esablishment according to the software engineering standard demand.

DEVELOPMENT AND APPLICATION OF MID WATER WAY

Zhou Ming

1993, 15(4): 121-124. DOI: 10.3863/j.issn.1000-2634.1993.04.020

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Midwater way system means that a part of living wasewater is used by man as momliving water after it is treated many times. We hope that the midwater way can solve the serious problem of shortabe of freshwater resources in part.

TNTELLIGENCE PROCESS CONTROL SIMULATION SYSTEM

Pu Zheng-gang He Dao-qing

1993, 15(4): 125-128. DOI: 10.3863/j.issn.1000-2634.1993.04.021

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This paper briefly introduces the principle and the application of modern simulation technique and intelligence process control simulation system constructed by the modern simulation principle computer on-slices and IBM-PC, and then explains the design idea, basic structure and work method of this system thoroughly.

DISCUSSION OF SOLUTION OF HORIZONTAL WELL UNIFORM LINEAR SOURCE

Huang Sen-nan

1993, 15(4): 129-132. DOI: 10.3863/j.issn.1000-2634.1993.04.022

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In the study of horizontal well in homogeneous rectangular reservoir, this article verifies two identities, thus transforming the solution of horizontal well uniform linear source into the form easy to compute.

UNIQUENESS OF CAUCHY PROBLEM FOR A DOUBLYCHARACTERISTIC EQUATION

Xie Cheng-kang

1993, 15(4): 133-138. DOI: 10.3863/j.issn.1000-2634.1993.04.023

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This paper studies the uniqueness of Cauchy problem for the doubly characteristic equation If μ is an integer, m—μ initial data are necessary so theat we have the uniqueness; if μ is not an integer, one initial datum is enough.

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