Existence and implications of hop-17(21)-enes in the lower Cretaceous of the Saihantala Sag, Erlian Basin, China

作     者：Luo Qingyong Yu Shijun Liu Yan Zhang Yanqi Han Hui Qi Lin Zhong Ningning 

作者机构：State Key Laboratory of Petroleum Resources and ProspectingChina University of PetroleumBeijing 102249China Jiangxi Division of Geological Prospecting CenterSinomaShang-raoJiangxi 334000China 

出 版 物：《Petroleum Science》 (石油科学（英文版）)

年 卷 期：2012年第9卷第2期

页      面：154-160页

核心收录：

学科分类：0820[工学-石油与天然气工程] 070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 08[工学] 082002[工学-油气田开发工程] 

基　　金：supported by the National Science and Technology Major Project of China (2008ZX05018-002) 

主　　题：Biomarkers hop-17(21)-ene biological source immature oil Erlian Basin 

摘      要：C31- to C35-hop-17（21）-enes are identified by gas chromatography-mass spectrometry （GC-MS） analysis to exist as double isomers in most samples of the Aershan Formation and members 1 and 2 of the Tenggeer Formation from well SH3. Comprehensive organic geochemistry and organic petrology study indicates that algae and bacteria are the main biological source of lower Cretaceous sediments in the Saihantala Sag, and this is in accordance with the existence of hop-17（21）-enes. The similar distributions of hop-17（21）-enes and hopanes of these samples indicate that hop-17（21）-enes were transformed into hopanes through hydrogenation during diagenesis processes. The existence of hop-17（21）-enes means that not only the formation of organic matter is related to an anoxic environment and a biological source of algae and bacteria, but also hop-17（21）-enes are direct indicators of hydrocarbon rock at an immature to low-maturity stage. High hydrocarbon conversion ratio, algae and bacteria source and a high abundance of organic matter suggest that the Saihantala Sag has the potential to generate immature to low-maturity oil, which may be of great significance for oil exploration in the Erlian Basin.