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    20 August 1999, Volume 21 Issue 3
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    油气藏工程
    NON-LINEAR CURVE MATCHING FOR CALCULATING HYPERBOLIC DECLINE PARAMETERS
    CHEN Linyuan DU Zhimin
    1999, 21(3):  1-4.  DOI: 10.3863/j.issn.1000-2634.1999.03.001
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    The Arps equation involves exponential decline, hyperbolic decline and harmonic decline, in which the hyperbolic decline equation is widely used and can be solved in many methods. Their results are similar and reliable for oil and gas reservoir, which production strictly follows decline type.However,the difference of solutions is remarkable if reservoirs and wells do not strictly obey the decline type.To solve the problem,a pure non-linear model is developed on the basis of the Arps hyperbolic decline
    THE COMPOSITIONAL ANALYSIS FOR PRODUCTION NATURAL DECLINE
    DENG Rui-jiang LIU Yan GAO You-rui
    1999, 21(3):  5-7.  DOI: 10.3863/j.issn.1000-2634.1999.03.002
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    The paper puts forward a method of disintegrating natural decline rate into three elements and affirming each element influence level.The possible changing trend of each element is discussed.It is favorable to take stimulation with a clear aim in mind through the definition of the major element, thus the natural decline can be reduced. The level of development and the economic efficacy will be improved.
    A METHOD OF DETERMINING LOW PERMEABILITY GAS RESERVOIR PARAMETERS WITH REGRESSION TECHNIQUE
    LI Ming SUN Lei LI Shilun
    1999, 21(3):  8-11.  DOI: 10.3863/j.issn.1000-2634.1999.03.003
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    Usually, gas reservoir parameter determination must shut down gas well. In order to avoid loss,it is necessary to study a method in the light of production decline history to determine gas reservoir parameters. On the basis of Fraim work and by using regression analysis, the paper presents a set of formula which can be used to estimate the low permeability gas reservoir parameters . The formula are easy to be programmed and able to determine gas reservoir parameters rapidly and accurately.
    RESEARCH AND APPLICATION OF TEMPORARY PLUGGING SELECTIVE ZONE ACIDIZATION IN GASI OILFIELD
    LI bingyaun ZHANG Zhiquang WANG Chengwu
    1999, 21(3):  12-15.  DOI: 10.3863/j.issn.1000-2634.1999.03.004
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    The reservoir of Gasi oilfield is composed of fine sandstone beds,and the anisotropism is very serious.The different reservoir degree water sensitivity,acid, velocity and salt sensitivity. In order to improve the reservoir,through a series of experiments,the formulations for selected beds is found.The application in the oilfield shows that the acidization and temporary plug formulation is useful and the experiment has acquired good results
    RESEARCH ON DISTRIBUTION OF PERMEABILITY BY FRACTAL INTERPOLATION SURFACE
    LIU Hongqi XIA Hingquan GUO Xiao
    1999, 21(3):  16-18.  DOI: 10.3863/j.issn.1000-2634.1999.03.005
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    Basing on the fractal theory and its surface interpolation formula,a horizontal subtle distribution surface of permeability can be derived.Comparing with the Krining interpolation method, this surface can display the subtle characteristics of the reservoir permeability.Some reservoir permeability data are used to interpolate by the two methods.The formula can also be used to porosity study.
    THE MINIMUM MISCIBLE PRESSURE OF CO 2 FLOODING IN DAGANG OILFIELD
    GUO Ping ZHANG Shiyun WU Rong LI Shilun SUN Liangtian MA Lijun FENG Qingxian
    1999, 21(3):  19-21.  DOI: 10.3863/j.issn.1000-2634.1999.03.006
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    The miscible pressure is a important foundation to define miscible flooding using in the reservoir . The best method of miscible pressure determination is capillacy test.The authors forecast the minimum miscible pressure by some experience formula,and the miscible pressure of oil in five sections of Dagang oilfield is determined.Then,the authors analysis gas oil ratio,recovery ratio in different flooding volume.
