Table of Content

20 February 1996, Volume 18 Issue 1

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石油地质勘探

Reservoir Pattern Recognition

Yi Zhongfu Zhuang Youzhi Tang Jianhua Xia huiping

1996, 18(1):  10-20.  DOI: 10.3863/j.issn.1000-2634.1996.01.001

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Pattern recognition is effective to determine oil and gas range with the seismic and log data. This paper introduces the way and the principles of operating this reservoir pattern recognition system developed by the authors. This system can obtain 4 seismic feature parameters, transform 4 seismic features and design 3 classifiers.



Application of Comprehensive Analysis Method of Sedimentary Environment and Multiple Statistics to the Explanation of Sedimentary Facies

Mou Zhonghai Jiang Yuqiang

1996, 18(1):  21-26.  DOI: 10.3863/j.issn.1000-2634.1996.01.002

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This paper collects 12 types of seismic paremeters from seismogram, analyzes the sedimentary environment of the low stratum of the S 3 upper member in the TZ area of LH oilfield, and determines the type of sedimentary facies which possibly exists. This paper also divides the seismic measuring lines by the sendimentary facies number with the cluster analysis of the ordered sample method; therefore, the descriminant functions of sedimen-
tary facies in this area are set up. With these discriminant functions, the parameters of seismic measuring lines in this area are discriminated and classified by the method of successive discriminant analysis, and at last the throughgoing of sedimentary facies in this section of bed of interest is made clear. This method, which is proved by analysis and calculation, is very efficient for dividing the sedimentary facies in the areas or basins where
there is a seismogram.



The Comparative Study between Whole Rock Analysis and Kerogen Analysis

Li Xianqing Zhong Ningning Xiong Bo Wang Tieguan

1996, 18(1):  27-34.  DOI: 10.3863/j.issn.1000-2634.1996.01.003

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Whole rock analysis and kerogen analysis are two analytical methods of studying hydrocarbon source rock in organic petrology. Basing on the brief introduction of the two methods, the authors systematicallly compare their applications in oil and gas assessment.We think that whole rock analysis provides more information than kerogen analysis in the study of the characteristics, origin and classification of macerals, the abundance, type,
and maturity of organic matter, and the features of oil generation and migration. besides,whole rock analysis is faster, more economical and more perceivable than kerogen analysis, and so the former has obvious advantages. Though it has not completely replaced kerogen analysis so far, it is sure to be one of the methods necessary for the study of oarganic petrology in the future.



The Influence of Intercalation on the Effect of Thick Reservoir Exploitation

Jiang Jianwei Li Qingming

1996, 18(1):  35-38.  DOI: 10.3863/j.issn.1000-2634.1996.01.004

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This paper studies the influence of intercalation on the effect of thick reservoir exploitation. An intercalation is a non-permeable or low permeable layer with its lithology dense; the porosity less than 12 % ; the permeability less than 0.020μm2, and it divides thick reservoirs into a number of independent flow units. This paper, in view of the thick reservoir charecteristics of Shuanghe Oil Field, studies the way of improving flooding conditions and raising the effect of thick reservoir exploitation by means of intercalation.



油气田开发

Countermeasure of Preventing Formation from Damage During Replacement Process in Air Drilling

Zhang Yiping Mong Yinfeng Luo Pingya Zhang Yongxing

1996, 18(1):  39-45.  DOI: 10.3863/j.issn.1000-2634.1996.01.005

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The use of air as a circulating medium for drilling is the best way for the development of low pressure and low permeable formation. As air drilling will reduce the pressure of annulus liquid column to the smallest degree, it can acquire a greater penetration rate without any damage to the pay zones. However, because of the limitation of the drilling logging, and cementing technologies as well as the formation conditions, the well drilled
by air has to be replaced by work fluid (drilling fluids). During the replacenent process,the liquid and solids in the work may invade the formation, and cause the formation damage. Furthermore, once the low pressure and low permeable formation is damaged, it is difficult to restore the primary formation permeability. on the basis of the experiments,and by using the shielding temporary plugging technique, the technical measures of pre-
venting formation from damage during the replacement process in air drilling are put forward in this paper. the experimental results show that the temporary plugging effect is relative to the annulus fluid column pressure and plugging agent concentration in work fluid. The annulus pressure controlling method in the process of replacement discussed in thes paper is able to plug the formation in a short period, and to prevent the fluid and solids from invading the formation. The temporary plugged particles can be easily removed since they do not enter the formation deeply, and the primary formation permeability can be restored.


