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01 June 1990, Volume 11 Issue 2 Previous Issue    Next Issue

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CHARACTERISTICS AND MECHANISM OF FORMATION OF STRUCTURES IN TOUSITAI AREA, SOUTH MARGIN, JUGGAR BASIN Kuang Jun, Zhu Xinting 1990, 11 (2):  95-102.  Abstract ( 140 )   PDF (591KB) ( 292 )   Save According to general seism ic survey, high-accurity detail gravity survey and detailed materials of surface geology, this paper probed into the characteristics and mechanism of formation of structures in deep and shallow stratigraphies in Tousitai area，in which， in deep stratigraphies Palaeozoic metamorphic bases were the combinations of structures of transpression horsts and grabens from which we supposed a zone of high horsts, a zone of low grabens and two slope zones, in shallow stratigraphies the Mesozoic and Cenozoic structures were slip-fold ones formed by gravity action and showed the combinations of grjvity-deiachment structures. Though Tousitan area stood the development of multicyclic structures , the structures , the-re were mainly formed during Himalayan orogeny. References | Related Articles | Metrics

SEDIMENTARY FEATURES AND DIAGENESIS OF DAMOGUAIHE FORMATION, UPPER JURASSIC,BEI ER DEPRESSION Zhang Jinliang Shen Feng 1990, 11 (2):  103-116.  Abstract ( 87 )   PDF (1076KB) ( 146 )   Save Damoguaihe Formation of Bei'er Depression, an Upper Jurassic lacustrine sequence up to 2000 m thick, mainly consisting of subaqueous fan and offshore to shoreline deposits. The lower sequence of Damoguai he Formation typically consists of debrisdominated subaqueous fan deposits which can be divided into three subfacies and then seven microfacies. Middle sequence formed during episode of high lake level, with offshore bars along the subdued margins of deeper water. The Upper sequence of Damoguai he Formation results from the contraction of the lake system, and mainly coinsisted of beach and bar deposits. Analysis of Damoguai he sandstones shows that the volcahiclastic lithic sandstones were derived from magmatic arcf. Porosity reduction with depth of burial was controlled largely by co^npaction during diagenesis. Early diagenetic processes increased porosity in the shallow volcaniclastic sandstones, Which took place earlier then the hydrocarbon generation in space. Based on diagenetic events related to temperature, Damoguai he Formation can be divided into shallow, intermediate, and deep diagenetic zones. References | Related Articles | Metrics

CHARACTERISTICS OF HEAVY MINERAL COMBINATION AND FORMATION CORRELATION OF THE UPPER TERTIARY IN THE TARIM BASIN Li Yude 1990, 11 (2):  117-121.  Abstract ( 87 )   PDF (408KB) ( 197 )   Save In the Upper Tertiary of the Western, Northern and Eastern pr.rts of the Tarim Basin, heavy minerals exhibit epidote-hornblende combination with dominating irregular and few roundshaped grains in the Xiy u Formation, hornblende-epidote combination in the Upper Atushi Formation and Garnet-epidote combination in the lower Atushi Formation without round grains, garnet - zircon combination in the Jidike and Talake Formation, Comparison of the heavy mineral data shows that “the wide grey green strip” of the top of the Miocene Jidike Formation in the Northern Tarim is not correlated to that (which is Pliocene) appeared in the Eastern Tarim. Therefore, strip nature of heavy minerals suggested by Pettijohn is applicable in practice. Related Articles | Metrics

DIVISION AND CORRELATION OF THE MARINE CARBONIFEROUS AND LOWER PERMIAN STRATA IN TARIM BASIN Zhao Zhixin 1990, 11 (2):  122-131.  Abstract ( 134 )   PDF (674KB) ( 291 )   Save This paper generalizes the lithological and biostrati graphical characteristics of the marine Carboniferous and Lower Permian in Tarim Basin and its adjacent areas, southern Xinjiang. The division and correlation among the different stratigraphical regions in these areas，concerning Tianshan, Kunlunshan and Aerhchin Mountains are mainly based on conodonts and fusulinids studies.The Carboniferous—Permian boundary in these areas is drawn at the base of Sweetognathus whitei —N eostreptognathodus pequopensis—Loncfyodina festiva assemblage . References | Related Articles | Metrics

