The Hydrocarbon Source Analysis of Buried-Hill Reservoir of Ordovician in Western Lunnan Area of Tabei Uplift

Abstract

Abstract: The heavy oil in the western Lunnan area is characterized by low saturated hydrocarbon or low saturated hydrocarbon to aromatic hydrocarbon ratio, high content of wax and high colloid and asphaltene, showing that the oil experienced diffusion of light hydrocarbons and degradation of microorganism. It is concluded that the oil in this area is the mixed oil derived from Middle-Lower Cambrian and Middle-Lower Ordovician source rocks based on the oil biomarkers and reservoir bitumen analysis. According to the source rock development and hydrocarbon filling periods, it could also get the same conclusion that the oil in Ordovician buried hill reservoir is filled by hydrocarbons generated mainly from Middle-Lower Cambrian and Middle-Lower Ordovician source rocks.

Key words: source rock, biomarker, reservoir bitumen, hydrocarbon source, Tabei uplift

CLC Number:

TE112.114

ZHAO Meng-jun, QIN Sheng-fei, PAN Wen-qing, SONG Yan, WANG Zhao-ming, HAN Jian-fa, LIU Shao-bo, ZHANG Bao-min. The Hydrocarbon Source Analysis of Buried-Hill Reservoir of Ordovician in Western Lunnan Area of Tabei Uplift[J]. Xinjiang Petroleum Geology, 2008, 29(4): 478-481.

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