Table of Content

20 April 1983, Volume 5 Issue 2

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论文

LACUSTRINE GRAVITY FLOW SEDIMENTS OF THE UPPER TRIASSIC IN SHAN—GAN—NING BASIN AND ITS PETROLIFEOUS PROBABILITY

Wen Ying-chu

1983, 5(2):  1-21.  DOI: 10.3863/j.issn.1000-2634.1983.02.01

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In order to point out a favorable area for exploring petroleum of the Upper Triassic (the yenchang Series) in the Shan-Gan-Ning Basin, we have studied the depositional environment of the compact reservoir sandstones in the midst of the yenchang Series, their characteristics of diagenesis and the factors that have affected petroleum accumulation. Having surveyed 7 sections and the cores of over 20 wells, observed many thin—sections of rocks with polariscope and pluoroscope and analysed various relevant documents, we have come to the conclusion that the middle period of deposition of the Yenchang Serics was the time when most Basin widely advanced the lake in the Upper Triassic of the Shaw-Gaa-Niag.Then the deep lake basin developed about 40000 KMZ in the SouthVTest of the basin. In it were deposited turbidite fan sandstone and deep lake mudstone. The western margin of the basin was close to the source regions and very steep, so that pebbly subaquatic alluvial fans were forrited that were deposited from agravity flow. There was a gentle slope in the East of the basin, and the sediments majorly belong to sandy delta.The main reservoir sandstone of the middle section of the Yeachang Series are the turbidite fan sandstones. They are poorly porous and sorted, Under compaction the pores were reduced quite fast and the remained pores are mainly irreducible which are less than 10 microns. This turbidite fan sandstone, close to the source rocks，was favored in receiving the primarily migrating petroleum and forming reservoirs, whose porosity and permeability are very low.At the end of the paper it is suggested that the west area of the San-Gan-Ning Basin be the favorable place for present petroleum exploration of the Yenchang Series because in this area the coarse detrital sediments are developed, they are close to the Bourse rocks and there were some tectonisms that had—great influence on petroleum accumulation.

ABOUT THE PERMIAN—TRIASSIC CONTACT RELATION IN TIANFU AREA,CHONGQING

Yuan Zhao-li

1983, 5(2):  22-29.  DOI: 10.3863/j.issn.1000-2634.1983.02.02

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It was considered that the Permian—Triassic contact in Tianfu area, Chong qing, was conformable, with the paleontology being mixed. But we have found that in this area the contact is usually pseudo conformable and in some places it is slightly unconformable. Both the lithological characters and species of the paleontology above and below the contact are very distinct. Therefore, the Permian—Triassic interface must be the latest corrosive surface of Changxing formation.


THE OPTIMAL CONTROL THEORY AND ITS APPLICATION TO EVALUATION OF THE PARAMETER DISTRIBUTION IN A RESERVOIR

Li Yun

1983, 5(2):  30-48.  DOI: 10.3863/j.issn.1000-2634.1983.02.03

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Based on H. W. Chen and G. Chavent’s research for matching the history of production in a field by use of optimal control theory and through the research for the space of the adjoint function，we have extended the theory of adjustment for the case of a single—phase system to a Double—phase one. In order to eliminate the shortcomings of the original method, such as multiple solution，liability to overflow，vibrate and converge only to some local minimum in iteration procedure, our work has been concentrated on proper identity and steep convergence of the algorithm. With the improved method, we have made adjustment of parameters and the history matching of fictitious reservoir models and real fields, and got some satisfactory results.

TAE REASONABLE CASING DESIGN BY AND THE DOUBLE—STRESS METHOD COMPUTER PROGRAMS

Luo Chang-fu Liu Chong-jian

1983, 5(2):  49-63.  DOI: 10.3863/j.issn.1000-2634.1983.02.04

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After analysing and comparing some casing designs by double—stress methods, we have pointed out their characteristics and problems. we have also given the .accurate relationship between the actual downhole stress and double—stress and the reasonable casing design. In order to simplify casing design，a set of computer programs made with T1—59 computer is presented，arid these programs are available for oil fields.

A DESIGN OF A SELF—CENTERING SHALE SHAKER WITH A DOUBLE—DECK

Yang Guo-jun Ai Zhi-jiu Zhang Ming-hong Yang Chang-quan

1983, 5(2):  64-70.  DOI: 10.3863/j.issn.1000-2634.1983.02.05

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In this paper we introduce a design of a self-centering- double-deck shale shaker. Its main technical parameters and the locus of every point of the shale shaker's frame are given. Besides, we have discussed such problems，as structural features of the shaker and vibrator selection. It has been pointed out that the elliptic locus of the major axis that is parallel to the shaker screen plan is better than the circular one. In this way we have developed a more satisfactory design of the shat shaker for solid removal. In addition，in this paper it is concerned how to install and adjust the shaker.

LJZ—1 TYPE APPARATUS FOR LIQUID FLOW RATE AND WELL DIAMETER MEASUREMENT

Zhao Yi-jing Zheng shi-jin

1983, 5(2):  71-77.  DOI: 10.3863/j.issn.1000-2634.1983.02.06

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This paper presents an apparatus for measuring the liquid flow rate and the diameter of the wellbore. It can make remote measurements and withstand temperature as high as 1800 C. In this paper are described the working principles, specific characteristics and the results got with it. Besides, we introduce a method of determining the oil and water content with it and the way for us to solve such technical problems, as high temperature resistant property and restricted size. we have developed such a new technology that the thansistor circuits consisting of common discrete components can withstand temperatures as high as 200℃. and be used to make various nigh temperature circuits.


ABSOLUTE CONAERGENCE OF WALSH SERIES IN SPACE L^q

Xia Zi-fan Zhang Chun-gen

1983, 5(2):  78-86.  DOI: 10.3863/j.issn.1000-2634.1983.02.0107

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Our main results are following:Theorem 1 .Let 2n≤(m2n+1，Where n is non一negative integer f(x)∈L^q(0.1)，f(x+1)=f(x)，then the follwing is tenable.