comparison of Existing Method for Evaluating Compressibility of Mud Cake

Cui Maorong Luo Xinshu Guo Baomin Hou Qinli

1996, 18(1):  46-54.  DOI: 10.3863/j.issn.1000-2634.1996.01.006

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Through the experimental study of existing evaluation method of mud cake compressibility, this paper compares the compressibility under normal temperature static / dynamic state, with three evaluation methods-"cake percotation rate","penetrometer", and "two stage water loss". The result shows that it is convenient to evaluate mud cake compressibility by means of "two stage water loss" method , especially under no mud-pouring, and the data is reliable. The compressibility of mud cake is resulted from both elastic and plastic deformations.



Study of a Novel Theoretical Plate for Well-Testing with Changing Wellbore Storage and Its Application

Hu Yong Zhao Birong Li Yun

1996, 18(1):  55-61.  DOI: 10.3863/j.issn.1000-2634.1996.01.007

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In view of the present situation that the current analysis of well-testing with changing wellbore storage (CWS) is still at the theoretical research stage, and that it cannot suit the needs of oil and gas oilfield production, this paper establishes a novel model for welltesting with changing wellbore storage, and develops a theoretical plate for typical curves,such as hump-type curve, step-type curve and pseudo-standard-type curve, which are suitable for various changing well storage on the basis of a new method of calculating pressure derivate. This paper, by using a new CWS early-time approximate ,solves the parameter problem in the applicatiin of this novel plate, and in the end, make an analysis of an actual gas well.



Well Test Analysis Model of Dual Media Combined Reservoir in Consideration of Variable Wellbore Storage

Huo Shengning Feng Yiyon

1996, 18(1):  62-68.  DOI: 10.3863/j.issn.1000-2634.1996.01.008

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Using the general principle of Fair s model, this paper first presents a mathematical mode of complex well test analysis in view of the effects of skin, wellbore storage and phase redistribution in a dual media composite reservoir. Laplace-space solutions for this model are obtained by Laplace transformation, and then the type curves for the modern well test analysis are also obtained by numerically inverting methods. This paper analyzes the effects of every relative parameters on the type curves and the dynamic chracteristics of its pressure. This method eleminates the multisolution problems associated with type curve analysis and possible misinterpretations of pressure data which might result from not recognizing the phase redistribution in pressure build-up test and the composite reservoir behavior.



The Effect of the System of Alkaline and Polymer the Dynamic IFT between Oil and Water

Wang Pingquan

1996, 18(1):  69-77.  DOI: 10.3863/j.issn.1000-2634.1996.01.009

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In view of Xinglongtai oil field, Liaohe, this paper studies the dynamic IFT between crude oil and alkaline liquids, such as NaOH and Na₂CO₃and particularly examines the effect of alkalipolymer system on the dynamic IFT between oil and water. The results show that the change of IFT between crude oil and alkaline wate with time is a dynamic one;The adding of polymer decreases the dynamic IFT between crude oil and alkaline water.THe higher the alkaline concentration is, the more stable the dynamic IFT (Eq) between
crude oil and alkaline water; The effect of biopolymer on the alkaline water flooding is especially sensitive, which is favourable to the decrease of the dynamic IFT.




Preliminary Analysis of Mathematical Models for Cracks Closed and Pressed after Pump Stopping and Pressure Relief in Hydraulic Fracturing

Qu Zhan Ren Shuquan

1996, 18(1):  78-86.  DOI: 10.3863/j.issn.1000-2634.1996.01.010

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After the hydraulic fracturing work ends and the pumping stops, the cracks fractured will show a tendency to close. Though fracturing sands try to stand in its way, there still exist closing and pressing to a certain degree. Thus the effect of hydraulic fracturing is not so optimistic as was calculated in the past. So, this paper tries to inquire into the problem that cracks are pressed and closed after the fracturing work ends and the puming stops. In light of the analysis of the sand deposit state in the fractured cracks, the pressing and closing of fractured cracks will be divided into two developing courses in which fracturing fluid continues to lose and sand heap is pressed. Therefore, a mathematical model is established for the problem that cracks are pressed and closed after the fracturing work ends and the pumping is stopped.



