Journal of Southwest Petroleum University(Science & Technology Edition)

EVALUATION OF GAS RESFRVOIR OF UPPER TRIASSIC IN ZITONG REGION OF NORTHWEST SICHUAN

Zhang Kai-hong

1992, 14(2): 1-8. DOI: 10.3863/j.issn.1000-2634.1992.02.01

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Based on the evolution of geologic history and the reconstruction of sedimentary process, temperature change, and gas generation, this paper calculates by improved TTI method the volume of gas generated in Upper Triassic in Zitong region of Northwest Sichuan .basin .According to the volume calculated as well as the geologic characteristics of this region, this paper evaluates the gas richness in Upper Triassic.The method of evaluating gas resources of coal measure strata introduced here can be commonly applied in other similar regions.

STUDY OF DIAGENESIS OF JURASSIC SYSTEM IN TURPAN-HAMI BASIN

Mu Shu-guang Fang Shao-xian

1992, 14(2): 9-16. DOI: 10.3863/j.issn.1000-2634.1992.02.02

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Jurassic system consists of a series of terrigenous clastic rocks wholly in Turpan-Hami basin .The complicated diagenesis has entirely changed the original texture of t$e rocks, and greatly affected the characteristics of reservoirs.It is evidently concluded that Jurassic rocks in this area have undergone burial diagenesis, and can be classified as B sub-period of eo6enetic,A sub-period of telogenetic and epidiagentic stages.

PALAOHYDROGEOLOGIC ANALYSIS OF FORMATION，PRESERVATION AND DISRUPTION OF OIL/GAS FIELD IN BIYANG DEPRESSION

Wang Wen-bin Zhou Liiu-ji

1992, 14(2): 17-29. DOI: 10.3863/j.issn.1000-2634.1992.02.03

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The formation, movement，accumulation ,and dispersion of oil/gas have close relation with palao-groundwater.So it is very necessary to study palaohydrogeologic problems of oil/gas-bearing basin,This paper first describes the characteristics of geology and petroleum geology, then classifies the palaohydrogeologic periods，and then analyzes palaohydrogeologic conditions of formation, preservation and disruption of oif/gas field in Biyang depression,especially the characteristics of palaohydrodynamic field during(and after) oil/gas formation stage, and the relation between palaohydrodynamic field and distribution of oil/gad dipoSits,It has been proved that palaqhydrogeologic

CHOICE OF FORMATION IN OLD WELLS OF CARBONATE ROCKS BY MEANS OF LOG DATA

Deng Liang-quan

1992, 14(2): 30-38. DOI: 10.3863/j.issn.1000-2634.1992.02.04

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A whole set of log explanaticrs for old sells in Sichuan where the data are not enough is presented in this paper.On the basis of dividing permeable formations qualitatively and judging oil-gas formations quantitatively, the concept of elcctrcde relative value of limestone is presented here for the first time, which is used to divide gas or water formations semiquantitatively,calculate pcrosity, permeability and oil saturation of reservoirs, divide gas-water formations quantitatively，and determine classification evaluation criterions of gas formations .The set of log explanations is believable and feasible for the purpose of reservoir evaluation, and the choice and reproduction of
formations in old wells of carbonate rocks in Sichuan.

EXPERIMENTAL STUDY OF THREE-PHASE RELATIVE PERMEABILITY OF WINSOR一IiI TYPE MICELLAR FLUIDS

Ye Zhong-bin Peng Ke-zong

1992, 14(2): 39-47. DOI: 10.3863/j.issn.1000-2634.1992.02.05

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Three-phase relative permeability measurements are made experimentally by the steady-state method for WINSOR-III type micellar fluids.Comparisons are made between the two ways("O/M; W" and "O/M+M/Wn)by which the three-phase relative permeability curves are obtained ,The characteristics of the shape of the curves have been recogiused .Preliminary study of the effects of IFT and flow rate on the three-phase flow behavior has been made .It is established that phase saturations can be calculated from fractional flow rate for steadystate flow under ultra low IFT conditions.

ESTABLISHMENT OF EMPERICAL EQUATION FOR RELATIVE PERMEABILITY CURVES OF THREE-PHASE FLOW (WINSOR-III TYPE MICELLAR FLUIDS)

Peng Ke-zong Ye Zhong-bin

1992, 14(2): 48-53. DOI: 10.3863/j.issn.1000-2634.1992.02.06

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The way, adopted by the VIPUT/CHEM simulator, that deals with relafive permeabilities of three-phase flow of micellar fluids has been discussed and analyzed.Mathematical statistics applied，emperical equations have been formulated for the threephase relative permeability curves that are . suitable for microemulsion flooding in "L" formation in Yumen oilfield.

NUMERICAL SIMULATION FOR PSEUDO-THRET-DIMENSIONAL FRACTURE EXTENSION IN FRACTURING

Hu Yong-quan Ren Shu-quan

1992, 14(2): 54-62. DOI: 10.3863/j.issn.1000-2634.1992.02.07

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Pseudo-three-dihiensioital macliematical model has Cended to be used for fitting the design of fracturing to the actual situation more in the past few years, Based on I.D, Palmer，s”fracture height”model and linear elastic fracture mechanism, the mathematical model is established，which is suitable for fracturing in layers. The function of fracture size and time in the process of fracture extension is given in this paper,

HYDRODYNAMIC DEPOSITIONAL PROPERTIES OF MULTI-DISPERSED SUSPENDED MATTER

Pu Chun-sheng Zhang Shao-huai

1992, 14(2): 63-70. DOI: 10.3863/j.issn.1000-2634.1992.02.08

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The Lagrangian method is used to describe the trajectories of multidispersed suspended particles moving near a spherical collector and to study the microscopic hydrodynamic depositional properties of the particles.The judgement conditions for five different depositional patterns are given.Through the correction for the flow field, the relationship between the microscopic change of the particle concentration and the local depositional properties is obtained.

