Loading...
Office Online
Journal Online

Table of Content

    20 April 2006, Volume 28 Issue 2
    Previous Issue    Next Issue
    地质勘探
    RESEARCH ON THE RELATION OF UNCONFORMITY TYPE WITH OIL AND GAS MIGRATION-ACCUMULA-TION AT ZHUENGAER BASIN
    GUO Wei-hua MOU Zhong-hai ZHAO Wei-dun et al
    2006, 28(2):  1-3.  DOI: 10.3863/j.issn.1000-2634.2006.02.001
    Asbtract ( 1766 )   PDF (353KB) ( 675 )  
    Related Articles | Metrics
    According to the actual unconformity data of Zhuengaer Basin and the relation of lap-erosion on the upper or lower part of unconformity layer, a new kind of unconformity type demarcation project has been put forward. This kind of project has divided the line unconformity as four kinds of types; onlap/erosion truncation type, concordance/erosion truncation type, onlap/con-cordance type, concordance/concordance type. On the basis of research on the relation of unconformity type with oil-gas migra-lion-accumulation，the upper or lower part of onlap/erosion truncation type are best of all favorableness for accumulation of oil and gas; the upper part of concordance/erosion truncation
    type are favorableness for migration of oil and gas , the lower part are favorableness for accumulation of oil and gas;the upper part of onlap/concordance type are favorableness for accumulation of oil and gas, the lower part are favorableness for migration of oil and gas; the upper or lower part of concordance/concordance type are favorableness for而gration of oil and gas，and favorableness for accumulation of oil and gas if the match of fault and fold.
    ANALYSIS ON SEDiNIENTARY SYSTEM AND RESER-VOIR ARCHIITEFCTURE OF DELTA-SHALLOW LAKE FACIES OF FANZHUANG IN JINHU DEPRESSION
    LIAO Guang-ming ZHONG Si-ying DING Jia-qiang et al.
    2006, 28(2):  4-7.  DOI: 10.3863/j.issn.1000-2634.2006.02.002
    Asbtract ( 1368 )   PDF (688KB) ( 677 )  
    Related Articles | Metrics
    Because of Yizheng orogeny in Late Cretaceous and Wubao orogeny during Himalayan movemenent of Cenozoic era, delta-shallow lake facies system in Fanzhuang was deposited by rifting and rise of sedimentary base level in Jinhu depression. Because of biotic classic limestone, beach bar and distributary mouth bar with thick sand and better physical property, which lies on the
    top of sedimentary layers, and being close to oil source rock,they are the beneficial reservoirs. By hierarchy analysis, tentypes of architecture elements have been recognized in delta-shallow lake facies system. On the horizontal section , there are two models of architectural elements stacked form. On the verti-cal section, there are three models of architectural elements stacked form.
    RESEARCH OF SEISIMIC PREDICTION OF SAND-STONE RESERVOIR OF T3X IN LIANGDONGMIAO
    2006, 28(2):  8-10.  DOI: 10.3863/j.issn.1000-2634.2006.02.003
    Asbtract ( 983 )   PDF (782KB) ( 627 )  
    Related Articles | Metrics
    The T3 X of Liangdongmiao is a set of land face clastic sedi-ment in which shale interlace with sandstone. By the analyzing of logging, we known the difference between the velocity of the sandstone reservoir which contain gas and the velocity of shale is not clearly. It is hard to solve the problem that about reservoir prediction and identify hydrocarbon by means of velocity inver-
    sion. By the analyzing of logs, we known that sandstone reser-voir has the character of low GR and relatively higher porosity.We can use GR to interpret the lithology, and porosity data to tdentify possible reservoir which have relatively higher porosity.In the end，the abnormity of low velocity is used to predict the gas in sandstone. Through the research of reservoir prediction for
    T,X of Liangdongmiao, a good geological result is received, and this has a guidable meaning on the exploration in the area.
