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01 September 1992, Volume 13 Issue 3 Previous Issue    Next Issue

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FORMATION AND EVOLUTION OF JUNGGAR BASIN Zhao Bai 1992, 13 (3):  191-196.  Abstract ( 945 )   PDF (574KB) ( 384 )   Save The embryo of graben-horst-like tectonic framework of Junggar Basin was originaly formed by an uplift of upper mantle during the time of the early-middle Carboniferous followed by a tension fault of the transitional basement for Devonian and Carboniferous systems. Its Permian, the stage of preliminary development of the basin, was down-faulted developing period. A period of fault/seg and depression occurred in Mesozoic with a continuous subsidence. Finally, after contractive uplift in Miocene ,Present Junggar Basin was formed in the end. References | Related Articles | Metrics

STRUCTURE ANALYSIS AND PETROLEUM EXPLORATION PROSPECT OF TOSTAI AREA IN JUNGGAR BASIN Xu Chunming, He Xiaosu, Wu Xiaozhi, Yao XinYu 1992, 13 (3):  197-205.  Abstract ( 125 )   PDF (734KB) ( 334 )   Save Based on the comprehensive study of the available outcrop and geophysical data of Tostai area, it is concluded that; 1)Tostai ,a basement platform on the top of the front monocline of the Tianshan mountains, was formed by the northwestward dextral strike slip movement of the western North Tianshan Morntain in Himaiayan period; 2)There are three rows of anticlines on the basdment platform: The southern row of anticiines wcre deformed by several structural movements and accompanted by south- dipping Mesozoic normal faults; the middie and the northern rows were formed during Himalayan movement and are thin-skinned structures resulted from north-dipping back thrust faulting ,3)The oil and gas seepage in Tostai was migrated from Sikeshu depression in the north in late Himalayan period;4 )The frontal structures are the most prospective exploration targets. The anticlinal , the fault-blocked and baserock reservoirs may be penetrated by one vertical well. References | Related Articles | Metrics

SEDIMENTATION MODEL FOR THE TRIASSIC AND JURASSIC STRATA OF THE NORTHWESTERN MARGIN IN JUNGGAR BASIN Zhang Jiqing, Jiang Xinsheng, Liu Zhigang, Zhao Yuguang, Wang Longzhang, Luo Jianling, Liu Zhenyu 1992, 13 (3):  206-216.  Abstract ( 134 )   PDF (842KB) ( 307 )   Save Based on the data from 584 wild cats anđ the reconnaissance/survey results about recent sediments of the north-western margin in Junggar Basin, the sedimentary characteristics of its Triassic and Jurassic strata have been studied, on which appropriate sedimentation models layer by layer have been developed as follows: Baikouquan formation of Lower Triassic(T1) could be a sequence of arid iand/semiarid land—braided river—meander river—lake basin delta—lacustrine deposit; Karamay formation of Middle Triassic(T2) could be a sequence of cliff fan of displacement—fan delta or braided delta—lacustrine deposit; Baijiantan formation of Upper Triassic (T3) could be a sequence of fan delta—lake and lake—bottom fan deposit; while Badaowan formation of lower Jurassic (J1) could be a sequence of humid fan—rudaceous/tophaceous braided stream—flood plain of the stream deposit. References | Related Articles | Metrics

ON THE DEPOSITIONAL F.NVIRONMENT AND CORRELATION OF PINGDIQUAN FORMATION (P2) OF ZHANGPENGGOU AREA IN THE EASTERN PART OF JUNGGAR BASIN Zhang Yijie, Qi Xuefeng, Cheng Xiansheng 1992, 13 (3):  217-226.  Abstract ( 103 )   PDF (830KB) ( 253 )   Save Based on the fossil assemblages lithologic characters, special minerals and microelements etc. , the depositional environment in the period of Pingdiquan formation was recognized to be a continental shore paralic lake, and expioring fan delta sandy—conglomeratic bodies to be good in petrophysics in the vicinity of strata that showed higher paleao—salineness and enormously enriched special fauna will be an important direction for prospecting hydrocarbon from east part of Junggar Basin. This paper also gives correlations for Pingdiquan formation, Lucaogou—hongyanchi formations in the southern margin and Lower Wuerhe formation in northwestern margin . Related Articles | Metrics

