Geochemical Characteristics, Origin and Factors Controlling Formation of Marine Source Rock in Lower Congo Basin

• Published in: Di qiu ke xue yu huan jing xue bao Vol. 36; no. 4; pp. 87 - 98
• Main Authors: CAO, Jun, ZHONG, Ning-ning, DENG, Yun-hua, KANG, Hong-quan, SUN, Yu-mei, LIU, Yan, DAI, Na, HUANG, Xiao-yan, ZHU, Shun-ling
• Format: Journal Article
• Language: Chinese
• Published: 01.12.2014
• ISSN: 1672-6561

The characteristic of petroleum in the deepwater area of Lower Conga Basin is marine, so that the marine source rock above the salt is a concern. According to the geochemical analysis data and geological information of marine source rock in Lower Congo Basin, the geochemical characteristics, hydrocarbon potential, origin and genetic types for the four sets of marine source rocks were comprehensively discussed, and the main controlling factors for the different genetic types of marine source rocks were analyzed. The results show that the marine source rocks develop above the salt rock of Lower Congo Basin, and the abundances of organic matters of them are moderate-good with types II and III of kerogens, and the source rocks are consist primarily of the marine endogenous type and marine mixed type; marine source rocks in Lower Congo Basin enter the oil-generating window at the depth of about 3 500 m, and mature marine source rocks are important sources of petroleum in the deepwater area of Lower Congo Basin; be