    DIAGENFSIS IN THE 2-SECTION OF JIALING.nANG OF THE TRANSITIIONED ZONE BETWEEN THE CENTER PART AND THE SOUTHERN PART OF SICHUAN BASINAND ITS EFFECT TO RESERVOIR DEVELOPMENT
    ZHOU Yue-zong LEI Bian-jun ZHAO Yong-gang et al
    2006, 28(2):  11-15.  DOI: 10.3863/j.issn.1000-2634.2006.02.004
    Asbtract ( 1171 )   PDF (630KB) ( 675 )  
    Related Articles | Metrics
    The 2-section of Jialingjiang project belongs to strict and evaporated platform facies. Its main lithology is dolomite, gypsepus rock, limestone and a spot of pulpy rock. Arenite dolomite,politic dolomite, silty dolomite, silty-fine dolomite, politic lime-stone and arenite are of reservoir signification. The 2-section ofJiaLingjiang project has developed from seabed diagenesis，evaporated diagenesis, mixed water diagenesis, shallow-water,middle-water diagenesis environment and deep-water diagenesisenvironment. Early fresh-water leaching, near-surface(evaporating bump and refluent penetration)dolomitization, corrosion which is related to organic evolvement are the main member constructed diagenesis. The tectonic fracture has made its permea-
    bility better. Besides, the compaction, pressolution，twice gypsum cementation are the 2-section of Jialingjiang project's main destructed diagenesis. The 2-section of Jialingjiang project has two types of studded carbonate rock and non-studded carbonate rock, which have 6 kind of lithology. This paper has created their diagenesis serial and the pore evolving mode.
    JURASSIC SEQUENCE STRATUGRAPHY IN WESTERN SICHUAN FORELAND BASIN, CHINA
    HU Xiao-qiang CHEN Hong-de JI Xiang-tian et al.
    2006, 28(2):  16-19.  DOI: 10.3863/j.issn.1000-2634.2006.02.005
    Asbtract ( 841 )   PDF (401KB) ( 890 )  
    Related Articles | Metrics
    The Jurassic in the West Sichuan Foreland Basin is continental detrital sedimentary strata, within which the recognizable sequence boundaries include uncomformity and erosional deposi-lion break, and lake-flooding surface. In order to overcome the limitation of these tow sequence boundaries in the continental strata studies, the authors introduce the concepts of the largest progradational surface and the largest lake-flooding surface. The
    largest progradational surface is just the largest erosional surface or even the unconformity, and the largest retrograding surface is just coupled by the largest lake-flooding surface. Taking the system tracts as the basic consisted units within the sedimentary sequences，in the light of progradational system tracks and retro-grading system tracks，the authors divide the Jurassic of West Sichuan Foreland Basin into 8 sequences, which can be correlaled within the whole basin. Since the progradational system tracks represent the products during the period from weak to strong structural activity, and also because the development of delta sediments is one of the important criteria of the progradational system tracks, so the sequence subdivision scheme is of
    significance to guide petroleum exploration.
    THE STRUCTURE ANALYSIS OF TWO-DIMENSIONAL SEISMIC PROFILE TO THE MIDDLE SECTION OF LONGMEN MOUNTAIN ANTERIOR MARGIN
    LI Shu-bing; CHEN Wei JIAN Gao-ming et al.
    2006, 28(2):  20-24.  DOI: 10.3863/j.issn.1000-2634.2006.02.006
    Asbtract ( 1866 )   PDF (1102KB) ( 744 )  
    Related Articles | Metrics
    Cifengchang-Yazihe structure is the thrust unit of middle section of Longmen Mountain anterior area adjacent to the east margin of Tibetan plateau. There were plenty of perdu hydrocarbon tectonic traps in its footwall, and it's the very important exploration destination on the hill side of foreland basin. By applying the geometry deformation methods of modern tectonics，we built up the structure deform types and assemble style of Cifengchang-Yazihe seismic exploration area from the deep subterranean to the ground，so does the corresponding structure mode. By means of geologic profile forward modeling technique，we validated the rationality of the structure mode, represented
    the process of structure evolution happened in the anterior area of middle section of Longmen Mountain. Using visible computer mapping techniques, we analyzed the three-dimensional charac-teas of two dimensional seismic work area, and built the three-dimensional mode.
    THE TECHNIQUE ON ACIDOLYZED HYDROCARBON IN ROCK APPLYING IN IDENTIFICATION OF GASSY FORMATION IN BASIN SONGLIAO
    ZHU Shi-quan PENG Wei LUO Zhi et al.
