Table of Content

20 April 1996, Volume 18 Issue 2

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地质勘探

Stratigraphic Classification and Tracing of Xiangqi Group in Central Sichuan-South Sichuan Transitional Belt

Zhu Shi-jun Huang Ji-xiang

1996, 18(2):  1-7.  DOI: 10.3863/j.issn.1000-2634.1996.02.01

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According to the equitime character of seismic reflection and the characteristics of seismic atratigraphy, the authors have classified and traced the layres of Xiangqi Group in Central Sichuan-South Sichuan transitional belt, and provided the fundamental data for the further study of the layres.


Research of Automatic Classifying-Formation Method from Well Logging Curves on Electro-Facies Analysis

Xia Hong-quan Chen Fu-xuan Huang ji-xiang

1996, 18(2):  8-14.  DOI: 10.3863/j.issn.1000-2634.1996.02.02

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Classifying-formation from logging curves is a basic step in the course of automatic electro-facies analysis. This paper studies the method of automatic classifying-formation in a deep going way on the basis of thorough analysis of many normal methods, and uses max-minimum and variance technique to solve this problem. Taking S3formation of complex rocklitho profile in 08 well and other boreholes . The result shows that this method is not only easy, practical, but also fast in calculation and reasonable and accurate in classifying formation. Therefore it can be adopted for reference and applied in fine log facies analysis.


Study of Secondary Pore Formation on the Basis of Chemical Behavior of Minerals in Alkaline-Flooding Agents

Chen Zhong Luo Zhe-tan Shen Ming-dao Tang Hong-ming

1996, 18(2):  15-19.  DOI: 10.3863/j.issn.1000-2634.1996.02.03

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On the basis of systematical research on the chemical behavior of reservoir minerals in alkaline-flooding agents, the authors put forward a mew idea that alkaline diagenetic setting is favorable for the formation of secondary pores in sandstone reservoir. Furthermore, the authors suggest an “acid-alkaline chain reaction” model for a mono-system, and prove the existance of alkaline diagenetic settings through rock mineral composition analysis and the reference of literatures. Obviously, the idea has positive effect on oil /gas exploration.


Study of Microscopic Oil Displacement Efficiency of Shengyang Oil field Reservoir

He Qiu-xuan Gao Yong-li Ren Xiao-juan Du Hui

1996, 18(2):  20-24.  DOI: 10.3863/j.issn.1000-2634.1996.02.04

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According to the actual condition of Shengyang Oil field reservpor. 7 formation micro-models were made with the core casting slides of Well Jing 11 and Wells Jing 63-27 in Shengyang Oil field. This paper introduces the direct observation and research of the influence of the crude oil viscosity of S43reservoir in Shengyang Oil field and porous construction on displacement mechanism and efficiency, and the distribution charecteristics of remaining oil, by using micro-visual physical simulating technique, and with the help of microphone, camera and video recorder, and picture analysis technique, dtc.


油气藏工程

Study of Weightlessness and Air Cutting of Cement Slurry in Hihgly Derivated and Horizontal Well

Guo Xiao-yang Liu Chong-jian Xie ying-quan Xu Shu-qian Wang Jun Su Hong-sheng

1996, 18(2):  25-34.  DOI: 10.3863/j.issn.1000-2634.1996.02.05

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Rules of weightlessness and air cutting in highly derivated and horizontal wells are not the same as in vertical wells, which lies in the effects of cement slurry filtration rate, hole derivation angle, well calibre and well structure, etc. Weightlessness and air cutting of zero-filtrateless cement slurry result from suspended agglomeration, but those of non-zero-filtrateless cement slurry are caused by free water groove formed on the upper wellface as well as suspended agglomeration. The study also shows that the filtration rate of cement slurry measured with API normal method is not reasonable and it must be measured with the measuring tube inclined 45℃.


Study on Rock- breakingMechanism of Nozzle Jet of Rock Bit

Xiong Ji-you　Liao Rong-qing　Chen De-jie　Sun Wen-tao

1996, 18(2):  35-41.  DOI: 10.3863/j.issn.1000-2634.1996.02.06

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Basing on rock scouring of nozzle jet, this paper analyzes the rock- breaking way of rock bit, the mechanism of main and auxiliary hydraulic rock breaking and the basic action and effective factors relating rock breaking. The result shows, under the conditions of current pump unit, rock bit nozzle jet has a direct rock- breaking action on mudstone,shale and coarse grain sandstone, and an auxiliary one on limestone and fine grain sandstone. The impulsive pressure of nozzle jet, the jet pulse property, the rock porosity and the developing condition of fracture are three effective factors of main and auxiliaty hydraulic rock breaking.