    ULTRASONIC METHOD FOR DETECTING THE PHASE TRANSITION OF GAS IN POROUS MEDIA
    YANG Jinhai LI Shilun SUN Liangtian SUN Lei Guo Ping
    1999, 21(3):  22-24.  DOI: 10.3863/j.issn.1000-2634.1999.03.007
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    Based on the Boit theory on acoustic propagation in porous media, ultrasonic method to determine the saturation vapor pressure of CO 2 has been investigated . As a result the speed and the attenuation of ultrasonic wave are very sensitive to the phase transitions of CO 2 in a PV cylinder both with and without porous media. Moreover it is indicated that porous media might affected the saturation vapor pressure of CO 2 to some extent.

    AN EXPERIMENTAL STUDY ON THE PREDICTION OF FORMATION ROCK HARDNESS BY USING THE ACOUSTIC VELOCITY
    ZHAO Xiuju li Chuncheng LI Zukui YAN Jing
    1999, 21(3):  25-27.  DOI: 10.3863/j.issn.1000-2634.1999.03.008
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    On the basis of briefly describing the method for measuring acoustic velocities of rocks and rock hardness in the laboratory, this paper introduces the correlation between acoustic velocity and rock hardness as well as the correlation between the acoustic velocity on the surface and that from downhole logging by using regression analyis.Based on the comprehensive analysis and study,the paper describes the mathematical models established for field use to predict formation rock hardness by means of acoustic ...
    石油地质勘探
    LOWER PALEOZOIC SEQUENCE STRATIGRAPHY OF DONGBU ARCH,LIAHE DEPRESSION
    LI Ling FANG Shaoxian WANG Xingzhi HOU Fanghao LI Yanjun LIU Xiaofeng WANG Guochun ZHAO Chuiling SUN Suqing GAO Ming
    1999, 21(3):  28-31.  DOI: 10.3863/j.issn.1000-2634.1999.03.009
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    By using the data of outcrops,cores and seismic sections,the authors have discussed the Lower Paleozoic sequence stratigraphy of Dongbu arch, Liaohe depression.One first order sequence,two second order sequences and thirteen to fourteen third order sequences are recognized in the study area, which compose of the sequence stratigraphy framework.The research shows that the source rock,reservoir and cover rock have closely relationship with the different system tracts of sequence.
    AN ANALYSIS OF SEISMIC AND SEDIMENTARY FACIES OF UPPER XISHANYAO FORMATION IN SB AREA OF TURPAN-HAMI BASIN
    SHEN Shou-wen PENG Da-jun YAN Qi-bin HUANG Xian-lu LI Zhi-jun HU Jun
    1999, 21(3):  32-36.  DOI: 10.3863/j.issn.1000-2634.1999.03.010
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    Seismic facies analysis of upper Xishanyao Fm. In SB area of Turpan-Hami basin was made on the four seismic parameters-frequency,amplitude, continuity and reflection structure.The map of seismic facies in the area was also drawn.The seismic facies has been transferred into sedimentary facies after interpretation.It is shown that braid river delta , mere and aphytal are main sedimentary facies in the study area during late Xishanyao period,Jurassic.
    钻采工艺与设备
    ANALYSIS AND CALCULATION OF CASING COLLAPSE RESISTANCE
    DU Chunchang XIE Guangping LIU Chongjian
    1999, 21(3):  37-40.  DOI: 10.3863/j.issn.1000-2634.1999.03.011
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    According to bending theory , the authors set up the casing mechanical model under nonuniform collapse ,which is solved by using canonical equation and the distribution of bending moment,shear force,axial force,stress and deformation on the circumference of casing under nonuniform collapse.Calculation shows that the casing collapse resistance decreases greatly under nonuniform loads.Model not only shows good casing collapse mechanism,but also can improve casing collapse resistance design.
    PERMANENT DOWNHOLE GAUGES TEST ANALYSIS
    DUAN Yonggang CHEN Wei ZHAO Gang SENG Zhongxian
    1999, 21(3):  41-43.  DOI: 10.3863/j.issn.1000-2634.1999.03.012
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    A new method of monitoring reservoir in oil field developing evening is by use of permanent downhole gauges(PDG) to measure the variance of pressure. The result of which will play an important role in characteristic of PDG long test time, the mathematics model of PDG has been established at variance rate condition.The algorithms of numerical Laplace transform are used to calculate pressure response quickly,and the full pressure history was matched automatically by nonlinear optimization to estimate reservoi...