    2006, 28(2):  25-26.  DOI: 10.3863/j.issn.1000-2634.2006.02.007
    Asbtract ( 776 )   PDF (247KB) ( 686 )  
    Related Articles | Metrics
    Chemical exploration technique on acidolyzed hydrocarbon in rock in deep well has been applied in many aspects, such as identification gassy formation，research for migration of hydrocarbon , evaluation source rock , contrast gas with source rock and so on. The technique can offer direct information on conditions of reservoir formation and evaluate exploration region. By combi-
    nation this technique with wire-line logs, improving capability of identification gassy formation, and the technique efficiency has been approved by result of oil(gas-testing. The technique can also reduce workload of oil(gas)-testing, and improve geolog-ical effect of oil(gas)-testing, and save large fund of explora-lion and exploitation.
    FUNCTIONS OF FAULTS IN PETROLEUM ACCUMU-LATION IN DONGXIN SHALLOW LAYER
    SHIXiu-Juan; LI Ji-hong LIU Ke-qi.
    2006, 28(2):  27-31.  DOI: 10.3863/j.issn.1000-2634.2006.02.008
    Asbtract ( 919 )   PDF (450KB) ( 629 )  
    Related Articles | Metrics
    There are four kinds of Fault block models in Dongxin shallow layer, ie. parallel, circular-radial, pinnate, and fastigiate fault block. The migration performance of faults is affected byfault level , cycle of fault activity , and fault attitude. The second and third class faults linking shallow layer with source rock controts the migration of oil and gas. The periodic activity of fault controls the periodic vertical migration of petroleum along the fault. There are five kinds of fault attitude, ie. synthetic，antithetic , graben , horst , and”y" type fault attitude. The sealing performance of fault is affected by fault nature, fault displace-
    ment, fault attitude, the contact between hanging wall and foot wall, etc. The sealing performance of fault can be judged by fill-ings in fault zone, the sand-mud ratio of the fractured layer, the dip of the fractured surface, pore fluid pressure, the vertical variance of pressure coefficient and geothermal gradient, etc.
    石油与天然气工程
    ALGORTTHM FOR CONSTRUCTING PEBI MESH OF ARBITRARILY SHAPED AND CONSTRAINED PLANAR DOMAINS IN OIL RESERVOIR
    XIANG Zu-ping ZHANG Lie-hui CHEN Zhong-hua et al.
    2006, 28(2):  32-35.  DOI: 10.3863/j.issn.1000-2634.2006.02.009
    Asbtract ( 779 )   PDF (519KB) ( 728 )  
    Related Articles | Metrics
    An algorithm for constructing PEBI mesh of arbitrarily shaped and constrained planar domains was presented. When it acted on polygonal domain, all the vertices of boundary edges and scattered points within the domain were sorted in scan man-ner. Each time a feasible vertex was taken to generate a new triangle on known edge, then scanning these triangles which didn't
    meet the Delaunay rule in these new triangles and continually dealt with them until the whole domain is triangulated. Finally, connecting each circumcircle center of these triangles, PEBI mesh~generated. Elasticity smoothing and swapping diagonal of quadrilateral methods were applied to locally optimize the cell form.By plan mapping, It could be applied to 3D mesh of reservoir. Ap-
    placation of the method was proven that it was practicable.
    FRACTURED WELL EIGENVALUE WELL TEST IN-TERPRETATION METHOD
    WANG Nu-tao CHEN Hao ZHANG Ai-hong et al.
    2006, 28(2):  36-39.  DOI: 10.3863/j.issn.1000-2634.2006.02.010
    Asbtract ( 848 )   PDF (212KB) ( 657 )  
    Related Articles | Metrics
    This paper extends Tiab's direct analysis technique to finite conductivity hydraulic fracture well interpretation. This technique makes use of log-log plots pressure and pressure derivative characteristic analyses without using the typical curve matching and regression analysis，especially fractured well application typical curve matching needs a great many typical curves family.
    Through the case analysis, account the means simplicity, apply credibility.
    RESEARCH OF THE SELECTIVE WATER PLUGGING ACHIEVED BY THE TEMPORARY PLUGGING TECH-NOLOGY
    WANG Lei ZHAO Li-qiang LIU Ping-Li et al.
