Xinjiang Petroleum Geology

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    INDICATOR OF GEOLOGIC EVALUATION FOR PRELIMINARY COALFORMED OI PROSPECTING IN COAL-BEARING BASIN
    Hu Sherong, Wu Yinye
    Xinjiang Petroleum Geology    1997, 18 (3): 217-220.  
    Abstract （113）      PDF（pc） （369KB）（442）       Save
    The sedimentary environment,source thickness and geochemical characteristics in the Jurassic coal-bearing basin, northwestern China were examined and compared with several most famous coal-formed oil-bearing basins in the world. This paper puts forward three indicators of geologic evaluation for preliminary coal-formed oil prospecting in the Jurassic coal-bearing basin, northwestern China, namely, conventional geochemical evaluation indicator,indicators for sedimentary thickness,structural evolution and source maturity, and sequence stratigraphic indicator of source rock in the basin, based on sequence stratigraphy of coal-bearing formation, thickness of coal measure and mudstone, source thickness in geologic history, and present overlying formation thickness.
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    SIMULATION OF HYDROCARBON EXPULSION IN COAL, TAOYUAN - RONGXINGTUN AREA, LIAOHE BASIN
    He Guangyu, Chen Rongshu, Zhang Jiahua, Tang Zhonghua, Zhang Weihua
    Xinjiang Petroleum Geology    1997, 18 (3): 221-224.  
    Abstract （139）      PDF（pc） （382KB）（237）       Save
    Based on the recent study results of hydrocarbon expulsion and recent advances made in coal study, it is suggested that the main mechanism for oil and gas migration in coal is hydrocartbon expulsion as an independent phase along the microfracture driven by the elevated pressure resulting from hydrocarbon generation. Hydrocarbon saturation and fracturing pressure are the main controls on hydrocarbon expulsion. The model of hydrocarbon expulsion along the microfracture in coal is then developed, which proved to be reliable and valid while it was applied in the study of hydrocarbon expulsion in Taoyuan - Rongxingtun area, Liaohe basin.
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    GENETIC CLASSIFICATION OF OILS AND PREDICTION OF FAVORABLE OIL-BEARING ZONES IN LUNAN ARCH IN THE HINTERLAND OF JUNGGAR BASIN
    Wang Yutao
    Xinjiang Petroleum Geology    1997, 18 (3): 225-230.  
    Abstract （189）      PDF（pc） （481KB）（397）       Save
    Oils from Lunan arch are classified into five types, namely, Xiayan type- -mature to highly mature Paleozoic oils, Shixi type- -highly mature Paleozoic oils, Lunan type- mature Mesozoic and Paleozoic mixed oils, Dixi type- mature Mesoozoic oils, and Dinan type- -low mature to mature Paleozoic oils, based on the physical properties and geochemical data of oils. According to the regular distribution of different oil types in section, along with the trap conditions, three favorable hydrocarbon-bearing zones are circled out. The west part of luliang uplift and Dabasong arch are the moderately. explored areas, the area from north Dongdaohaizi sag to the east side of Wucaiwan sag is the favorable target for Paleozoic self-sourced, self-storaged reservoir, and in the uplift zone at the sag margin it is highly probable to find the fault-screened oil and gas reservoirs.
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