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01 June 1996, Volume 17 Issue 2 Previous Issue    Next Issue

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STRUCTURING MECHANISM IN WESTERN TARIM BASIN AND ITS ADJACENT AREAS Wu Zhizhong 1996, 17 (2):  97-104+201.  Abstract ( 101 )   PDF (644KB) ( 234 )   Save Structuring mechanism in western Tarim basin and its adjacent areas was primarily controlled by colision and extrusion of Indonian plate, and, to a less extent, by extrusion of Siberia and Kazakhstan plates: overthrust of Pamir nappe and shear strike slip to the east in southwest margin; overthrust of west Kunlun mountains in south mar-gin; overthrust of Kalpin arc overthrust uplift in northern and northwestern Tarim basin;and in the northeast, special shear strikes slip system arised from Bachu faulted uplift sub-jected to the collision in opposite directions. References | Related Articles | Metrics

APPLICATION OF MODEL FOR TRANSITION ZONES IN OVERLAP REVERSE FAULTS IN BURIED HILL OF MAJOR HORSTS IN CENTRAL TARIM BASIN Yang Songling, Zhang Zhensheng 1996, 17 (2):  105-110+201.  Abstract ( 79 )   PDF (578KB) ( 256 )   Save Evolution mechanism of transition zones of accordant overlap reverse fault and reversed overlap reverse fault cortrilling the formation of buried hill in Tazhong low uplift zone of Tarim basin was examined on the irasis of structural model of overlap reverse faults. It is suggested that the former is a slope and the latter a platform. Multi-period movements and overlaps of two major faulis resulted in the associated minor faults and braided fractures in transition zones, which are benefical to hydrocarbon migration and aC-cumulation. Moreover, oil and gas pool can form when the trap is met. References | Related Articles | Metrics

PRIMARY STUDY ON RESERVOIR PATTERN AND ITS FORMING CONDITION IN SOUTHWEST DEPRESSION OF TARIM BASIN Dong Dazhong, Guan Chunlin 1996, 17 (2):  111-115+201-202.  Abstract ( 86 )   PDF (545KB) ( 170 )   Save Southwest depression in Tarim basin is a complex foreland type as a result of long term evolution. Each movement after Permian,especially Himalayan movement in Cenozoic caused Tianshan and Kunlun mountains successively elevate and overthrust to-ward the basin, thereby resulting in large scale thrust faults and fault-related folds in fore-land depression. Various traps related with the uplift, fold and thrust fault may form dif-ferent reservoir types if there was enough oil and gas supply. Paleozoic traps occur in small amounts in which anticline, fault, lithologic and stratigraphic unconformity reser-voirs are dominant. Meso Cenozoic traps occur in large amounts in which compaction anti-cline, fault-anticline, fault and lithologic reservoirs are dominant. The key to the forma-tion of Paleozoic and Meso-Cenozoic reservoirs is that the source rock is directly or indi-rectly communicated with the reservoir through the fault. Otherwise, it is difficult to dis-cover oil and gas even in the best-quality traps. References | Related Articles | Metrics

REGIONAL SEISMIC STRATIGRAPHY IN SOUTH-WEST DEPRESSION OF TARIM BASIN Zhao Zhichao, Tang Yong 1996, 17 (2):  116-122+202.  Abstract ( 79 )   PDF (556KB) ( 169 )   Save On the basis of analysis of seismic data, this paper divided the seismic fa-ciec by using“multi-parameter method" of seismic reflection, and represented seismic fa-cies types of each sequence with superiority seismic facies, then converted single well fa-cies section and outcrop section into time domain section to correlate seismic facies in seis-mic profile and establish the relation between seismic and sedimentary facies, and hence converted seismic facies into sedimentary facies ;regional lithology can be forecasted by es-tablishing lithology velocity crossplot based on the data of interval velocity and remaining interval velocity. References | Related Articles | Metrics

LOG INTERPRETATION OF LOW RESIS-TIVITY RESERVOIR PARAMETERS Fan Zhengjun, Jin Yizhi, He Duohua 1996, 17 (2):  123-126+202.  Abstract ( 103 )   PDF (348KB) ( 224 )   Save Based on logging characteristics of low resistivity oil and gas reservoirs,porosity, saturation and permeability etc. were calculated by adpoting conventional log in-terpretation and neural network methods. Case study showed good agreement. Meanwhile division of the reservoir and calibration of logs were discussed. Its accuracy can satisfy the demands for the estimation of oil and gas reserves. References | Related Articles | Metrics