THE MESOZOIC STRATUM OF THE WELL LUNNAN- 1 IN TARIM BASIN Yong Tianshou, Song Lixiong, Yu Yuede, Yu Xinqi 1990, 11 (2):  132-135.  Abstract ( 93 )   PDF (282KB) ( 143 )   Save In this paper, the stratum and fossil assemblages of the well Lunnan—1 in Tarim Basin, Xinjiang, are systematically described . The Mesozoic stratum in this well has been divided in descending order as following： The Kapushaliang Group (K1kp)， the Qigu Fm, (J3q)， the Qiakemake Fm.(J2q2) ， the Kezilenur Fm. (J2k)， the Yang xia Fm. (J1y) and Arhe Fm. (J1a). Based on the correlation of lithological and mineral features between this well and the Kuche depression and plant fossils, the depth from 4825m to 5039m in this well us identified as the Lower Jurassic Arhe Fm., and also a brief discussion on the age of the fossil sporo- pollen assemblages found from this well depth is given. Related Articles | Metrics

CHARACTERISTICS OF TRIASSIC GAS RESERVOIRS AND CAP ROCKS IN THE WURHE-XIAZIJIE AREA Zhao Guangmin, Wu Xiangli 1990, 11 (2):  136-139.  Abstract ( 91 )   PDF (312KB) ( 192 )   Save Based on the latest data of cores and their physical properties , an integrated discussion on the lithological characteristics and corresponding evaluation of the gas reservoirs and cap rocks in the referred area was presented with the aim of providing a beneficial insight to exploration of large and middle scale gas fields in the Northwestern Margin of Junggar Basin. References | Related Articles | Metrics

ONE POINT METHOD FOR DETERMINING FLOW EFFICIENCY OF GAS WELL Chen Yuanqian 1990, 11 (2):  140-148.  Abstract ( 215 )   PDF (482KB) ( 233 )   Save Flow efficiency (FE) is defined as the ratio of the actual product! vity index of a well to the ideal productivity index for no skin factor (S = 0). Therefore, it is a very important index for judging completion wel1 efficiency of gas and oil wells. However, determination of FE requires the data from build-up curvetesting before .The relationship formula of FE of gas well is derived in this paper, using deliverability equation. At the same time, one point method for determining FH of gas well from the combination of two IPR equations is presented in this paper. Under given reservoir pressure, application of this method oniy requires production rate and flowing bottom-hole Pressure of gas well in a work system. References | Related Articles | Metrics

GEOLOGICAL STATISTICS AND ITS APPLICATION IN DEVELOPMENT OF OIL AND GAS FIELDS Zhang Shuqiu, Deng Xunkang 1990, 11 (2):  149-156.  Abstract ( 81 )   PDF (453KB) ( 239 )   Save The paper presents an introduction to geological statistics, an independent new branch of mathematical geology, and its principle, methods and calculation proceldures. Examples are given to illustrate its practical applications in development of oil and gas fields. Related Articles | Metrics

NUMERICAL SIMULATION STUDY OF THE IX6 PILOT THERM-RECOVERY PROJECT IN KARAMAY OILFIELDS Chang Yuwen 1990, 11 (2):  157-162.  Abstract ( 73 )   PDF (415KB) ( 181 )   Save Based on the results of therm- recovery numerical simulation, this paper presents analyses of geological , steam injection and completion parameters affecting steam injection development of the IXs pilot project in Karamay oilfields.The results illustrate that major geological parameters affecting the efficiency of steam injection development are effective thickness of the pay and crude viscosity. Effect of the absolute permeability manifests mainly in the early period with a little effect on the ultimate recovery. Highly permeable zone and permeability anisotropy existing in the pay zone display certain effects on the steam injection recovery. After steam breakthrough in producing wells, decreasing steam speed into injection wells improves efficiency of the recovery. Related Articles | Metrics

THE APPLICATION OF MACROCOMPUTER TECHNIQUE IN CARBONATE CONTENT DETERMINATION & ANALYSIS INSTRUMENT Liu Zhongzhan, Yu Jian 1990, 11 (2):  163-165.  Abstract ( 95 )   PDF (251KB) ( 219 )   Save This article discusses the physical and chemical principles to quickly determine the carbonate content together with the morden computer software and hardware techniques, introduces the structure, principle and operation of the Macrbcomputer Carbonate Content Determination and Analysis Instrument. This instrument has got rid of many shortcomings that exist in the traditional mechanical pressure transducing carbonate content determination instruments such as low precision, narrow scope and limited uses from environmental conditions etc.. Related Articles | Metrics