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01 June 1995, Volume 16 Issue 2 Previous Issue    Next Issue

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REVERSED STRUCTURE AND HYDROCARBON ACCUMULATION IN TARIM BASIN Hu Wangshui 1995, 16 (2):  89-95.  Abstract ( 87 )   PDF (662KB) ( 211 )   Save Tarim basin has undergone many times of tectonic movements since Sinian period, including compressional thrust movement which is dominated and extensional movement. These movements had at least two alternatives during evolution of the basin, that is, compressional thrust movement in pre-Mesozoic became extensional movement in Mesozoic: but the later was in turn replaced by compressional thrust movement in Cenozoic. These alternative changes, however, could form negative and positive reversed structures. Reversed structure in Tarim basin has close relations with its oil generation, migration, accumulation and preservation, providing a good structural environment for the form of giant and middle oil and gas fields in it. References | Related Articles | Metrics

THE RELATION OF THRUST-STRIKE SLIP STRUCTURE AND HYDROCARBON POTENTIAL IN LATE OF HERCYNIAN IN NORTH AREA OF TARIM BASIN Wei Gaoqi, Jia Chengzao, Yao Huijun 1995, 16 (2):  96-101.  Abstract ( 83 )   PDF (627KB) ( 262 )   Save Deformation structures including thrust nappe and strike slip shear formed in north area of Tarim basin in late of Hercynian orogeny being influenced by oblique collision of north margin of Tarim plate with south Tianshan mountain during orogeny and thrust-strike slip action, which produced many types of traps including unconformity, fault blocks anticline, buried hill and weathering crust. These traps are favorable for the formation of reservoir (oilfield) in north area of Tarim basin. References | Related Articles | Metrics

STRUCTURAL TYPE OF SOUTHWEST DEPRESSION, TARIM BASIN Xiao Ancheng, Chen Yusui, Hu Wangshui, Liu Xuefeng, Liu Shengguo 1995, 16 (2):  102-108.  Abstract ( 117 )   PDF (688KB) ( 267 )   Save Through the studies of surface geology and interpretation of great number of high-quality seismic sections, structural type of the southwest depression in Tarim basin may be divided into two major types, six subtypes and ten small types. The major types are: (1) basement rolling-in type, including basement thrust, strike-slip torsion, thrust-torsion complex and basement flexure: (2)caprock detachment type, involving tension fault depression, dual thrust, imbricate thrust, detachment anticline, gravity sliding and bend-faulted anticline. An oil reservoir has recently been discovered in detachment anticlines and the upper of dual structure. Therefore, it is estimated that various detachment structures, folded fault systems associated with torsion structure, basement flexure structure and basement rolling-in anticline are prospective area for oil and gas exploration in Tarim basin. References | Related Articles | Metrics

RESERVOIR-FORMING CHARACTERISTICS OF THE GAS-RESERVOIR (CARBONIFEROUS) IN BASHITUOPU STRUCTURE AND THE HYDROCARBON POTENTIAL OF PALEOZOIC IN MARKIT SLOPE Ai Huaguo, Lan Linying 1995, 16 (2):  109-113.  Abstract ( 92 )   PDF (524KB) ( 202 )   Save The forming mechanism of Bashituopu structure and oil/gas reservoir has been researched according to the disorder reflection characteristics of pre-Sinian basement in seismic profile across the well and cutting reflection characteristics of the top of Lower Permian, combirxing with geological and organic geochemical analysis data. It is considered that the forming time of Bachituopu structure matches oil and gas migration in deep Cambrian-Ordovician and Carboniferous. These formed the secondary natural gas reservoir in the top of Carboniferous and primary one of Silurian- Devonian, which are an important target for future oil and gas exploration in this area. Related Articles | Metrics

BIOLOGIC ASSEMBLAGE AND FACIES OF CAMBRIAN-ORDOVICIAN IN TARIM BASIN He Yuanbi, Wang Zhenya, Chen Jingshan, Zhou Lu, Shen Zhaoguo, Luo Li, Mu Shuguang 1995, 16 (2):  114-122.  Abstract ( 181 )   PDF (803KB) ( 286 )   Save Cambrian-Ordovician beds in Tarim basin are marine ones dominated by carbonatite, and with part of terrigenous clastic rocks and turbidites containing plenty of organism fossils. Varing palaeontological assemblage of different areas showed the difference in sedimentary environment and condition. They can be divided into 16 palaeontological assemblage types and 6 biofacies zones, providing the important reference for resumption of Cambrian-Ordovician sedimentary environment and seeking for profitable source sequences and reservoir rocks. References | Related Articles | Metrics