Study of The Method to Evaluate Anti-Sag Property of Mud filtrate through Logs

Liu xiang-jun Luo Ping-ya

1996, 18(2):  42-47.  DOI: 10.3863/j.issn.1000-2634.1996.02.07

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Activity equilibrium theory was presented long ago and applied to evaluate and design of anti-sag property of mud filtrate. However, since it is impossible to take water sample from shale formation, so far we haven' t found a way to determine the ionic activity of water solution in shale formation through laboratory experiment. Therefore, its application in shale formation had always been restricted. In this paper, a theoretical research is made on the application of geophysical logging in this domain. The results show that it is possible to determine the ratio of mud filtrate to the ionic activity of formation water solution and the iomic activity by making fukk use of the present log data combining with the dual water model of shaly sand formation. Accordingly, anti-sag property of mud filtrate can be adjusted, or the bydration of mudrock can bi conteoled.

Model of Horizontal Well in Fractured Reservoir

Zhang Lie-hui Li Yun Du Zhi-min

1996, 18(2):  48-55.  DOI: 10.3863/j.issn.1000-2634.1996.02.08

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Based on L K Thomas et al' s basic idea of dual porosity, single permeability model, the paper has put forward a new, overall, full-implicit three-dimension and three-phase model of horizontal-well in fractured reservoir, comprehensively considering the relation between oil and water, or oil and gas, capillary imbition, gravity drainage。


Study on productivity prediction of the horizontal wells with completion methods of perforation series

Xiong You-ming Pan Ying-de

1996, 18(2):  58-62.  DOI: 10.3863/j.issn.1000-2634.1996.02.09

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This paper makes a research on the mathematical model of productivity prediction in view of the four completion methods or horizontal wells of perforation series, such as casing perforated completion, inside casing wire wrapped screen, inside casing gravel pack, inside casing prepacked gravel liner and in consideration of the effect of formation damage, well completion methods and well completion parameters on the productivity of horizontal wells. Example calculation shows these mathematical models and their calculation methods are feasible and can be used in the optimum selection of well completion methods and the optimum design of well completion engineering.


Prediction of Reservoir Performance with Optimized compound GM(n,h)Model

Zhou Xiao-ping Huang Bing-guang Zhu Yong-xian

1996, 18(2):  63-67.  DOI: 10.3863/j.issn.1000-2634.1996.02.10

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Since 1982, grey system theory has been widely applied in many realms, but its application to predicting reservoir performance is much limited, and its effect is not very ideal. This paper expounds the basic concept with grey system theory, and successfully predicts various development indexes in the light of actual production data of reservoir. The result is quite accurate and reliable.


On the Pre-Proceeding Method of the Pressure Measuring Data in Well Testing

Hu Ze

1996, 18(2):  68-74.  DOI: 10.3863/j.issn.1000-2634.1996.02.11

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A pre-proceeding method of the pressure measuring data in well testing is presented in this paper. Using the pre-proceeding method of signal arrangement, adaptive Kalman filtering and B spline function fitting, we can obtain the pressure and pressure derivative at random point in testing time. Two examples illustrate the characteristics of the method.


Prediction System of Sidewall Stability Based on Fuzzy Reasoning

Cao Xie-dong Pu Xiao-lin Zhao Gang

1996, 18(2):  75-77.  DOI: 10.3863/j.issn.1000-2634.1996.02.12

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this paper introduces a fuzzy reasoning system used in the prediction of sidewall stability. The system consists of dynamic data base, knowledge base, fuzzy reasoning and man-computer interaction and it has been proved to be valid by the practice in some directional inclined wells in Chang Qing Oil-field


石油机械工程及其它

Study on Staging Testing of Soft Formation Roller Bit

Huang Chun-sheng Lian Zhang-hua

1996, 18(2):  78-81.  DOI: 10.3863/j.issn.1000-2634.1996.02.13

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This paper introduces a number of indoor physical simulating experiments with 215.9XHP 25-1 and 215.9 HPZ soft formation roller bits used in drilling Zizhong-sand and Jiayi-Limestone. The relationship of the torque and the penetration rates of the two types of bits varying with the bit weight and their average drive ratio are obtained through data collection and data processing system. and some important experimental data are provided for the improvement and design of the two types of soft formation roller bits.


