论文成果

Method for identifying effective carbonate source rocks: a case study from Middle-Upper Ordovician in Tarim Basin, China

摘要:Hydrocarbon expulsion occurs only when pore fluid pressure due to hydrocarbon generation in source rock exceeds the force against migration in the adjacent carrier beds. Taking the Middle-Upper Ordovician carbonate source rock of Tarim Basin in China as an example, this paper proposes a method that identifies effective carbonate source rock based on the principles of mass balance. Data from the Well YW2 indicate that the Middle Ordovician Yijianfang Formation contains effective carbonate source rocks with low present-day TOC. Geological and geochemical analysis suggests that the hydrocarbons in the carbonate interval are likely self-generated and retained. Regular steranes from GC-MS analysis of oil extracts in this interval display similar features to those of the crude oil samples in Tabei area, indicating that the crude oil probably was migrated from the effective source rocks. By applying to other wells in the basin, the identified effective carbonate source rocks and non-source rock carbonates can be effectively identified and consistent with the actual exploration results, validating the method. Considering the contribution from the identified effective source rocks with low present-day TOC (TOCpd) is considered, the long-standing puzzle between the proved 3P oil reserves and estimated resources in the basin can be reasonably explained.

关键字:Effective carbonate source rock; Mass balance approach; Low present-day TOC; Ordovician; Tarim Basin

ISSN号:1672-5107

卷、期、页:卷: 17 期: 6 页: 1491-1511

发表日期:2020-12-01

影响因子:2.095600

期刊分区(SCI为中科院分区):二区

收录情况:SCIE(科学引文索引网络版),CSCD(中国科技引文期刊)(核心)

发表期刊名称:PETROLEUM SCIENCE

参与作者:Chen, Zhuo-Heng,Hu, Mei-Ling,Huo, Zhi-Peng

通讯作者:吴松,马奎友,庞礴

第一作者:陈君青,庞雄奇,刘洛夫

论文类型:期刊论文

论文概要:陈君青,庞雄奇,吴松,Chen, Zhuo-Heng,Hu, Mei-Ling,刘洛夫,马奎友,庞礴,Huo, Zhi-Peng,Method for identifying effective carbonate source rocks: a case study from Middle-Upper Ordovician in Tarim Basin, China,PETROLEUM SCIENCE,2020,卷: 17 期: 6 页: 1491-1511

论文题目:Method for identifying effective carbonate source rocks: a case study from Middle-Upper Ordovician in Tarim Basin, China