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01 December 1994, Volume 15 Issue 4 Previous Issue    Next Issue

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EVIDENCE FOR THE PRESENCE OF EARLY PALEOZOIC CONTINENTAL CRUST IN JUNGGAR BASIN Peng Xiling 1994, 15 (4):  289-297.  Abstract ( 124 )   PDF (839KB) ( 401 )   Save It is concluded that Junggar area is a continental ctust rather than an oceanic crust during Early Paleozoic. based on the following evidences: geochemical components of the most widely-distributed Upper Paleozoic volcaniclastic in Junggar basin formed in the volcanic island arc area of continental margin: the Ordovician in the northern Junggar area is Composed of continental shelf platform carbonate. and similar limestone decollement was discovered in the Silurian. indicating that the basement of ocean basin is a stable continental block ; composite rocks (1 900ma) were found in the eastern Junggar area; the basin is at the stage of continental basin evolution during the Late aleozoic to middle Cenozoic. References | Related Articles | Metrics

ON THE JURASSIC AND BASEmENT OF JUNGGAR BASIN AND ITS PERIPHERAL BASIN Zhang Chuangan 1994, 15 (4):  298-300.  Abstract ( 92 )   PDF (359KB) ( 194 )   Save The Jurassic in Junggar basin and its fifeen peripheral basins is a conbination of sequence with fair hydrocarbon potential: middle and Lower Jurassic are considered to be the source rock and resetvoir. and Upper Jurassic as the reservoir and regional caprock. According to the nature of basement. these basins can be divided into two categories; intermediate massif basin. with old craton of the Presinian period as basement, and intramontane basin. with new craton of the Hercynian period as basement. The fo:mer are nostly an inherited basin. with various oil-bearing sequences and betler oil potential; and the latter are mostly a residual basin. with complex hydtocarbon condition. Lower Catboniferous in Junggar basin is onmetamorphic paralic facies. and Devorian is also nonmetamotphic except in verv few aleas. As a results. this sequence should be considered as the caprock rather than as the basement. Related Articles | Metrics

mODEL FOR FORmATION RESERVOIR IN mAQIAO UPLIFT IN HINTERLAND OF JUNGGAR BASIN Fan Guanghua 1994, 15 (4):  301-308.  Abstract ( 81 )   PDF (728KB) ( 298 )   Save Abnormal pressure was discovered in Well Pencan 2 and Well Pen 4 in maqiao uplift of the hinterland of Junggar basin. with top sealing bed at a buriai of 4 485m under which an abnormally high presure zone exist. Oil and gas from the intetval (3 835~5 135m) of Well Pencan 2 are featured with vertical migration and mixed sources. New theory on petroleum geology“fluid kitchen”was successfully used to analyse the model for formatior of resetvoir. moreover. facies belt of hydrocarbon in different temperature-pressure zones was predicted. Related Articles | Metrics

A NEW EXPERT SYSTEm FOR PREDICTING OIL AND GAS FROm SEISmIC DATA Ran Qiquan, Li Shilun 1994, 15 (4):  309-315.  Abstract ( 67 )   PDF (509KB) ( 170 )   Save This paper briefly describes a new expert system for predicting oil and gas from seismic data. Based on artificial intelligence theory. this system is developed using nervous network techniques for the purpose of oil and gas prediction. which is composed of knowledge model. strueture. and learning rules of the expert system. oil and gas prediction. etc. Finally. case history study is made for the purpose of checking its application result. References | Related Articles | Metrics

APPLICATION OF SPECTRAL C/O LOG In KARAmAY OILFIELD Yang Hong 1994, 15 (4):  316-320.  Abstract ( 72 )   PDF (421KB) ( 173 )   Save An integrated analysis of spectral C/O log data as well as dynamic and static data resulted in the pronounced responses in oil and gas-bearing layer evaluation of exploration wells. petfotmance monitoting of observation wells. and watered-out zone evaluation of producing wells in Karamay oilfield. Related Articles | Metrics