    2006, 28(2):  40-43.  DOI: 10.3863/j.issn.1000-2634.2006.02.011
    Asbtract ( 908 )   PDF (368KB) ( 636 )  
    Related Articles | Metrics
    According to the nontarget formation damage caused by the water plugging and injection conformance, it was proved from the theory that the plugging agent would damage the nontarget formalion unless it could be protected. The above results often caused the taken measure to lose its effect and even the damage. Applying the theory that the injected gel easily forms the temporary
    plugging on the injection side, we developed the temporary plugging agent that gelling time and gel time could be controlled,and the temporary plugging agent was applied with the followed plugging agent. The core flooding experiment indicated that the method could make most of injected plugging agent enter the high permeability formation, so it would reduce the damage of
    nontarget formation.
    STUDY OF THE SEEP MECHANISM OF STEAM AS-SISTED GRAVITY DRAINAGE
    WANG Xuan-ru; CHENG Lin-song LIU Shuang-quan et al.
    2006, 28(2):  44-47.  DOI: 10.3863/j.issn.1000-2634.2006.02.012
    Asbtract ( 1032 )   PDF (464KB) ( 617 )  
    Related Articles | Metrics
    Steam Assisted Gravity Draining(SAGD ) has been proved to be an effective way for extra heavy oil, supper heavy oil re-covery. Aiming at the commonly used two well configurations namely double horizontal wells and the combination of vertical and horizontal wells, this paper gained the maps of temperature field , pressure field , and residual oil saturation field of the
    steam chamber section at the initial stage, the fastigium stage and the evening stage. These maps intuitively and visually char-acterized the forming and expanding process of the steam cham-ber and the shape and the drainage mechanism at the different drainage moments. Further more, this paper also made a com-parison between the two well configurations and these provided a theoretic foundation for the expansion of SAGD.
    EXPERIMENT AND ANALYSIS OF OIL/GAS/WATER MULTI-PHASE BEHAVIOR OF CONDENSATE GAS RESERVOIR
    PAN Yi SUN Lei LUO Li-qiong et al.
    2006, 28(2):  48-51.  DOI: 10.3863/j.issn.1000-2634.2006.02.013
    Asbtract ( 1575 )   PDF (407KB) ( 844 )  
    Related Articles | Metrics
    The effect of gaseous condensate-water on condensate-gas system used to be ignored in conventional condensate-gas system phase behavior test. Condensate gas resewoir exploitation prac-lice in home&abroad indicated that the effect of gaseous condensate-water on condensate-gas system phase behavior should not be ignored. So to instruct the condensate gas reservoir exploitation more efficiently, we must set up the condensate-gas system PVT phase test and compute the method of the consider-ing gaseous condensate-water. In this paper, we tried to explore and design the condensate-gas system PVT phase test method with abundant condensate-water, compared with the convention-al oil/gas two-phase equilibrium system test results, and ana-lyzed how the gaseous water content affect the condensate-gas system.
    WELL TEST METHOD IN HEAVY OIL THERMAL RE-COVERY WITH CONSIDERATION OF GRAVITY OVERRIDE
    HUO jin; JIA Yong-u YU Jia et al.
    2006, 28(2):  52-55.  DOI: 10.3863/j.issn.1000-2634.2006.02.014
    Asbtract ( 1524 )   PDF (210KB) ( 670 )  
    Related Articles | Metrics
    Aimed at Gravity Override in a steam-injection processes,a well test analysis model of wedge-shaped compound reservoir is set up to simulate to slant steam front. 1'he mathematical mod-e1 considering heat loss is given and solved by Iaplace transfor-mation, then stehfest algorithm is used to obtain dismentionless wellbore pressure. The influence of the parameter on the dis-
    mentionless wellbore pressure is discussed, such as slant angle,heat loss, and mobility ratio.
    DEPLETION EXPLOITATION PERFORMANCE PRE-DICTION FOR THE SATURATION CONDITIONS GAS CONDENSATE RESERVOIR CONTROLLED BY SIN-GLE-WELL
    PENG Cai-Zhen SUN Lei TANG Yong et al.
