Journal of Southwest Petroleum University(Science & Technology Edition)

PRELIMINARY STUDY OF DEVELOPMENT CHARACTERISTIC OF ORGANIC REEFS IN EARLY-MIDDLE SILURIAN, NW SICHUAN

Zhang Ting-shan Gao Wei-dong Lan Guang-zhi Qiang Ping

1990, 12(4): 1-9. DOI: 10.3863/j.issn.1000-2634.1990.04.001

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Organic reefs in Early-Middle Silvrian, NW Sichuan, are small patch reefs on bioclastic banks in offshore continental shelf environment dominated by terrigenous sediments. The bioclastic banks are formed by storm action. The development of organic reefs is influenced by taphonomic feedback process. The input of massive terrigenous sediments and the excess of terrgenous nutrients are the major factors to control their development.

STUDY OF ORIENTATION OF ALGAL OOLITES

Dong Zhao-xiong

1990, 12(4): 10-17. DOI: 10.3863/j.issn.1000-2634.1990.04.002

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Most people usually pay more attention to the gravitative compaction when they study the compaction of carbonatesediments than to the compaction from side pressure. By studying algal oolites in algal oolitic grainstone of Middle-Upper Devonian, Gan Dong Zi, Tian Lin, Guang Xi, this article thinks that the changes in shape and direction of algal oolites are caused not by the gravitative compaction but by Yin Zhi (Yan Shan )movement after Middle Triassic The factors controlling the changes in shape and direction of algal oolites are tectonic compaction，early cementation，composition of grains，gravitative compaction，and dissolution-filling etc.，of which the tectonic compaction，early cementation and composition of grains are main factors.

GEOLOGIC AND GEOCHEMICAL CONDITIONS OF FORMATION OF ZHONGBA CONDENSATE GAS FIELDS IN NORTH-WEST SICHUAN

Zheng Yong-jian Lin Feng Wang Ting-dong Yan Wan-xun

1990, 12(4): 18-30. DOI: 10.3863/j.issn.1000-2634.1990.04.003

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By studying formation conditions of Zhongba gas fields in Xu-2. Lei-3 condensate gas reservoirs, this paper shows that in the matvre period, continental-source-origin Oil and gas, Sapropelic and humic type of oil and gas of dfferent sources, and mixed source type of oil and gas can also form condensate gas reservoirs under given conditions. The geological factors of their formation and accumulation are organic lithofacies zones in favour of forming the condensate oil and gas system, fitting temperature and pressure conditions and fime-space metch of trap，migration and resrvoir conditions for forming condensate gas reservoirs.

ON TRANSFORMATION OF INTERNAL AND EXTERNAL GEOCHEMICAl ENERGY

Hong Qing-yu Den Tao

1990, 12(4): 31-39. DOI: 10.3863/j.issn.1000-2634.1990.04.004

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Rocks have laws of q-value increase in the earth s surface, in which magmatic and metamorphic rocks absorb universal energy such as the solar energy etc, to change into sedimentary rocks. In the depth of the earth s crust, sedimentary rocks release the energy and change into magmatlc or metamorphic rocks. The energy like this has been transformed through internally formed lower crystal lattice energy s minerals and externally formed higher crystal lattice energy s minerals which are energy’s carriers, and transformed by leading control elements like silicon and aluminium，as well as oxygen，sodium，potassium，magnestum and iron etc. . The external energy replenlshes the internal energy and acts through the internal energy，thus causing the great motion of remaking landforms.

UNIFIED MODEL FOR CALCULATING CASING S PRESSURE AND STAND PIPE S PRESSURE IN KILL WELL

Liu Hui-xing

1990, 12(4): 40-48. DOI: 10.3863/j.issn.1000-2634.1990.04.005

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Drillers, waiting-and-weighting and circulating-and-weighting techniques are commonly used kill well methods in oil fields. On the basis of principles of fluid mechanics and conditions of kill well, the rules of casing s pressure and stand pipe s pressure are analyzed, and the unified model has been set up, which is of the advantages of compatability, accuracy and programing. The unified model is not only conveniently used in oil fields, but lays the theoretical foundations for kill well simulators as well.

ANALYSIS OF PROBLEMS IN ACTUAL APPLICATION OF THE THEORY OF ELECTRICITY IMITATING PLANE-RADIAL FLOW

Feng Yao-ping Pan Ying-de Tang Yu-la Tang Jun

1990, 12(4): 49-59. DOI: 10.3863/j.issn.1000-2634.1990.04.006

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By using the similar principle of water-electricity imitation, this paper has mainly explored the problems existing in the actual application of electricity imitating plane-radial flow, and analyzed the features of the flow mediums of both water and electricity. By exploring theoretically and experlmentally, the causes of the present problems have been revealed. The rule of properly choosing parameters (rw, p, f) has been advanced in electricity imitating plane-radial flow, giving assurance that the theory is more practicable in actual application .

ON CALCULATION IN DESIGNING DOUBLE-AXIS INERTIA ELLIPTIC VIBRATING-SCREEN

Zhang Ming-hong Chen Ying-hua Tang Zhi et.al

1990, 12(4): 60-66. DOI: 10.3863/j.issn.1000-2634.1990.04.007

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Based on the concept of force-centre of double-axis inertia vibratingscreen put forward for the first time, this paper has analyzed and discussed some problems of calculation in designing double-axis inertia elliptic vibrating -screen. It has also given some calculating examples and compiled corresponding computer programs, which can be applied to the research and design of vibrating-screens. According to the method presented in the paper, "PTZS" vibrating-screen with parallel motion of elliptic locus has successfully been designed and made

STUDY OF SELF-CENTERING OF SHAKER S HORIZONTAL ELLIPTIC LOCUS

Li Jun-yu Liu Qi-sin

1990, 12(4): 67-76. DOI: 10.3863/j.issn.1000-2634.1990.04.008

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This paper has pointed out that when every point on the shale shaker s frame makes elliptical locus motion round the major axis that is parallel to the shaker screen plane, the rubber belt pulley of the shaker can t make only rotation round the fixed axis (namely, self-centering). However, if we properly select the eccentric value of the belt pulley s geometric centre, the belt pulley s amplitude of oscillation will be reduced, thus operating conditions of the belt will still be improved.