CHARACTERISTICS OF ORGANIC mACERALS IN JURASSIC SOURCE ROCK IN THE HINTERLAND OF JUNGGAR BASIN Hui Rongyao, Ding Anna 1994, 15 (4):  321-327.  Abstract ( 67 )   PDF (557KB) ( 253 )   Save Using fluorescent microscope. assisted with reflecting and scanning electron microscope, an accurate evaluation of hydrocarbon source rock can be obtained. Organic macerals in Jurassic soutce rock in Well Pencan 2 and well Pen 4 of the hinterland of Junggar basin are dominated by algae amorphous mass (51%~96%). In Sangonghe Formation shale , Cainan oilfield. amorphous mass can reach as high as 93.88%. or microsome accounts for 83.95%. which oil formed at R.< <0. 73%. References | Related Articles | Metrics

THE APPLICATION OF BIOmARKERS IN THE GAS-SOURCE STUDY OF HIGH-OVER mATURE NATURAL GASES Li Yanjun, Yang Yuancong, Wang Tingdong, Wen Hengfan, Li Yongkang 1994, 15 (4):  328-334.  Abstract ( 71 )   PDF (560KB) ( 287 )   Save The application of biomarkers in the gas-souce study of high-over mature gases is introcuced by means of cast history study. It is asrertained that the natural gas in Fuyang oil layer in Wangjialun-Songzhan areas is mainly sourced from the deep Jurassic coal scams. which lnigrates vertically and accumulatcs in a nearest place in a wholc. Finally. it is suggestcd that gas-source of high -over miature gases using biomarkers is a practical method. Related Articles | Metrics

A PRELImINARY DISCUSSION OF JURASSIC NON-mARINE SEQUENCE STRATIGRA PHY, EASTERN JUNGGAR BASIN Pu Renhai, mei Zhichao, Tang Zhonghua 1994, 15 (4):  335-342.  Abstract ( 76 )   PDF (692KB) ( 397 )   Save In eastern Junggar basin. seven Jurassic alluvial depositional sequences bounded by eight unconformities have been delineated from the integrated interpretation of outcrop. drilling and seismic data. each of which is 1 00 ~ 300m thick. alluvial allocycle thinning upwards. and contains low system tracts of low stand and high stand. In low stand system tract. facies belts of alluvial fan. braided stream. shale-rich. low-sinuosity stream. and meander stream ate distributed in consecutivc order from the margin to center of the basin. In high stand one. coarse clastic sediments are missing at the margin of the existing basin. which is composed of meander stream or swamp facies throughout the basin. The surface of unconformity. deporsitional sequence. and system tract ate all contolled by repeated tectonic. uplift subsidence and still. References | Related Articles | Metrics

ESTABLISHmENT OF CARBONIFEROUS FUSULINID ZONE ON DUWA SECTION IN TARIm BASIN AND ITS GEOLOGIC SIGNIFICANCE Shen Yixin 1994, 15 (4):  343-347.  Abstract ( 85 )   PDF (399KB) ( 254 )   Save On the basis of systematic study of fusulinid fossil on Duwa section in the southwestern Tarim basin. four fusulinid zone of middle and Upper Catboniferous are established. i. e. Prufusulinella. Protriticites. Trutcutes and Eopara fusulina. The study provided the fossil basis for the formation subdivision and correlation in this area. References | Related Articles | Metrics

CLASSIFICATION, CORRELATION AND EV ALUATION OF WATER-DRIVE PERFORmANCE CURVE ANALYSIS mETHOD Chen Yuanqian 1994, 15 (4):  348-356.  Abstract ( 144 )   PDF (466KB) ( 362 )   Save This study provided the classification. correlaton and evaluaticn of more than 20 kinds of the water-drive performance curve analysis methods including natural water-drive and artificial water-drive. References | Related Articles | Metrics

mATHEmATICAL mODEL ANALYSIS OF mULTIPHASE FLOW THROUGH POROUS mEDIA Li Chuanliang 1994, 15 (4):  357-360.  Abstract ( 59 )   PDF (274KB) ( 232 )   Save By means of theoretical analysis. problems of existing multiphase flow through porous media model are pointed out. Furthetmore. two new models are established. which are more reasonable and simpler compared With old ones. References | Related Articles | Metrics

