The Occurrence of Oleananes in the Beibuwan Basin and Its Application to the Study of Maturity and Oil‐Source Rock Correlation

Acta Geologica Sinica - Tập 82 Số 3 - Trang 585-595 - 2008
Meijun Li1, Tieguan Wang1, Liu Ju2, Meizhu Zhang2, H. Lu3, Qinglin Ma2, Lihui Gao2
1State Key Laboratory of Petroleum Resource and Prospecting, Earth Sciences and Geoinformatics School, China University of Petroleum, Beijing 102249, China
2Southern Oil Exploration and Development Company, PetroChina, Guangzhou 510640, China
3Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510240, China

Tóm tắt

Abstract: The oleanane parameter, i.e., OP (oleananes/(oleananes+C30hopanes)) in the two sedimentary columns of the Beibuwan Basin, South China Sea, can be used to delimit the top of oil generation window, with Ro (/%) of 0.53 in Well M1 and 0.55 in Wells H1/Hd1/Hd2, respectively. Comparing with vitrinite reflectance (Ro/%), the OP features a dynamic range and can indicate the oil generation window more precisely. By using OP and other geochemical indices, the oil‐source correlation is also conducted. It suggests that the oils in wells M1 and M2 are derived from the source rocks in situ. The mudstone in Huachang uplift is not the main source rocks for oils in this area. The OP is also a useful oil‐source correlation parameter in some Tertiary lacustrine basins.

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