Study of PDC Bit Geometry

Li Shu-sheng Ma De-kun Hou Ji-kang

1996, 18(2):  82-86.  DOI: 10.3863/j.issn.1000-2634.1996.02.14

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This paper systematically studies the relationship of the geometric structural parameters of PDC bits, and derives the essential equations of PDC bits geometry without making any hypothesis and simplification. The essential equations can be directly applied to the studies of PDC bits kinematics and cutting mechanics, and the bit design, eliminating counting errors caused by geometric simplifications.


Analysis of Factors Affecting Jet Pump s Performance

Zhao Shu-lan Meng Kun-liu Zhang Zheng-quan Yu Ping-ren

1996, 18(2):  87-94.  DOI: 10.3863/j.issn.1000-2634.1996.02.15

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A jet Pump s performances are characterized by its efficiency, cavitation and submerence from different aspects. This paper gives a detailed analysis of the factors affecting the jet pump performances and the law of their change from the three aspects respectively, so as to present a reference for the application of jet pumps in oil fields.


Set-up of Itemized Reliability Indices for Combined-Arched Pipe Bridge

Song Wen-li Yao An-lin

1996, 18(2):  95-104.  DOI: 10.3863/j.issn.1000-2634.1996.02.16

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This paper discusses the problems on the loading response combination of combined-arched pipe bridge and the statistical analysis of the component resistance of the structure, sets up the failure criteria for the components of the structure, and derives the formulas to be used for calculating the itemized reliability indices of the pipe bridge by using the centre-point method of the first-order second-moment theory. They formulas can be used as the basis of reliability analysis and the design of combined-arched pipe bridge.


油气化学工程与化工

Application and Development of Flame Retardant

Deng Lan Zhu Lin Zhou Wen-yong

1996, 18(2):  105-110.  DOI: 10.3863/j.issn.1000-2634.1996.02.17

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This paper briefly introduces the types and mechanism of flame retardant, and its application and development at home and abroad.


Sulfonation of Alkali Lignin and Its Application in Slurry

Yin Zhong Yang Lin

1996, 18(2):  111-116.  DOI: 10.3863/j.issn.1000-2634.1996.02.18

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Lignosulfonate can be synthesized with the scrap produced in alkali papermaking process and it can further be mixed wity 4 % FeSO4•2H2O into a slurry deluent. The determination of the slurryoperties shows that it has the characteristics of good temperatureresistance and dilution effect, and certain water-loss capacity as well. At the same time it eliminates the pollution of chromium to environment.


Study of Technogical Scheme of Recovering Light Hydrocarbons from Small Flow and Low Pressure Gases

Jiang Hong Zhu Chong

1996, 18(2):  117-122.  DOI: 10.3863/j.issn.1000-2634.1996.02.19

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On the basis of an example of the technological scheme design of recovering light hydrocarbons, a study is made on the scheme of recovering light hydrocarbons from small flow and low pressure gases. A rational scheme of recovering light hydrocarbons is achieved through technological calculation, parameter analysis and scheme comparison.


计算机应用、管理科学

Preliminary Research of Comprehensive Evaluation of Large-Scale Engineering Systems

Yu Xiao-zhong Zhang Ji-jun Xi You-min

1996, 18(2):  123-127.  DOI: 10.3863/j.issn.1000-2634.1996.02.20

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Basing on the analysis of the characteristics of the large-scale engineering systems d their total operational models, this paper puts forward the concept of the evaluation of rge-scale engineering systems, and establishes a corresponding evaluation model. In addition, this paper makes a preliminary research about the evaluation of the structure, environment, input and output, feedback, characteristics and operating state of the largeale engineering systems.


Calling of Programs Written on Fortran from Environment in C

Jiang Rui-jing

1996, 18(2):  128-132.  DOI: 10.3863/j.issn.1000-2634.1996.02.21

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In view of the fact that programs written in C are widely used at present and programs written in Fortran were often used in engineering computations, this paper holds that the function modules written in Fortran can be called from programs written in C , which is very useful in solving some actual problems. The purpose of this paper is to provide the points for attention in the calling processes mentioned above.


Emphasize Basic Reseach to Stabilize Research Ranks

Jiang Hong Tang Lang-qing

1996, 18(2):  133-136.  DOI: 10.3863/j.issn.1000-2634.1996.02.22

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Basic research brings about high technology and is an important way to improve teaching and cultivate senior specialists. It is also an important measure to enhance the competition at high levels. In order to win the future competition , universities and colleges must emphasize the basic research to stabilize the research ranks and have their own strength, superiority and characteristics so as to be able to exist and develop.