FLUORESCENCE CHAR-ACTERISTICS AND HYDROCARBON-FORMING SIGNIFICANCE OF VITRINITE INJURASSIC COAL, TURPAN-HAMI BASIN Xiao Xianming, Liu Dehan, Sheng Guoying, Sun Yongge 1996, 17 (2):  127-129+202-203.  Abstract ( 86 )   PDF (367KB) ( 242 )   Save Fluorescence characteristics of vitrinite in typical Jurassic coal sample in Turpan-Hami basin and its peripheral basin have been quantitatively analyzed and tested by appiying the technique of laser fluorescence microprobe. Results showed that rich hy-drogen exists in vitrinite of Jurassic coal in Turpan-Hami basin, with the hydrogen index up to 180~ 200 mg/(g·TOC), and heavy hydrocarbon content from vitrinite up to 20% ~ 40%, indicating that such source rock has had hydrocarbon-generated potential. References | Related Articles | Metrics

THE RELATION BETWEEN ENVIRONMENTAL FEATURES OF BIOMARKER AND OIL SOURCE Wang Yutao 1996, 17 (2):  130-137+203.  Abstract ( 69 )   PDF (620KB) ( 212 )   Save This paper analysed and discussed the association characteristics of the biomarker in Upper and Mid-Lower Jurassic source rocks in Junggar basin. It demonstrat-ed that two sets of source rock are regionally different sedimentary systems, but possess similar sedimentary characteristics and provenance in some areas or beds, so the associa-tion of biomarker is also similar. It is concluded that environment controlled the compo-nents of biomarker in sediments. References | Related Articles | Metrics

GEOLOGIC AGE OF ARPISHM EBULAQ FORMA-TION IN EASTERN PART OF SOUTH TIANSHAN MOUNTA INS, XINJIANG Liao Weihua, Xia Fengsheng 1996, 17 (2):  138-144+203.  Abstract ( 63 )   PDF (539KB) ( 251 )   Save Through the twice field observation of standard section and lab identifica-tion of varieties of fossils, especially the discovery of standard condont fossil of Early De-vonian, it is confirmed that the geologic age of Arpishmebulaq Formation is delta zone and pesavis zone in late Lochkovian stage. References | Related Articles | Metrics

APPLICATION OF GAS LOG-GING INTERPRETATION IN JUNGGAR BASIN Zbang Guoxi, Xu Maolin, Wei Yangan, Liu Hao 1996, 17 (2):  145-149+203-204.  Abstract ( 87 )   PDF (514KB) ( 240 )   Save Based on analysis of sevenc commonly used gas logging evaluation methods at home and abroad, this paper pointed out that three gas logging interpreta tion methods (gas logging evaluation ,light hydrocarbon ratio and dual logarithm ratio methods) were comparatively applicable in Junggar basin, and obtained the results matching well with the fact. When choosing gas logging interpretation method, reservoir fluid characteristics and drilling conditions must be considered , and essential correction on zonal or interval values should be made with the data while drilling. Meanwhile, gas logging interpretation should rely upon the mutual compensation of precision of each method in order to improve the precision of interpretation. References | Related Articles | Metrics

DERIVATION OF LOGISTIC MODEL AND ITS SELF-REGR ESSION METHOD Chen Y uanqian, Hu Jianguo, Zhang Dongjie 1996, 17 (2):  150-155+204.  Abstract ( 232 )   PDF (442KB) ( 299 )   Save Based on the differentiating equation of growth type in Ref. 1, this article simply derived the factual Logistic mnodel. The methods for estimating production rate by fields, cumulative production rate, recoverable reserves. peak annual production rate and its year of occurrence were obtained. This model is simply applicable during tne period af-ter 50% recoverable reserves were produced. Furthermore, this article presented a self-re-gression method for solving the.Logistic model. References | Related Articles | Metrics

MECHANISM OF ENHANCING OIL RECOVERY FACTOR IN CON-GLOMERATE RESERVOIR BY USING PERIODIC WATER INJECTION METHOD Yang Xuewen 1996, 17 (2):  156-162+204.  Abstract ( 73 )   PDF (509KB) ( 293 )   Save For a severe conglomerate reservoir heterogeneity, cyclic water injection process may su bstantially enhance oil recovery. Cyclic pulse injection may cause the tran-sient pressure regime in the reservoir and remaining pressure in a thin aquifer. Under the capillary force. oil saturation in the thin layer and water -out reservoir can increase. Be-cause of the unscattered distribution of high- permeability main productive beds in the con-glomerate reservoir. it is suggested that the existing areal waterflood patterns be convert-ed to patterns in rows along the main per meability trend. and intermittent water flooding process in which rows of injectors work alternatively be implemented to further improve sweep efficiency and oil recovery. References | Related Articles | Metrics

OPTIMIZING EM PIRICAL FORMULA FOR CALCULATING DEVIA-TION FACTOR Yuan Zixue 1996, 17 (2):  163-167+204.  Abstract ( 174 )   PDF (291KB) ( 333 )   Save Comparing the results with 6 common empirical formulae for calculating deviation factor, this paper acquires the method with minimum error. When 1. 05≤Tr≤3.0, 0. 2≤Pr≤20. Dranchuk and Abu-Kassem methods are applicable for all the cases ex-cept that Beggs and Brill methods are applicable only within the subdomain 1. 05~1.1 of Tr and 1.5~4.4 of Pr. References | Related Articles | Metrics