    PERFORATING PARAMETERS CHOOSING FOR GAS WELL
    LIN Qi LIN Yang-ping LI Ji SONG Dong-bin
    1999, 21(3):  44-46.  DOI: 10.3863/j.issn.1000-2634.1999.03.013
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    Perforation is a key effect for gas well production.It is extremely important to choose reasonable perforating parameters.The seepage character and the parameters of gas well are different with that of oil well.This paper ,based on the seepage law of gas well and the characteristic of mud contamination in gas formation,analysis the gas well production affected by perforating parameters,and make a calculating example. The paper put forwards that near wellbore the production is more strongly affected by the p...
    ABRASIVE TESTS FOR THE HARD ALLOY WELDED ON THE BIT TEETH
    TANG Xiao-wen HUANG Ben-sheng YANG Mei WANG Zi-yu
    1999, 21(3):  47-49.  DOI: 10.3863/j.issn.1000-2634.1999.03.014
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    For the purpose of selecting the better strengthening material welded on bit teeth,the various sizes of spheroidal sintering tungsten carbide and the granular casting tungsten carbide were tested by abrasive wear,to estimate their wear resistance.Using the Nickel base metal as solder,the hard alloy was welled on the 20 Ni 4 Mo in fine vacuum.The test was performed on a series of shock loads,the abrasive consists of quartz sands,water annd a little suspension.The friction loss was weighted in the balance.It ...
    APPLICATION OF GRAY DYNAMIC MODEL IN PREDICTING CORROSION OF GAS PIPELINE
    XIE Ying YUAN Zong-ming
    1999, 21(3):  50-51.  DOI: 10.3863/j.issn.1000-2634.1999.03.015
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    In gas pipeline , many factors can cause corrosion and are very complex.Corrosion rate and corrosive depth are gray varibles with time.In order to predicting corrosive condition and mastering the fundamental corrosive law in gas pipeline,this paper matched the statistical data of corrosive rate and corrosive depth by using GM model in gray system theory,and built the corresponding gray differential equation and gray time responding function,corrosive rate and depth in Sichuan gas pipeline have been predicte...
    THE OPTIMAL DESIGN OF CRUDE OIL GATHERING LINE NETWORK
    HAN Jianzeng WANG Yuchun
    1999, 21(3):  52-55.  DOI: 10.3863/j.issn.1000-2634.1999.03.016
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    On the bases of both the line transportation theory and the optimization design theory,a multilevel optimization method is developed,which divides the whole problem into four sub-problems:(1)the optimal design of the groups of oil wells,(2)the optimal design of the location of oil gathering stations,(3)the optimal design of the layout of crude oil gathering line network system,(4)the optimal design of the parameters of the gathering line network system.They are linked together by certain parameters.For each...
    化学工程
    COMPLEX SURFACTANT SYSTEM-A NEW TYPE OF RHEOLOGY CONTROLLER
    GUO Yongjun LI Jian
    1999, 21(3):  56-59.  DOI: 10.3863/j.issn.1000-2634.1999.03.017
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    Complex surfactant systems are mixtures of long chain alkyl quaternary salts or long chain alkyl pyridine chloride with sodium salicylate; of anionic surfactants with cationic surfactants and of some zwitterionic surfactants with cosurfactants, anionic and cationic surfactants. The solution of the system takes on high viscosity, notable viscoelastical property and shear thinning behavior. The new type of rheology controller has its application potential in drilling, Enhanced Oil Recovery (EOR) and liquid tr...
    A NEW SYNTHETIC METHOD OF CATIONIC MONOMER DIETHYLAMMONIUM CHLORIDE
    JIA Zhaoxia ZHENG Yan
    1999, 21(3):  60-61.  DOI: 10.3863/j.issn.1000-2634.1999.03.018
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    For selecting of reactants and synthetic condition, the principle of nucleophilic reaction between alkyl chloride and diethylamine is discussed briefly. The effect of solvents, reaction conditions and reactants ratio on the reaction was studied comprehensively. A new method of synthesis of diethylammonium chloride (DEDAAC) was presented as follows: using "one pot reaction" process to simplify the steps of the reaction; using water-alcohol mixture solvent to enhance its polarity in homogeneous condition; ope...