    2006, 28(2):  56-60.  DOI: 10.3863/j.issn.1000-2634.2006.02.015
    Asbtract ( 1020 )   PDF (404KB) ( 635 )  
    Related Articles | Metrics
    According to the mole conservation on the water and the hy-components in reservoir, adopting the K-value theoryof pseudo-component division，integrating Darcy's law and the method of the pseudo-component phase equilibrium calculation，the two-dimension three-phase single-well compositional mathe-matical model was presented. The effects of gravity, capillary pressure and interfacial tension, the compressibility of water and
    rock, the heterogeneity and anisotropy of rock physical proper-ties，were considered. The difference equation for the mathemat-ical model was accomplished by using the way of implicit pres-sure and explicit saturation(IMPES).The nonlinear equation was linearized by adopting Newton iteration method. The answer of the difference equation group was solved by utilizing linear Taxation method and direct solving method. A set of FORTRA1 calculation program was written. The result of study was used for the simulation calculation of the saturated conditions condensate gas reservoir controlled by single-well. It put emphasis on eval-uatittg produced gas velocity affects development performance of stable production fixed number of years and produced degree for the saturation conditions gas condensate reservoir. It provided the foundation for development plan optimization of the saturation
    conditions gas condensate reservoir and gas well reasonable pro-duce system regulation.
    ANALYSIS OF THE RECOVERY DEGREE OF THE UP-WARDS BLOCK OF THE WESTREN BEIYIER LINE IN THE SAERTU OILFIELD
    QIAN Jie;ZHANG Guo-zheng YUAN Guan-juen et al.
    2006, 28(2):  61-63.  DOI: 10.3863/j.issn.1000-2634.2006.02.016
    Asbtract ( 1004 )   PDF (300KB) ( 706 )  
    Related Articles | Metrics
    After polymer-flooding the chief reservoir in the Western Beiyier Line in the central Saertu Oilfied, polymer-flooding will be done upwards into Saertu reservoir SII10-SIII10 witch is the second type oil layers where the polymer-flooding is first per-formed. For holding the accurate recovery degree prior to poly-mer-flooding concerns the result evaluation and application on
    polymer-flooding in the second type oil layers, on the basis of comparing the advantages and disadvantages by computing the static and performance datain 4 calculating methods，it was con-eluded that the static calculating method is more rational. We had taken the results calculated with static method as the recov-cry degree ahead of polymer-flooding.
    油气化学工程与化工
    STUDY OF ADSORPTION AND CHROMATOGRAPHIC SEPARATION OF FLOODING SYSTEM OF SHENGLI PETROLEUM SULFONATE
    WANG Hong-yan; YE Zhong-bin ZHANG Ji-chao et al .
    2006, 28(2):  64-66.  DOI: 10.3863/j.issn.1000-2634.2006.02.017
    Asbtract ( 1388 )   PDF (264KB) ( 744 )  
    Related Articles | Metrics

    The static and dynamic adsorption law and chromatographic separation character of flooding system of Shengli petroleum sul-fonate(SLPS) and assistant surfactant have been studied. Re-sups show that SLPS is linear adsorption at lower concentration,and maximum adsorption capacity is 4. 6 mg/L. The adsorption capacity has been reduced obviously when adding assistant sur-factant. There is chromatographic separation in some extant
    when inject SLPS and assistant surfactant together, the effect of chromatographic separation is more obvious when adding HPAM in flooding system. According to the experiments, the coopera-five effect will exhibit by increasing the surfactant concentration of the flooding liquid.

    SPECTOPI30TOMETRIC FLOW-INJECTION ANALY-SIS ON TRACE I-IN RESERVOIR WATER
    XIA0 Xin-feng;ZHANG Xin-shen;LUO Ya-jun;et al .
    2006, 28(2):  67-70.  DOI: 10.3863/j.issn.1000-2634.2006.02.018
    Asbtract ( 1617 )   PDF (351KB) ( 602 )  
    Related Articles | Metrics
    In the present method, a new , simple and rapid spectopho-
    tometric flow injection technique for the accuracy and determina-
    lion of I-in reservoir water has been developed. The method is
    based on the decrease of absorbance intensity of rhodamine B
    due to the complexation with[I2Br]-，I-can be selectively ox-
    idated to form I2 by Ce(Ⅳ)in acidic medium and Iz reacts with
    Br-to form[I2Br]-，At this moment, some changes of the so-
    lotion's color takes place. It is found useful for sensitivity in CT-
    MAB media. The absorption peak of the complexation, which is
    increased linearly By addition of I-，occurs at 585 nm. Optimi-
    zation of chemical and flow injection variables has been made.