GEOLOGICAL EVIDENCE FOR ADJUSTED DEVELOPMENT PLANS IN FAULT-BLOCK RESER VOIR: DETER-MINATION OF FAULT OCCURRENCE Xie Fen, Wang Qingxiang, Xie Keping, Xiao Chunlin 1996, 17 (2):  168-172+205.  Abstract ( 90 )   PDF (410KB) ( 189 )   Save This paper redetermined the occurrence of Baijiantannan fault in east Dis-trict No. 7 based on the data of core. well testing. testing and production test, and exactly defined the boundary of east District No. 7 and 530 well area in District No. 8. providing a geological evidence for adjusted development plans in fault- block reservoirs. References | Related Articles | Metrics

EMPIRICAL STATISTIC M ETHOD OF OIL-W ATER INTERFACIAL TENSION Bi Haibin, Wang Yinghui, Lu Guoming 1996, 17 (2):  173-176+205.  Abstract ( 155 )   PDF (336KB) ( 1014 )   Save References | Related Articles | Metrics

EFFECT OF CHANGE In SHALY CONTENT ON THE PERME-ABILITY OF CONGLOMERATE RESERVOIR-An Example from Lower K aramay For-mation in Middle District No.2,Karamay Oilfield Guan Weidong 1996, 17 (2):  177-179+205.  Abstract ( 106 )   PDF (234KB) ( 323 )   Save Detailed investigation of the grain size analysis data in tertiary pilot area, middle District No. 2, Karamay oilfield got the idea that the result from flushing precipita-tion became apparently distorted. especially the shaly content, while the data from sieve .analysis accord well with the actual conditions of the reservoir. Because of low shaly con-tent in conglomerate reservoir, it doesn't obviously affect the reservoir permeability. References | Related Articles | Metrics

NEW IDEA ON FRACTURE CHAR ACTERISTICS OF RESERVOIR In HUOSHAOSHAN OILFIELD Wang Guoxian, Zhai Lanxin 1996, 17 (2):  180-183+205-206.  Abstract ( 86 )   PDF (423KB) ( 354 )   Save On the basis of the shape of capillary pressure and relative per mea bility curve. and related parameters. the fracture characteristics of reservoir in Huoshaoshan oil-field were discussed. It is concluded that capillary pressure curve with low porosity, low permea ability, high displacement pressure, high mercury injection saturation and large platform segment resulted from open mini fracture after pressurization, while this kind of open fracture with high transmissibility mostly formed after the perforation of reservoir.Therefore, we presented a new idea: reservoir in Huoshaoshan oilfield exists as a critical body of rock mechanics, i. e. fracturing occurs once stress disturbance is imposed. References | Related Articles | Metrics

DETERMINING RECOVERY FACTOR IN VISCOUS OIL RESERVOIR BY APPLYING MUTILVARIATE REGR ESSION METHOD Liu Yufen, Chen Yuanqian, Bi Haibin 1996, 17 (2):  184-187+206.  Abstract ( 82 )   PDF (338KB) ( 225 )   Save ：The basic data from 39 steamflooded blocks in China were analysed to have established formula for determining oil recovery factor of the viscous oil reservoir with steam stimulation by analysing the individual control on oil recovery and applying multi-variate regression method. References | Related Articles | Metrics

REMIGRATION OF OIL AND GAS DURING THE FORMING OF OIL AND GAS RESERVOIR An Zuoxiang 1996, 17 (2):  188-193+206.  Abstract ( 101 )   PDF (548KB) ( 324 )   Save When regional tectonic framework changed as a result of tectonic move-ment or tectonic topography varied due to faulting, the original reservoir was destroyed and oil(gas ) remigrated along regional unconformity or fault towards the low-potential-en-ergy direction, and accumulated to form the reservoir in suitable trap. Because of poly-cyclic evolution of petroliferous basins in China, it is very clear that oil and gas remigrated and reaccumulated. Attention to this phenomenon is of theoretical and practical impor-tance, which should be combined with the analysis of thermal evolution history of source rock, and tectonic and sedimentary history to determine the distribution of source rock ,source-reservoir-cap assemblage type, and reconstruct the tectonic framework and topog-raphy in each period, thereby determining the direction of remigration and of reaccumula-tion, guiding oil and gas exploration. References | Related Articles | Metrics

DERIVATION OF LOGISTIC MODEL AND ITS SELF-REGRESSION METHOD Chen Yuanqian, Hu Jianguo, Zhang Dongjie 1996, 17 (2):  194-200.  Abstract ( 114 )   PDF (311KB) ( 263 )   Save Based on the differentiating equation of growth type in Ref.1, this article simply derived the factural Logistic model. The methods for estimating production rate by fields , cumulative production rate, recoverable reserves, peak annual production rate and its year of occurrence were obtained. This model is simply applicable during the decline period after 50% recoverable reserves were produced. Fur-thermore, this article presented a self-regression method for solving the Logistic model. References | Related Articles | Metrics