Buried-hill hydrocarbon genesis and accumulation process in Bongor Basin,Chad

doi:10.7623/syxb201711004

Acta Petrolei Sinica ›› 2017, Vol. 38 ›› Issue (11): 1253-1262.DOI: 10.7623/syxb201711004

• Petroleum Exploration • Previous Articles Next Articles

Buried-hill hydrocarbon genesis and accumulation process in Bongor Basin,Chad

Li Wei^1,2, Dou Lirong^1,3, Wen Zhigang¹, Zhang Guangya², Cheng Dingsheng², Du Yebo², Hu Ying²

1. College of Resources and Environment, Key Laboratory of Exploration Technologies for Oil and Gas Resources of the Ministry of Education, Yangtze University, Hubei Wuhan 430100, China;
2. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China;
3. China National Oil and Gas Exploration and Development Corporation, Beijing 100034, China

Received:2017-03-14 Revised:2017-09-06 Online:2017-11-25 Published:2017-12-08

乍得Bongor盆地潜山油气成因和成藏过程

李威^1,2, 窦立荣^1,3, 文志刚¹, 张光亚², 程顶胜², 杜业波², 胡瑛²

1. 长江大学资源与环境学院长江大学油气资源与勘探技术教育部重点实验室湖北武汉 430100;
2. 中国石油勘探开发研究院北京 100083;
3. 中国石油天然气勘探开发公司北京 100034

通讯作者: 窦立荣,男,1965年8月生,1987年获江汉石油学院学士学位,2004年获中国科学院博士学位,现为中国石油天然气勘探开发公司教授级高级工程师,主要从事跨国油气勘探和石油地质综合研究。Email:doulirong@cnpcint.com
作者简介:李威,男,1988年10月生,2011年获长江大学学士学位,现为长江大学博士研究生,主要从事油气藏形成与分布方面的研究工作。Email:liwei123456@petrochina.com.cn
基金资助:
国家重大科技专项（2011ZX05029）和中国石油天然气股份有限公司科技专项（2013D-0902）资助。

Abstract

Abstract:

The discovery of buried-hill fracture reservoirs in Pre-Cambrian basement, Bongor Basin, opens a new frontier for onshore hydrocarbon exploration in Africa. The issue of buried-hill oil source is one of the factors to restrict the exploration process in this region. To solve this problem, the analytical test data of organic geochemistry from buried-hill crude oil are fully used to study the biomarker compounds and geochemical characteristics of buried-hill crude oil in M-P and B regions as well as analyze the oil-source relation of buried-hill crude oil in M-P and B regions with the source rocks in M and BN sags. In combination with thermal evolution history and structural evolution history of Bongor Basin, the hydrocarbon accumulation processes of buried-hill reservoir belts in M-P and B regions are analyzed. The research results show that the buried-hill crude oil in M-P region is mainly derived from the source rocks in M sag, and the buried-hill crude oil in B region accepts contributions from the source rocks in M and BN sags. The source rocks in M sag supplied hydrocarbons to buried hills in B region from the middle Late Cretaceous, while during the middle-late Late Cretaceous, the crude oil generated from the source rocks of M and BN sags commonly accumulated in the buried-hill belts of B region. Meanwhile, the crude oil generated from the source rocks of M sag migrated and accumulated in the buried-hill belt of M-P regions, forming buried-hill hydrocarbon reservoirs.

Key words: buried-hill, hydrocarbon genesis, accumulation process, Bongor Basin, Chad

摘要：

Bongor盆地前寒武系基岩潜山裂缝油藏的发现打开了非洲陆上油气勘探的新领域。潜山油源问题是制约Bongor盆地勘探进程的因素之一。为了解决这一问题，充分利用潜山原油有机地球化学分析测试数据，研究M-P区、B区潜山原油的生物标志化合物组成和地球化学特征，分析M-P区、B区潜山原油与M凹陷烃源岩和BN凹陷间的油源关系；结合Bongor盆地热演化史以及构造演化史，分析M-P区、B区潜山油藏带的油气成藏过程。研究结果表明：M-P区潜山原油主要来自M凹陷烃源岩，B区潜山原油接受M凹陷烃源岩和BN凹陷双重贡献。M凹陷烃源岩在晚白垩世中期开始向B区潜山带供烃，晚白垩世中期—晚期，M凹陷、BN凹陷烃源岩所生成的原油共同在B区潜山带聚集成藏，同时M凹陷烃源岩生成的原油在M-P区潜山带运移聚集形成潜山油气藏。

关键词: 潜山, 油气成因, 成藏过程, Bongor盆地, 乍得

CLC Number:

TE122.1

Li Wei, Dou Lirong, Wen Zhigang, Zhang Guangya, Cheng Dingsheng, Du Yebo, Hu Ying. Buried-hill hydrocarbon genesis and accumulation process in Bongor Basin,Chad[J]. Acta Petrolei Sinica, 2017, 38(11): 1253-1262.

李威, 窦立荣, 文志刚, 张光亚, 程顶胜, 杜业波, 胡瑛. 乍得Bongor盆地潜山油气成因和成藏过程[J]. 石油学报, 2017, 38(11): 1253-1262.

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(收稿日期2017-03-14改回日期2017-09-06编辑宋宁)

Buried-hill hydrocarbon genesis and accumulation process in Bongor Basin,Chad

乍得Bongor盆地潜山油气成因和成藏过程

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