PALEOZOIC CONTOURITE AND ITS HYDROCARBON-BEARING PROPERTY OF MANGAR SAG IN TARIM BASIN Wang Rende 1995, 16 (2):  123-126.  Abstract ( 104 )   PDF (414KB) ( 212 )   Save Based on the analysis of seismic reflection characteristics, regional structure and core data, it is believed that the erosion trough developed in Paleozoic strata of Mangar sag in Tarim basin was resulted from contour current. The deposit primarily consists of contourite with a small amount of turbidite. This contourite is near the source rock and is composed of well-developed sandstone with stable shale cap. Therefore it is of hydrocarbon prospectiveness and can be regarded as the object for exploration in this area. References | Related Articles | Metrics

GEOLOGICAL INTERPRETATIONS OF T8 REFLECTION WAVE GROUP AND SEISMIC ANOMALOUS BODY IN SERIKBUYA AREA, TARIM BASIN Yang Pin 1995, 16 (2):  127-134.  Abstract ( 86 )   PDF (755KB) ( 169 )   Save T8 reflection wave group (Paleogene) is one of the most noteble and stable seismic reflection sequences in Serikbuya area of Tarim basin, which includes three types of seismic facies: high-amplitude, highly continuous, polyphases; high-amplitude, highly continuous, dual phases, and moderate-amplitude, moderately continuous, thinning out, indicating the sedimentary dominated by lagoonal gypsum and gypsiferous mudstone, and normal marine limestone probably developed in southwestern part of Serikbuya. In accordance with the appearance, seismic anomaly reflection of T8 wave group can be divided into hummocky, lenticular and bank anomalous body attributed to paleogeomorphology response, lithological response and fault response. T8 sequence is believed to have no reservoir available, but it can be a good areal caprock. References | Related Articles | Metrics

STUDY AND APPLICATION OF IDENTIFYING NATURAL GAS RESERVOIR BY WELL-LOG DATA IN JUNGGAR BASIN Zhao Xiyuan 1995, 16 (2):  135-139.  Abstract ( 69 )   PDF (494KB) ( 202 )   Save Applying mutiple cross plot combined with the well-log data of neutron, density, compressional wave, shear wave, neutron-gamma and repeat formation testing for the first time, this paper summrizes and draws up ten-odd technic methods which can identify natural gas reservoir rapidly and directly, and obtain better effects. These methods can be popularized. References | Related Articles | Metrics

THE EVOLUTIONCHARACTERISTICS AND MIGRATION EFFECT OF LIQUID PRODUCTS BY HYDRO-PYROLYSIS MODELING OF MATURE HUMIC COAL Gao Gang, Hao Shisheng, Gang Wenzhe, Cheng Dingsheng 1995, 16 (2):  140-143.  Abstract ( 76 )   PDF (450KB) ( 200 )   Save Based on the analysis of the geochemical characteristics of liquid products by hydro-pyrolysis modeling of mature humic coal, a discussion was made for evolutionary pattern of its yields group composition and chromatographic features of the residual and expelled hydrocarbons. It is pointed out that the difference in characteristics between residual and expelled hydrocarbons resulted from the migration effects which should be considered in the course of oil-source correlation and the research of organic matter type and its maturity. References | Related Articles | Metrics

ANALYSIS OF THE FORMATION OF RESERVOIR IN MABEI OILFIELD BY GEOCHEMICAL DATA Yang Jianqiang, Kang Sufang, Wu Hongyi, Xu Bin 1995, 16 (2):  144-148.  Abstract ( 102 )   PDF (355KB) ( 194 )   Save This paper points out the direction of oil and gas migration during the formation of Wuerhe(P2w) reservoir and Baikouquan(T1b) reservoir in Mabei oilfield and forcasts reservoir-formation period based on the analysis data of 6 oil samples and 5 oil sand samples from Mabei oilfield, integrated with thermal evolution histary of hydrocarbon source rock of Mahu sag in Junggar basin. References | Related Articles | Metrics

LIMIT OF BARRIER-LAYER PETRO-PHYSICAL PROPERTY IN LATE OF HIGH WATER CUT STAGE IN DAQING OIL-FIELD-THE EXAMPLES FROM LAMADIANZI, SAERTU AND XINGSHUGANG OIL-FIELDS Liu Chunlin, Wang Hongxing, Shang Yuqiu 1995, 16 (2):  149-152.  Abstract ( 154 )   PDF (323KB) ( 221 )   Save Through the analysis of lithological and petrophysical properties for more than 200 barrier-layer samples from 7 coring wells in Lamadianzi, Saertu and Xingshugang oilfieids and integrating with core analysis data from inspection well over the yeas, this pater presents the varied regular pattern of lithological, petrophysical and hydrocarbon-cearing properties, determins the upper limit of barrier-layer permeability of 1.0×10-3μm2 integrated with water-drive experiment. Related Articles | Metrics