A mETHOD FOR TREATING OIL -WATER RELATIVE PERmEA BILITY CURVES Yu Qitai 1994, 15 (4):  361-365.  Abstract ( 87 )   PDF (363KB) ( 231 )   Save The present method for treating oil-water per meability curves is improved. The base of this method is to ncrmalized and to average relative permeability curves. By using relationship between the irreducible water saturation、 the residural oil saturation. the wwater relative permeability at residtlal oil saturation and the air permeability as w'ell as. the normalized average relative permeablity'. one (an obtain oil-water relative permeability at different ait permeability in which the shape of oil-phase relative permcability curves keeps constant and the shape of water-phase relative permeability curves varies with the air permeability. References | Related Articles | Metrics

DEVEIOPmENT LEVEL COmPARISON OF WANGCHANG OILFIELD AND STmILAR OILFIELDS OF U.S. A AND RUSSIA Wu Guanghong, Chen Baolai, Li Fawen, Zhao Qizhi 1994, 15 (4):  366-374.  Abstract ( 114 )   PDF (707KB) ( 292 )   Save This paper summarizes the development characteristics of Wangchang oilficld and similar ficlds in the U. S. A and Russia. compates and analyzes their levcl of development. and discusses the problems of timing for water flood and EOR. as wel as prcduction uinder enlarging pr essure differentials. It js suggested that the development level of Wangchang oilfield approaches or surpasses that of similar fields in the U.S. A and Russia; for unsaturated sandstone oilfields. it is inappropriate to be produced under excessively enlatging pressure differentials ;and secondary and teriary recovery processes should be started at the time when IeServoir pressure is s0 depleted that peak production and steady production can not be maintained. References | Related Articles | Metrics

EFFECT OF GUAR GUm FRACTURING FLUID ON FORmATION CRUDE Huang Qiuwei, Zhu Xuehua 1994, 15 (4):  375-377.  Abstract ( 65 )   PDF (279KB) ( 149 )   Save After guar gum fluid fracturing in several wells produced from Wuerhe Formation reservoir in southern District No. 5 of Karamay oilfield. the significant difference in physical preperties of crude oil ensued. which was embodied as follows : noninflammable on ignition. brown colloid at ambient temperature. and difficulty in conventional analysis. These problems arise from guar gum fracturing fluid. Viewing that it is recommended that sesbania fluid is preferentially used rather than guar gum fluid on fracturing treatment under present conditions. Related Articles | Metrics

APPLICATION OF LOGISTIC mODEL IN VISCOUS OIL STEAmDRIVE PROCESS Liu Bin 1994, 15 (4):  378-381.  Abstract ( 63 )   PDF (324KB) ( 211 )   Save On the basis of applied mathematics. logistic cyclic model “as introduced into steamdrive performance analysis using practical data of vIscous oil reservoir steamdrive. The model for per formance analysis. coincident with viscous oil steamdrive characteristics. is developed by means of m2 thematical statistic analysis. which can be used represent relationshjp between oil production rate and steam ingection rate. and deter mine steam inection rate. oil production rate. and OSR on a optimal basis. in a viscous oil teservoir. References | Related Articles | Metrics

HIGHSAND CONCENTRATION FRACTURING TECHNIQUE AND ITS DEVELOPmENT Wang Zhuofei 1994, 15 (4):  382-384.  Abstract ( 88 )   PDF (279KB) ( 249 )   Save High sand concentraition fractiring IS a treatment technique that the proppant concentrat1on is larger than usual fractrring. Thistyqe of fractring has the characteristics of shorter fracture and lower eost compared with usual fracluting in the same ftactrore: conductivity. so it is nainly. adapted for water flooding and middle -high permeability restivoir. References | Related Articles | Metrics