ANALYSIS OF MECHANISM OF ROLLING COMMINUTION OF ROCK MATERIAL BED

Dong Ping-chuan

1990, 12(4): 77-84. DOI: 10.3863/j.issn.1000-2634.1990.04.009

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The mechanism of comminution with high pressure roller mills, which has great significance to the design and application of high pressure roller mills, is presented in this paper. The damage process of rock material bed under rolling is analyzed, and the stress and the damage morphology of particles are discussed. Then the specific work consumption of the rolling comminution of rocks is measured, and the four subpocesses in which the high pressure roller mills work are obtained.

YX METHOD—A NEW METHOD OF DETERMINING FUNCTION COEFFICIENT

Yong Qi-dong Xiao Fang-chun

1990, 12(4): 85-90. DOI: 10.3863/j.issn.1000-2634.1990.04.010

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On the basis of the concept of fuzzy subordination and measure, a new method of determining function coefficient is presented and a calculating formula for function coefficient is also derived in this paper. The characters of this method lie in that the effect of function costs on function coefficient is considered apart from the importance of every function. This method is more objective and practical than traditional methods (FD and DAER Methods).

MATCHING OF MACHINE-TOOL S GEARS WITH MICROCOMPUTERS

Zheng Hua-lin

1990, 12(4): 91-95. DOI: 10.3863/j.issn.1000-2634.1990.04.011

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In machine-manufacturing process, we often need to choose and match machine-tool s gears. Their matching with microcomputers helps to single out the gear combination with the best gear ratio from the limited spare machinetool s gears It can also help to the gear engagement function and make their optimization combination possible.

AN ALGORITHM OF PARAMETERS OF FRICTIONAL SURFACE AND THE APPLICATION OF MICROCOMPUTER

Xie Jiangsheng Ma Deyan

1990, 12(4): 96-103. DOI: 10.3863/j.issn.1000-2634.1990.04.012

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In this paper, a new algorithm of parameters of frictional surface is introduced, which is based on the least square method middle line. By ap- plying a microcomputer to the outline instrument, a lot of surace parameters are intelligently measured. By comparison with the measurement of the prototype and through the checking computation of record curves, this method is satisfactory.

A SCM DEBUGGING CARD OF APPLE Ⅱ DMA SHARING MEMORY

Chen wei Meng Dong-sheng

1990, 12(4): 104-108. DOI: 10.3863/j.issn.1000-2634.1990.04.013

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A cheap single component microcomputer(SCM)debugging card for Apple Ⅱ microcomputer is provided by this paper. The card makes full use of the system resources of microcomputer. The communication technique of DMA is adopted to achieve sharing main memory and parallel operation between SCM and 6502 CPU.

OPTIMALITY CONDITIONS FOR NONDIFFERENTIABLE FRACTIONAL MINMAX PROBLEMS WITH SATISFACTION CONDITIONS

Zhang Ji-jun

1990, 12(4): 109-120. DOI: 10.3863/j.issn.1000-2634.1990.04.014

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This paper has pointed out the mistakes in (1) and extended the prob lem discussed in (1) to nondifferentiable fractional min-max problem with satisfaction conditions. Under the weaker assumed conditions, we have discussed the optimality conditions of the extended problem in the way to be distinct from that in (1).

A SIMPLE MEASURE AND CALCULATION OF SECOND ORDER SERIES RESONANCE CIRCUIT ALL-FREQUENCY BAND

Luo Xu-guang

1990, 12(4): 121-125. DOI: 10.3863/j.issn.1000-2634.1990.04.015

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According to the definition of all-frequency band, a simple formula for measuring and calculating all-frequency band is derived in this paper, i.e. △f=fo/Q and △f=R/2πL. The former is used for measurement and the latter for calculation. The error obtained is smaller than that by the general method.

NONTRIVIAL SOLUTION TO DIRICHLET PROBLEM OF A CLASS OF QUASILINEAR ELLIPTIC EQUATIONS WITH CRITICAL EXPONENT

Jiang Xiao-tao

1990, 12(4): 126-139. DOI: 10.3863/j.issn.1000-2634.1990.04.016

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In this paper, Dirichlet problemis discussed, in which ΩcR~N is a bounded domain and f(x,u)=O(|ul~(Q-2)u)(u→∞, Q=(NP)/(N-P), N>p≥2 The auther has proved that the psoblem (*) possesses a nontrivial weak solution under given conditions of a_1(x,s) and f(x,u).

PRELIMINARY DISCUSSION ON THE APPLICATION OF ACHIEVEMENTS IN SCIENTIFIC RESEARCH OBTAINED BY COLLEGES AND UNIVERSITIES

Luo Tai-zhen

1990, 12(4): 140-146. DOI: 10.3863/j.issn.1000-2634.1990.04.017

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The commodity value, use value and exchange value of achievements in scientific research as a kind of technical commodity are discussed in this paper. The correct ways to popularize and apply the achievements obtained by colleges and universities have been proposed on the basis of discussing various potential channels to transfer the achievements into social productive force.

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