Stimulations on generation, expulsion and retention of liquid hydrocarbons in source rocks deposited in lacustrine basin and their significance in petroleum geology

被引：3
|
作者：
Jin Q. [1 ]
Zhang H. [1 ]
Cheng F. [1 ]
Xu J. [1 ]
机构：
[1] School of Geosciences in China University of Petroleum(East China), Qingdao
来源：
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2019年 / 43卷 / 05期
关键词：
Composition difference between expulsion and retention hydrocarbon; Hydrocarbon generation; Lamellar source rock; Laminated source rock; Liquid hydrocarbon expulsion; Massive source rock;
D O I：
10.3969/j.issn.1673-5005.2019.05.005
中图分类号：
学科分类号：
摘要：
Massive, lamellar and laminated shales are typical lithology of source rocks deposited lacustrine basins. In order to investigate quantities and constituents of expelled and remaining liquid hydrocarbons from/in the source rocks, the authors conducted a series of stimulations in high-temperature and high-pressure conditions on the source rock samples, and found that 77.8% liquid hydrocarbons were expelled from the massive sample, and about 55% liquid hydrocarbons were expelled from the lamellar and laminated samples. There are obvious differences in some parameters between expelled and remaining liquid hydrocarbons from/in the three kinds of source rocks: radio of gammacerane/C31-hopane less in expelled hydrocarbons from the massive source rocks than in remaining corresponding components, but exactly the opposite in the hydrocarbons from/in lamellar and laminated source rocks. There are different appearances between the expelled and remaining liquid hydrocarbons but no corresponding to the lithology of the source rocks: the lighter hydrocarbons being more in the expelled components and the heavy hydrocarbons being more in the remaining, Ts/Tm radio of hopanes in the expelled hydrocarbons being bigger than that in remaining components, appearance of C29ββ/(ββ+αα) radio being in the same way, tricyclic terpane/pentacyclicterpane and ΣC27/ΣC29 of cholestanes radios being higher in the expelled hydrocarbons than in the remaining hydrocarbons. Parameters such as OEP respecting thermal maturity and Pr/Ph corresponding to the depositional environment of the source rocks are rather similar either in expelled hydrocarbons or in remaining components. The authors concluded that quantity and composition differences of expelled and remaining hydrocarbons from/in different source rocks should be considered carefully in oil generation, primary migration and oil correlation in general petroleum geology. © 2019, Periodical Office of China University of Petroleum. All right reserved.
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页码：44 / 52
页数：8
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