    Under the optimized conditions，the calibration curve obtained is
    linear over the range 0. 0500~1. 00 mg/L, the linear equation
    is H(mV) =76.6c(mg/L)-2. 933 3，r=0. 999 6，the de-
    section limit is 0. 020 mg/L, and the precision(RSD=0. 85 %，
    n=11 )is found quite satisfactory. This method has good sensi-
    tivity and selectivity. Application of the method to the analysis
    on I-in reservoir water resulted a good agreement between the
    expected and found values.
    RELATION BETWEEN STRUCTURE OF ETHENE.VINYLACETATE COPOLYMERS AND THEIR POUR POINT DEPRESSION
    JIANG Qing-zhe YUE Guo SONG Zhao-zheng .
    2006, 28(2):  71-74.  DOI: 10.3863/j.issn.1000-2634.2006.02.019
    Asbtract ( 1002 )   PDF (341KB) ( 749 )  
    Related Articles | Metrics
    All kinds of molecule structures of the ethylene-vinyl ace-fate copolymers(EVA) have been synthesized by solution poly-merization. Their crystallinity, solubility and the effect of lower-ing pour point of crude have been studied. Results show that on-1y carbon atoms far from polar group of EVA take part in crystal-
    lizing. When carbon number of alkyl chain of EVA, which takes part in crystallizing, is about equal to tbree fourths of average carbon number of wax, the effect of EVA pour point depressants is best. When the average relative molecular mass of EVA is 1 .2 x 10"，the effect of EVA is best. The distribution of relative molecular mass has little influence.
    RESEARCH OF THE REACTIVE PERFORMANCE OF N-OCTANE ON DIFF'ERENT ZEOLITE CATALYSTS
    KE Ming CHEN Yan-guang HUANG Yong et al.
    2006, 28(2):  75-79.  DOI: 10.3863/j.issn.1000-2634.2006.02.020
    Asbtract ( 926 )   PDF (418KB) ( 576 )  
    Related Articles | Metrics
    The hydroisomerization and aromatization properties of a se-ries of different zeolite catalysts, primary Ni/HZSM-5，Ni/HFER, Ni/SAPO-11，Ni/Hpand Ni/HY were compared in a micro-reactor by using of n-octane as probing molecular. Re-sups show that Ni/HZSM-5 zeolite with the same pore structures
    have the approximate product distribution, with the increase of Si/Al ratio, the liquid product yield and hydroisomerization se-lectivity have been improved. The large pore zeolite have more superior isomeric product selectivity than medium pore and small pore zeolite, the isomeric and aromatic selectivity of Ni/HY cat-alyst are 41. 83% and 3. 4% respectively. However, the Ni/
    HZSM-5 catalyst with a higher Si/Al ratio has higher activity and excellent capability to retard the formation of coke, at the same time it has the optimum isomerization and aromatization performance.
    VISCOSITY REDUCTION Er'r'FCTS AND MICROANAL-YSES FOR VISCOUS WATER-IN-OIL CRUDE WITH CHEMICALS OF XINTAN IN SHENGLI OILFIELD
    Jing jia-qiang LI Ji YANG Li et al .
    2006, 28(2):  80-84.  DOI: 10.3863/j.issn.1000-2634.2006.02.021
    Asbtract ( 1074 )   PDF (668KB) ( 565 )  
    Related Articles | Metrics
    Viscous water-in-oi1 crude of Xintan in Shengli Oilfield has high viscosity , poor flowability , high consumption of energy when gathering and transportation at normal temperature. Some measures have to be taken to reduce its viscosity; otherwise its gathering and transportation are difficult. Therefore a kind of
    phase inversion and viscosity reduction agent VRKD18 for the crude has been developed on the basis of viscosity reduction effect and stability after some chemicals are added. VRKD18 is composed of two kinds of nonionic surfactant and can reduce apparent viscosity from 7 000-11 000 mPa·s to below 100
    mPa·s at 50`C and51s-1.The phase inversion process, mi-crostructure and granule diameter distribution of dispersed liquid droplets for the crude with VRKD18 agent have been analyzed by means of an image analysis method, and then their viscosity reduction mechanism has been discussed. Results show that the viscous oil can reverse its phase spontaneously. The reason of
    viscosity reduction is that VRKD18 has changed its outer and in-ner phase structures，the size and mode of the droplet interac-lion, which provides a basis for the renovation of their gathering and transportation technics.
