Table of Content

20 February 1983, Volume 5 Issue 1

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论文

THE DIAGENETIC HISTORY AND POROSITY EVOLUTION OF JIAN TIAN BA SPONGY REEF OF UPPER PERMIAN IN LI CHUAN, HUBEI

Shen Zhaoguo

1983, 5(1):  1-13.  DOI: 10.3863/j.issn.1000-2634.1983.01.001

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In this paper the diagenesis and the diagenetic environments, as well as their controlling affect on the hydrocarbon reservoir space of Jian Tian Ba spongy reef have been studied, the modle of the porosity evolution in diagenetic history has been established. Taking Jian Tian Ba spongy reef as an example, we are trying to present some petrographic theoretical bases for evaluation of the reservoir conditions of Permian organic reefs in the East Sichuan-West Hubei area.

A COMPUTER SIMULATION OF WELL CONTROL

Shi Taihe

1983, 5(1):  14-22.  DOI: 10.3863/j.issn.1000-2634.1983.01.002

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It is necessary to circulate out the kick from a well promptly in order not to result in blowout in case it is traced. This paper introduces some factors involved in kick simulation with computers. Printed with the line printer is the information including both input data and simulated results such as casing control pressure, gas column hight, pressure at any interesting depths, gas top depth and pressure drop in annuli. All above data are tabulated and plotted against the pump volume.

EXPERIMENTAL RESEARCH INTO PREVENTING THE HYDROSTATIC HEAD LOSS OF GAS-GENERATING CEMENT SLURRY

Drilling Technology Teaching and Research Section

1983, 5(1):  23-32.  DOI: 10.3863/j.issn.1000-2634.1983.01.003

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We have analysed the mechanism of preventing hydrostatic head loss of gas-generating cement slurry, and made a series of experiments with general cement slurry and gas-generating one in simulated well hole to contrast their properties. The results of the experiments prove that the performance of gas-generating cement slurry is acceptable in cementing.

ANALYSIS AND TEST OF THE MECHANISM OF CEMENT DISPLACEMENT

Dai Zhixin

1983, 5(1):  33-41.  DOI: 10.3863/j.issn.1000-2634.1983.01.004

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In this paper, on the basis of rheological theory, we have discussed the effect of the slurry properties on the mud displacement efficiency in eccentric annulus. Moreover, several equations for calculating thecriticasl gel strength of various slurries have been derived. The results of our test conform to the theoretical analysis.

A FINITE INTEGRAL TRANSFORMATION AND ITS APPLICATION IN PENETRATING FLUID MECHANICS

Feng Wenguang

1983, 5(1):  42-55.  DOI: 10.3863/j.issn.1000-2634.1983.01.005

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The article presents a general method for constructing a finite integral transformation which is specifically determined by the equation, the boundary conditions and the variating scope of the independent variables. This translation is always effective in solving general second order partial differential equations with independent variables of finite variating scope, it still hold good in solving fourth order partial differential equations.

BENDING FATIGUE PROPAGATION LAWS OF SURFACE CRACKS IN SHEET AND SHAFT ELEMENTS

Wang Zhouqi

1983, 5(1):  56-70.  DOI: 10.3863/j.issn.1000-2634.1983.01.006

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In this paper, from basic theories of fracture mechanics, we have introduced the idea of equivalent energy release rate, constructed a model of fatigue propagation rate of surface cracks and derived a series of equations. After studying bending fatigue propagation laws of surface cracks in sheet and-shaft specimens, we have set up a characteristic method of predicting the fatigue life of elements with surface cracks by means of experimental results of general through-crack specimens of the same material.

RECURSIVE ALGORITHM OF LATTICE POINT PROBLEM AND COMPARISON BETWEEN IT AND ITERATON ALGORITHM

Zhou Zhongbo

1983, 5(1):  71-82.  DOI: 10.3863/j.issn.1000-2634.1983.01.007

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Recursion is a more powerful algorithm than iterative loop. On the one hand, for every iterative loop there is always an equivalent recursion. On the other hand, some problems, insoluble by means of iterative loop, are often solved by recursion. The Lattice Point Problem is typical one of these problems.By constructing an effective algorithm for the Lattice Point Problem, we have firstly discussed how to choose a proper algorithm depending on the inherent structural relations of a certain problem.