Table of Content

20 February 1986, Volume 8 Issue 1

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论文

CHARACTERISTCS OF RESERVOIR PORE DISTRIBUTION AND THEIR APPLICATION IN THE UPPER TRIASSIC YANCHANG SERIES OF SHANGANNING BASIN

Xie Qingbang Zhang Zhiguo

1986, 8(1):  1-12.  DOI: 10.3863/j.issn.1000-2634.1986.01.001

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Yangchang Series in Ansai area is characterized by low Porosity and low Permeability.This comprehensive study is based on the data obtained from the capillary pressure curvs, casting slices, Petrophysical properties, SEM and static conditions.By using the method of moment and Q-type group analysis, the reservoirs are classified, and the characteristics of the pore distribution are studied.The diagenesis is the predominant factor of forming the low permeability sandbodies and making the secondary porosity deevelop.It lays a googd foundation for increasing the economic effectiveness of the exploration and for the reserve calculation.

GEOCHEMICAL CHARACTERISTICS OF CRUDE OIL IN WESTERN LIAOHE DEPRESSION AND FORECAST OF THE PROPERTIES OF OIL AND GAS IN LIAODONGWAN DEPRESSION

Ma Qing

1986, 8(1):  13-26.  DOI: 10.3863/j.issn.1000-2634.1986.01.002

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western Liaohe depression is one of the depressions rich in oil and gas resources in China. This paper mainly studies the geochemical characteristics of oil in its western depression, classifies its oil resource and analyses the origin of all kinds of oil.The result shows : In Liaohe deprssion basin, not only the depression can be an independent source system, but also each secondary depression in it can control the formation and accumulation of oil and gas. The secondary depression is an oil-formation.

DISCUSSION OF CONODONT DEVELOPMENT AND CONDITIONS

Bao Dexian

1986, 8(1):  27-35.  DOI: 10.3863/j.issn.1000-2634.1986.01.003

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Baseed on conodont (243 Genera) evolution characteristics, the conodont evolution is considered to be in agreement with the theory of "punctuated equilibrium" which suggests that macroevolution is dominative in the creature s evolutions. Three prosperous periods of conodont have relation to Palaeomagnetism Reversal. Three failing periods of conodont are influenced by two ice ages, five sea-level changes and rainfalls in the geological history time. The extinction of conodont results from the colony extinction of conodont results from the colony extinction,dry and hot weather,and moutain-making movements etc.

UNSTEADY FLOW IN COMPLEX NATURAL-GAS PIPELINES WITH CONCENTRATED OUTFLOW (OR/AND INFLOW) DEPENDING ON TIME

Zeng Ziqiang Wang Yuchun

1986, 8(1):  36-44.  DOI: 10.3863/j.issn.1000-2634.1986.01.004

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This paper presents a mathematical model for describing theunsteady flow in complex branch-like pipelines. By applying the mathematical-physical method and making a series of strict mathematical calculations, the formula for determining the pressure which depends on pipe-length and time is obtained. For the sake of applying the formula to production practice, a computer program is compiled, and a real example and its calculation results are given.

DISCUSSION OF THE CALCULATION OF FRICTION LOSS IN TRANSITION REGION OF TURBULENT FLOW IN ISOTHEMAL OIL PIPELINES

Cao Guimo Yang Guangxi

1986, 8(1):  45-51.  DOI: 10.3863/j.issn.1000-2634.1986.01.005

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It is recommended in this paper that logd be substituted for logε in the coefficient A of the formula used at present, which is used to calculate the head loss in trnsition region of turbulent flow in isothermal oil pipelines. According to what is discussed in this paper, the result can be obtained which is high in accuracy.The formula λ=0.11 (68/(Re)+ε) ^(1/4) recommended in Reference (1)is also discussed here in passing. It is pointed out that this formula is not agreeable to the original one, and the rang of pipe diameter available is very narrow and the value of friction factor is a little high for the normal pipelines.

LABORATORY TEST OF MUD PUMP PISTON

Zhou Xirong Yang Qimin

1986, 8(1):  52-65.  DOI: 10.3863/j.issn.1000-2634.1986.01.006

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Under the laboratory conditions of 180 kg/cm² pressure, 196 s/min reciprocal time and water medium, the property test of two groups of different standards of perbunan-Cotton rubber pistons, each of which contains eight pistons, is completed in this experiment on the test bed which is developed by our research group.The test method and circumstances are presented in detail in this paper. some special relations of test process and the failure of pistons are illustrated by charts or photographs And the safety.

COMPUTER-AIDED DESIGN (CAD) OF THE SHAPING MACHINE

Wang Wei

1986, 8(1):  66-80.  DOI: 10.3863/j.issn.1000-2634.1986.01.007

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The computer-aided design (CAD)of the "kinematic analysis of planar linkage, kinetostatics", the "real motion law of machinery" and the "flyweel design" have been researched in this paper by means of a typical machine-the shaping machinep and the mathematical models and the programming method have also been given out.

GENERALIZED PLASTIC-REGION SIZE FACTOR FRACTURE CRITERION

Yang Zhou Xiao Fangchun

1986, 8(1):  81-93.  DOI: 10.3863/j.issn.1000-2634.1986.01.008

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Based on the generalized Mises yield criterion, a new combined type of fracture criterion is established which is called the generalized plastic-region size factor fracture criterion. By altering the value of parameter a, we may obtain fracture criteria which are more coincident with the engineering practice. The criterion can be also used to solve three-dimensional crack problems.

GREEN S FUNCTION WETHOD IN THE ENERGY-BAND THEORY

Luo Zhengchang

1986, 8(1):  94-102.  DOI: 10.3863/j.issn.1000-2634.1986.01.009

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Green s Function method is completely described in this paper, which is one of the important approximate methods in the enorgy-band theory.