    EFFECT OF VISCOELASTIC POLYMER ON RESIDUAL OIL.
    LIU Chun-ze CHENG]in-song XIA Hui-fen
    2006, 28(2):  85-88.  DOI: 10.3863/j.issn.1000-2634.2006.02.022
    Asbtract ( 945 )   PDF (282KB) ( 705 )  
    Related Articles | Metrics
    Based on the types of residual oil in pore media after water flooding and the viscoelasticity of polymer fluid in reservoir pore, undulating tube model which has the contraction-expansion cyclical process and upper-converted Maxwell model which is generally applied to numerical calculation of viscoelastir fluid areselected. The mathematics model made up of continuity equation,
    equation of motion, UCM constitutive equation, stream function,vorticity equation as well as the boundary conditions are established. By effective numerical calculation, the mechanism of improving oil displacement efficiency ofymer fluid through mechanical analysis and theories analysis is:(1)the rolling action on oil film by first normal stress and shear stress from viscoelas-
    tic polymer fluid is greater than the one by shear stress from Newtonian fluid with same viscosity, residual oil film can flow partly;(2)comparing polymer fluid with Newtonian fluid，the same stream line is not in the same position, and the swept vol-ume of viscoelastic polymer fluid is larger than Newtonian fluid
    with same viscosity.
    石油机械工程及其它
    STUDY ON THE EFFECT OF AIR-CHAMBER' S SITE UPON PULSED WATER-JET
    PU Jia-ning GAO Song-zhu CHEIV Ming.
    2006, 28(2):  89-91.  DOI: 10.3863/j.issn.1000-2634.2006.02.023
    Asbtract ( 684 )   PDF (290KB) ( 655 )  
    Related Articles | Metrics
    The paper structures the mathematic models for analyzing the phenomena of pulsed water-jet of a system embodied air-chamber was established with the method of the hydraulic transi-ent characteristic stream. The differential grid had three bounda-ries only, pulse source, air-chamber and nozzle, and none inte-rior node being needed. For the lengths of upstream and down-
    stream sections may be unequal, using the novel Variable Time Step Method is necessary. The sample computation was show that, in order to induce an acceptable hydraulic resonance to strengthen pulsed water-jet. The air-chamber should be posi-boned correctly according to the concrete condition of the given system.
    EXPERIMENTAL STUDY OF CORROSION OF STEEL IN SUPERCRITICAL FLUID CO2
    ZHANG Ying; LI Chun-fu; WANG Bin et al.
    2006, 28(2):  92-96.  DOI: 10.3863/j.issn.1000-2634.2006.02.024
    Asbtract ( 806 )   PDF (666KB) ( 532 )  
    Related Articles | Metrics
    With the static high pressure and high temperature kettle and the SEM method，and based on the analysis between the supercritical fluid CO2 and the interaction of the water and oil, the corrosion experimental study for the N80 steel grade in the supercritical fluid CO2 was investigated. The results were show that the C02 corrosion was found in the SCF-CO2 gas phase. In the liquid phase, the corrosion rate was accelerated with the increas-ing of pressure; it got the peak at 12 MPa and then down. In the medium of pure water, the corrosion rate in the gas was agreed with the corrosion rate in the liquid at 12 MPa, the tubercules were observed in corrosion film. The corrosion rate in the liquid was accelerated if the civde oil content was 30%.The tuber-
    rules and poles were found in the corrosion film together. The C02 corrosion of steel was restrained with the increasing of the oil content.
    ANALYZING THE LOAD-BALANCING POLICY BASED MULTI-LINK IN NETWORK
    YE Chen
    2006, 28(2):  97-100.  DOI: 10.3863/j.issn.1000-2634.2006.02.025
    Asbtract ( 609 )   PDF (517KB) ( 701 )  
    Related Articles | Metrics
    Using several network link in Internet access can insure the network connection with reliability and duration. This paper u-ses two policies of traffic loadbalancing based muftilink to an-alyze the theory and mechanism of them, and compare the strongpoint and weakpoint with the experimentation result in practice.