    EXPERIMENTAL STUDY OF MULTI-FUNCTIONAL MUD ADDITIVE SPAMH
    WANG Pingquan YANG Biao LI Chunxia
    1999, 21(3):  61-65.  DOI: 10.3863/j.issn.1000-2634.1999.03.019
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    This paper describes the experimental study of multi-functional mud additive SPAMH.The experimental results show that SPAMH is capable of reducing filtration and viscosity,anti-temperature,anti-salt and anti-calcium,and has high thermal stability,low cost,strong inhibition.Its performances are remarkablely better than that of SPNH.
    APPLICATION OF CHLORINE DIOXIDE ON WATERFLOOD RECOVERY
    ZHAO Xiaodong
    1999, 21(3):  66-69.  DOI: 10.3863/j.issn.1000-2634.1999.03.020
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    Data from production and experiments show that aqueous solution of chlorine dioxide can completely remove the plugging of ferrous sulfide, biomass residues and polymers present in production and waterflood well. Investigation on mechanism has indicated that the chlorine dioxide can oxidate these plugging into soluble and hydrophilic substance. A method of manufacturing cheap, available and suitable chlorine dioxide is suggested.
    DESULFURIZATION IN PETROLEUM REFINING
    FENG Rui YANG Xud
    1999, 21(3):  70-73.  DOI: 10.3863/j.issn.1000-2634.1999.03.021
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    The possibility of application of biochemical method on desulfurization technique is discussed. Although desulfurization from crude oil by caustic soda is simple, it has low sulfide removal efficiency and produces a large quantity of waste water after treatment. The application of biochemical method has modified this situation. In addition, this technology shows good prospects in removing sulfide coming from waste water and oil products. It can simplify the treating process, lower the cost and prevents effe...
    计算机与基础研究
    PROGRAM REALIZATION OF GENERAL DATA IMPORT SOFTWARE IN ENGINEERING
    TIAN Jidong ZHAO Jinzhou
    1999, 21(3):  74-77.  DOI: 10.3863/j.issn.1000-2634.1999.03.022
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    In developing engineering software,import parameters have the same properties.After parameters classify,properties description of parameters can be preserved in a text file. Under the corner description method, a structure data type in program corresponding parameter properties is definited to record parameter properties and to control program action,the general data import is realized .This realization provides standard package for engineering personnel to develop high quality program.By the aid of such c...
    APPLICATION OF SELF-ORGANIZING FEATURE MAP NEURAL NETWORK IN LITHOLOGICAL IDENTIFICATION
    LIN Wanchang CHENG Wenbin TIAN Jidong
    1999, 21(3):  78-80.  DOI: 10.3863/j.issn.1000-2634.1999.03.023
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    neural network; lithological identification; pattern recognition; cluster analysis
    THE FAST AIGORITHM FOR AULTIPLICATION OF THE TOEPLITZ MATRICES
    HE Cheng-cai
    1999, 21(3):  81-82.  DOI: 10.3863/j.issn.1000-2634.1999.03.024
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    The author gives the fast algorithm for multiplication of two n-order Toeplitz matrices.The complexity of this algorithm is 0(2n 2 ).
    THE ECONOMIC ANALYSIS OF CNG STATION AND CNG VEHICLE
    TANG Xiao-dong WEN Fu-sheng ZHANG Bin
    1999, 21(3):  83-85.  DOI: 10.3863/j.issn.1000-2634.1999.03.025
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    Natural gas is a clean auto fuel alternative.This paper estimates the economics of CNG(compressed natural gas) station and CNG vehicle.It introduces that CNG is benefit to society and environmental protection.
    经济管理
    DEMAND ANALYSIS OF OIL PRODUCT MARKETS IN SW CHINA
    HU Guo-song CHEN Bing ZHENG Shou-chun
    1999, 21(3):  86-89.  DOI: 10.3863/j.issn.1000-2634.1999.03.026
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    We hereby take the samples of the markets in Sichuan,Chongqing,Yunnan and Guizhou,and give a full analysis of the status quo and features in demand and supply in SW China.According to the principles of energy economics,we also deal with its demand,supply structure and price trend in the future.We finally draw the conclusion that the demand for oil will increase rapidly with the development of the economy,and will also has the stable demand with the price rising steadily.