A NEW METHOD FOR THE EARLY STAGE INTERPRETATJON OF PRESSURE BUILD-UP CURVES Hu Jianguo 1995, 16 (2):  153-159.  Abstract ( 102 )   PDF (511KB) ( 201 )   Save Upon the revised Horner equation by Seetharam and Jenes. a new method for the early stage interpretation of pressure build-up curve was developed. The results of well test modeling and field application indicated that the results of processing afterflow data and caculating formation parameters by means of this new method are gene-ally identical with the ones of estimating middle stage data of build-up pressure using rype-curve match and Horner's method. Furthermore, this new method is simpler than the type-curve match. References | Related Articles | Metrics

A PRELIMINARY STUDY OF ECONOMIC LIMIT WATER CUT INCONGLOMERATE RESERVOIRS, KARAMAY OILFIELD Zhang Yu, Du Jintang 1995, 16 (2):  160-164.  Abstract ( 100 )   PDF (494KB) ( 214 )   Save Based on the input-output balance theory, a method for evStimating economic limit water cut is presented through analyses of components and changes of production cost of waterflooding conglomerate reservoirs in Karamay oilfield. Results of its application in typical reservoirs showed that economic limit water cut is 92% for the 1st-class reservoirs, and 90% for the 2nd- and 3rd-class reservoirs. Ultra-high water cut bound for cyclic low-efficiency to inefficient oilfield operation is 93.5%. Related Articles | Metrics

ARRANGING METHODS OF RESERVOIR PETROPHYSICAL PARAMETERS UNDER THE OVERBURDEN PRESSURE Lei Hongguang, Fang Yisheng, Zhu Zhongqian 1995, 16 (2):  165-169.  Abstract ( 83 )   PDF (401KB) ( 247 )   Save Taking Carboniferous reservoir in the middle part of Tarim basin for example, this paper gives the correlated formula and numerical value for various petrophysical parameters under effective overburden pressure, and presents a Set of arranging methods for the petrophysical parameters under overburden pressure. References | Related Articles | Metrics

THE MEASURES OF ENHANCED OIL RECOVERY IN VISCOUS OIL RESERVOIR BY STEAM STIMULATION PROCESS Liu Bin 1995, 16 (2):  170-172.  Abstract ( 68 )   PDF (385KB) ( 182 )   Save This paper summerizes the development experience in steam stimulation in viscous oil reservoir of Liaohe oilfield and presents five measures used to improve production efficiency by steam stimulation, which included infill drilling, sidetrackings separate layer steam injection, ensuring a complete producing period of steam-stimulated well and boundary drainage. Feasibility of these measures has been verified in Liaohe viscous oilfield, and can be popularized. References | Related Articles | Metrics

A DISCUSSION ON BACHU MOVEMENT Li Yibin, Li Luozhao, Jiang Yanwen, Liu Bingli, Xiao Chuantao, Zhou Shuyuan 1995, 16 (2):  173-176.  Abstract ( 162 )   PDF (324KB) ( 202 )   Save The "Bachu movement" and correlated formations proposed by predecessors has been studied in detail when researching the Carboniferous-Permian in Tarim basin. It is considered that the so-called "Bachu movement" doesn’t really exist based on field observation and indoor analysis of conodont in section. It is in doubt about Conodontophoridia fossil's data on which were based and "parallel-unconformity" established from that "movement". References | Related Articles | Metrics

PALEOZOIC CONTOURITE AND ITS HYDROCARBON-BEARING PROPERTY OF MANGAR SAG IN TARIM BASIN Wang Rende 1995, 16 (2):  177-181.  Abstract ( 100 )   PDF (345KB) ( 146 )   Save Based on the analysis of seismic reflection characteristics, regional structure and core data, it is believed that the erosion trough developed in Paleozoic strata of Mangar sag in Tarim basin was resulted from contour current. The deposit primarily consists of contourite with a small amount of turbidite. This contourite is near the sourre rock and is composed of well-developed sandstone with stable shale cap. Therefore it is of hydrocarbon prospectiveness and can be regarded as the object for exploration in this area. References | Related Articles | Metrics