摘要：Sediments with organic matter content (total organic carbon) TOC ≤ 0.5% which can act as effective source rocks are critical and challenging in the field of petroleum geology. A new method is proposed through a case study to identify and evaluate the effective source rocks, which is applied to study the changing characteristic of hydrocarbon-generation potential index with depth. The burial depth corresponding to the beginning of hydrocarbon-generation potential index reduction represents the hydrocarbon expulsion threshold in source rocks. Then, new identification standards are established for discrimination of effective source rocks of Middle–Upper Ordovician in Tarim Basin. The critical value of TOC for effective source rocks change with their burial depth: the TOC > 0.5% with source rock depth > 4000 m, TOC > 0.4% with depth >4500 m, TOC > 0.3% with depth > 5000 m, TOC > 0.2% with depth >5500 m. Based on the new criteria, effective source rocks in the Middle–Upper Ordovician are identified and their total potential hydrocarbon resources is evaluated, reaches 0.68 × 10⁹ t in the Tazhong area, which is 65.4% higher than that of previous studies and consistent with the exploration result. Thus, this new method is of significance to resource evaluation and can be applied in the carbonate source rocks and mudstone source rocks with high degree of exploration.
© The Author(s) 2019.

ISSN号：0144-5987

卷、期、页：v 38,n 2,p417-433

发表日期：2020-03-01

影响因子：1.381700

期刊分区（SCI为中科院分区）：四区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：Energy Exploration and Exploitation

参与作者：杨海军

通讯作者：庞礴,汪英勋

第一作者：陈君青,庞雄奇,刘托托,胡涛

论文类型：期刊论文

论文概要：庞礴,陈君青,庞雄奇,刘托托,杨海军,汪英勋,胡涛，Possible new method to discriminate effective source rocks in petroliferous basins: A case study in the Tazhong area, Tarim Basin，Energy Exploration and Exploitation，2020，v 38,n 2,p417-433

论文题目：Possible new method to discriminate effective source rocks in petroliferous basins: A case study in the Tazhong area, Tarim Basin