石油机械工程

System Simulation Technique of Oil Drilling Reciprocating Pump

Liang Hong Meng Yingfeng

1996, 18(1):  93-98.  DOI: 10.3863/j.issn.1000-2634.1996.01.011

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In this paper, the system simulation techniques are applied to the drilling hydraulic circulating and penetrating system with reciprocation pumps as the kernel. Taking the system as an example, we discuss the modeling method of complex engineering system and developing method of the simulator based on mixed models. The simulating exprimental results of the simulator coincide with the actual experimental results of objective system under the same conditions, thus proving the method and the results to be right.



石油化学工程

Research of Crowbar Sewage Purifying Equipment Treating Drilling Waste Water

Yu Xoali

1996, 18(1):  99-104.  DOI: 10.3863/j.issn.1000-2634.1996.01.012

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The analyses of the measurements before and after the treatment of the drilling waste water by the crowbar sewage purifying equipment show when suitable packings are selected, the treating result is very remarkable and the suspended matter and oil in water are greatly reduced. The treated water will achieve the water quality standard of re-cycle water.


Study on the Removal of Acid from Straight-Run Diesel by Complex Solution Extraction Method

Tang Xiaodong Xu Rong

1996, 18(1):  105-110.  DOI: 10.3863/j.issn.1000-2634.1996.01.013

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On the basis of [5], this paper further develops the technology that naphthenic acid is removed and recovered from straight - run diesel by the complex solution extraction method. The test shows that this process is rather efficient with more than 97 % of naphthenic acid removed. The quality of the treated diesel fuel is high enough to meet specification of GB252-77 . The composite solvent can be used repeatedly after it is recovered by
distillation, and in the meanwhile the by-products of naphthenic acid is obtained. This process eliminates the“three wastes”and is favourable to environmental protection. This process also overcomes the deficiencies of sodafining-electric treatment and surfuric acid neutralization methods.


油气化学工程

Affection of CPAM Molecular Parameters on Shale Control Inhibiting Property

Ma Xiping Tabg Haijun Chen Yuandong

1996, 18(1):  111-115.  DOI: 10.3863/j.issn.1000-2634.1996.01.014

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Cationic polyacrylamide (CPAM) with various molecular parameters is produced by the cationic activation of a number of synthesized polyacrylamides with different molecular weight. The affection of molecular parameters on shale has been studied by evaluation test.



管理科学，基础科学

Development and Application of Simulating technique in Electric Power System

Chen Weite

1996, 18(1):  116-121.  DOI: 10.3863/j.issn.1000-2634.1996.01.015

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This paper briefly introduces the present state of simulative technique of electric power system, and describes the application of analog computer, digital computer and hybrid computer to electric power system. It also describes the function of simulative training devices of electric power system.



Impingement of Market Economy and Option of Petroleum Colleges and Universities

Zhang Bin Wu Jingyan Zhang Mingquan

1996, 18(1):  122-128.  DOI: 10.3863/j.issn.1000-2634.1996.01.016

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The impingement of market economy on petroleum colleges and universities is twofold. A perfect system of market economy will open up a broad road for the development of peteleum colleges and universities; But at present, the negative action of the unperfect system of market economy on the petroleum colleges and universities must not be ignored, and we must keep a clear head to it.



The System Model of Production and Management Planning and Decision Making of Petroleum Mechanical Enterpriss

Xiong Zhijian Li Guangyao

1996, 18(1):  129-133.  DOI: 10.3863/j.issn.1000-2634.1996.01.017

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This paper researches the planning and decision making problem of petroleum mechanical multiproduct enterprises, and establishes the corresponding system model by using systematic dynamic principle. The behaviours and design of the system are discussed in this paper, and the result is applied to practice.



Matrix Eigenvalue Inverse Problem

He Chengcai

1996, 18(1):  134-140.  DOI: 10.3863/j.issn.1000-2634.1996.01.018

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In this paper, we give a solution of the eigenvalue inverse problem of three pairs of angular symmetric matrixes the main diagonal element of which is zero, by using the spectral connections of symmetric and skew-symmetric matrixes.