PRE—PALEOZOIC To PALEOZOIC SEDIMENTARY—STRATIGRAPHIC SEQUENCE IN ALTUN MOUNTAIN Zou Yisheng, Zhao Zhixin 1992, 13 (3):  228-239.  Abstract ( 95 )   PDF (906KB) ( 376 )   Save Based on the field Ieconnaissance results and a great quantity of laboratery analysis data, the author presentssome new views about the Pre—Paleozoic to Paleozoic sedimentary—stratigraphic sequence of Altun Mountain as fol-lows: lt was the Archaeozoic and Middle—Upper Proterozoic that consisted of the crystalline basement of Altun's fault—uplift zone. lts Paleozoic (cap Iock) was in a scattered distribution. Lower Ordovician stratum was overlapped unconformably on the Qingbaikou and Jixian systems, which resulted in an absence of the Cambrian, Upper Ordovician, Silurian and Lowet Carboniferous stratum occutred unconformably on the different strata of the Middle—Upper Proterozoic. The top and bottom of the Middle Carboniferous were absent in some area, while the Upper C?rboniferous anđ Lower Permian were in a continuous sedimentation. Related Articles | Metrics

BIOMARKERS FROM PINDIQUAN(P2)SHALE BY THERMAL MODELLING EXPERIMENS Wang Yutao 1992, 13 (3):  240-250.  Abstract ( 100 )   PDF (756KB) ( 288 )   Save Thermal modeling expertation have been mode for Pindiquan (P2) shale of Well Huo—11 in Huoshaoshen area, the eastern part of Junggar Basin. The thermal alteration characteristics of the bloearkers show that each of the compounds is changed regularly with the almulated temperatures, and that steranes have an anomalous lag obviously which is similar to the oil alteration from the well, indicating a partieular geological background and oil—forming environment. References | Related Articles | Metrics

DERIVATION AND APPLICATION OF A NEW TYPE EQUATION OF DECLINE CURVE Chen Yuanqian, Hu Jianguo 1992, 13 (3):  251-256.  Abstract ( 137 )   PDF (352KB) ( 298 )   Save A new type cquation of decline curve is derived in this paper, based on the application of Arps's hyperbolic decline. Also, the modified Kopatov' s empirical formula, which has been widely used in at home, is derived and suggest that it is a specific case of Arps's hyperbolic decline when the decline exponent n is 1/2. The new type equationis a straight line equation and its solution can be easily given without using the trial and error method and curve shifting method. References | Related Articles | Metrics

CALCULATION OF STEAM GROWTH VOLUME IN—SITU AND CUMULATIVE INJECTION / PRODUCTION RATIO IN STEA MDRIVE PROCESS Ni Ruoshi 1992, 13 (3):  257-263.  Abstract ( 114 )   PDF (470KB) ( 175 )   Save On the basis of the mathematical models of steam growth volume in—situ presented by P. J. Closmann and temperature distribution by Carslaw and Jaegar, this paper presents the methods for calculating the steam volume and the volume of pore volume in—situ at constant injection rate. lt suggests that existance of a gas state water may not be ignored during steamflooding, and a new equation for calculating cumulative injection/production ratio has been derived. Using actural data available, the values calculated is very close to field cases. References | Related Articles | Metrics

A CALCULATION METHOD OF FLUID PHASE EQUILIBRIUM OF KEKEYA CONDENSATE POOL Du Junshe 1992, 13 (3):  263-269.  Abstract ( 76 )   PDF (420KB) ( 191 )   Save The phase equilibrium calculation of Kekeya condensate pool has been made using a hybrid method of the equation of state. That is accelerated iteration and interpolation in place of iteration step by step, of which a similar matrix has been adopted rather than a reverse one of Jacobi' s matrix that could hardly allow for giving solution with gradient method. The result shows that this method has advantages of fastly calculating speed and fairly good stabilities. References | Related Articles | Metrics

CHARACTERISTICS OF SHASI MEMBER RESERVOIR (TERTIARY) OF YONGANZHEN OILFIELD Zhang Chunsheng, Lai Zhiyun 1992, 13 (3):  270-279.  Abstract ( 91 )   PDF (1122KB) ( 245 )   Save The diagenesis, reservoir characteristics and príncipal factors effecting the reservoir properties have been studied for Shasj member of Tertiary in Yonganzhen Oilfield, based on the data of seismic, well logging and deposition, etc., from which the classification and prediction of prospective areas for exploration has been made. It is concluded that Class Ⅰ reservoir was mainly distributed at the mid—fan channels; Class Ⅱ at the front and within channels as well as the fan margin ,Class Ⅲ at the fan bottom. The contemporaneous fault was one of the most important factors effecting the reservoir properties. Related Articles | Metrics

FAULTING STRESS ANALYSIS AND ITS EFFECT ON THE STUDY OF FRACTURED RESERVOIRS Hu Ming, Qin Qirong, Chen Jiming, Chen Rong 1992, 13 (3):  280-284.  Abstract ( 88 )   PDF (383KB) ( 334 )   Save This paper presents the principal characteristics of faults in various assemblages. Through the numerical simulation of faulting stress field , the stresses and their effects of forming fracture systems are summarized, pointing out generally regular Patterns for developed fractured near the faults. Finally, some reference suggestions for evaluation of fractured reservoir and reasonable location of wells to explore oil—bearing fractured reservoirs are presented in this paper. References | Related Articles | Metrics