INVESTMENT APPRAISAL ANALYSIS OF OIL DEVELOP1vIENT PROJECTS

Huang Yu Li Ze-nong Jin Feng-lan

1992, 14(2): 71-78. DOI: 10.3863/j.issn.1000-2634.1992.02.09

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This paper presents an investment appraisal analysis method for oil development pro ject .The main contents are，an objective system for evaluating investment benefits of an oil development pro ject; a universal method measuring the different objectives; a method for weighing the objective system; a method for calculating the general investment benefits of an oil development project .An example is also given in the paper.

WEAR TEST MACHINERY OF COMPLEX MOTION AND ITS KINEMATIC ANALYSIS

Hua Yin-chu Liu Ming-ge

1992, 14(2): 79-83. DOI: 10.3863/j.issn.1000-2634.1992.02.10

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This paper introduces a kind of machinery which can simulate the wear conditions or mwingparts in relatively complex motion, analyzes its trace velocity, and acceleration by means of the drawing method and analysis method, and prints s-t,v-t, a-t curves with the help of a computer, On the basis of it，a wear testing machine is designed to study the wear forms of,various moving parts made from different materials in complex motion

DIFFERENCE EQUATIONS FOR SOLVING DEFLECTION OF BEAMS WITH STEP MODEL

Wang Wei Yuan Xiang-zhong

1992, 14(2): 84-89. DOI: 10.3863/j.issn.1000-2634.1992.02.11

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In this pager, a second order difference equation is deduced by expanding only the deflection of a beam on one side of the step point .The exact resups of the deflection of the beams, without the distributed forces acting on,
can be obtained in terms of only one or two equations, It is because in this case the difference accuracy of the equation is independent of the length of the difference step.

AN EXCELLENT FOAIVIING AGENT REMOVING LIQUID FROM GAS WELL

Zhao Xiao-dong Yin Zhong Yu Ping-ren

1992, 14(2): 90-98. DOI: 10.3863/j.issn.1000-2634.1992.02.12

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CZP, which is made from agricultrual by-products, is a foaming agent for removing liquid from gas well.By laboratory evaluation and field experiment, it is shown that CZP has a powerful foaming effect, possesses good foam stability, carries large quantities of liquid and is widely adaptable under conditions of gas well .It may be used to remove liquid from gas wells which contain 70-90%gas condensates, or high content of sulfides, and used in the sulfur-bearing gas wells more than 3000 m deep as well as in general gas wells.It is a cheap excellent foaming agent for gas wells.

HYDRATION RATE OF CLASS G OIL一WELL CEMENT MEASURED BY ELECTRICAL CONDUCTANCE

Yao Xiao Duan Lingli

1992, 14(2): 99-104. DOI: 10.3863/j.issn.1000-2634.1992.02.13

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The hydration rate of Class G net oil-well cement slurry and the slurry with retarder tartaric arid is measured respectively by the meth ods of electricai conductance and acidity, and then the retardation mechanis of tartaric acid is discussed.Experiment results show that the method of electrical conductance can illustrate the hydration prcccss of oil一well cement more thoroughly and mere really than that of acidity.

DETERMINATION OF CONCENTRATtON OF POLYACRYLAMIDE-AN IMPROVEMENT ON IODINE-STARCH COLORIMETRIC METHOD

Yang Shi-guang Yang-Lin Rao Xiao-tong

1992, 14(2): 105-110. DOI: 10.3863/j.issn.1000-2634.1992.02.14

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A method for analyzing the concentration of polyacrylamide, which is based on the iodine-starch, is developed FeSO4, used as reductant and NH4HF2 as masking agent，the concentration of polyacrylamide may be determined within 0-24 ppm while by the old method within 0-6 ppm Especially, this method almost is not affected by the room temperature
15-300C and has a better reappearance.

FIRST ORDER ε-DIRECTIONAL DERIVATIVE OF MARGINAL FUNCTION QF A QUADRIC CONVEX PROGRAMMING

Zhang Ming-quan

1992, 14(2): 111-116. DOI: 10.3863/j.issn.1000-2634.1992.02.15

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In paper(1)，the ε-directional derivatives of a marginal function in convex programming with linear constraints had been discussed, Based on that，We have proved the。一differentiability of the marginal function of a quadric
convex programming in this paper, and further expressed the first order ε-directional derivative as the optimal value of a nonlinear programming.

CALCULATON FORMULA FOR GAS LEAK POSITION IN GAS TRANSMISSION PIPELINE NETWORKS

Jiang Mao-ze

1992, 14(2): 117-123. DOI: 10.3863/j.issn.1000-2634.1992.02.16

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In Reference(1), a calculation formula for gas leak position is obtained by using Laplace Transform，but its result is wrong by checking, In this paper,according to the general model, an approximate calculation formula for gas leak position and gas leak flow in pipeline networks is obtained by using asymptotic methods of Laplace Transform, This formula is simple in measurement and calculation, and is suitable for gas leak problems of complex pipeline networks.

INITIAL BOUNDARY VALUE PROBLEIVFOR A CLASS OF GENERAL COUPLED SCHRODINGER KLEIN-GORDON EQUATIONS

Jiang Xiao-tao Hu Yue

1992, 14(2): 124-134. DOI: 10.3863/j.issn.1000-2634.1992.02.17

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The initial-boundary-value problem for a class of general coupled Schrodinger-Klein-Gordon equations is considered in this paper, Under weak conditions, the existence of the global weak solution to the problem is proved
by applying Galerkin method and the principle of compactness,
Schrodinger-Klein-Gordon equation;Initiel-boundsry-value problem;Global

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