Advances in Geosciences 地球科学前沿, 2019, 9(5), 351-359 Published Online May 2019 in Hans. //www.hhsas.com/journal/ag https:////www.hhsas.com/10.12677/ag.2019.95039
文章引用: 杨爱英. 北塘凹陷沙三段烃源岩特征实验评价[J]. 地球科学前沿, 2019, 9(5): 351-359.
Experimental Evaluation of Hydrocarbon Source Rocks in the Third Member of Shahejie Formation, Beitang Depression
College of Earth Sciences, Yangtze University, Jinzhou Hubei
Received: May 1st , 2019; accepted: May 15th , 2019; published: May 22nd , 2019
According to the source rock samples of the Third Member of Shahejie formation in Beitang De-pression, the organic matter abundance, types and maturity were discussed. The organic geo-chemical characteristics of source rocks in the Third Member of Shahejie formation were syste-matically analyzed through effectively determining the paralysis of rocks, organic carbon, chloro-form asphalt “A”, vitrinite reflectance of sedimentary rocks, kerogen macerals and types. The re-sults show that the thickness of source rocks in the Third Member of Shahejie formation is rela-tively large with nearly 1000 - 1500 m. The TOC content is 0.4% - 2.0%, and the total content of source rocks is relatively high. The main types of source rocks are type I and type II kerogen, and the organic matter type is better. The lower part of the Third Member of Shahejie formation is the main source rock in Beitang Sag, with high organic matter abundance and ideal conversion effi-ciency. The content of sapropelic and crustal formations is positively correlated with hydrocarbon generation potential of source rocks, while vitrinite content is inversely correlated with hydro-carbon generation capacity of source rocks. It is further verified that the main source rocks are sapropelic and crustal formations. The main sags of source rocks in the Third Member of Shahejie formation belong to late hydrocarbon expulsion with large hydrocarbon expulsion and good prospects for exploration and development. Keywords
Beitang Depression, Third Member of Shahejie Formation, Organic Matter Abundance, Organic Matter Type, Source Rock