摘要：The Wuli and Saihan sags in the Erlian Basin, the most petroliferous basin in northern China, were analysed with bulk geochemical analysis, carbon isotopic composition, microthermometry of fluid inclusions, and basin modelling to characterize the organic matter abundance and composition, to construct source rock development models, and to reveal the relationship between source rock development and hydrocarbon accumulation. The samples display wide variations in total organic carbon content and Rock-Eval indices, suggesting heterogeneity of organic matter richness and type. The Wuli Sag has oxic depositional environment, high productivity, and high total organic carbon content; the effective oil source rocks are mainly distributed in the deep sag where the productivity is high; and there is plenty of organic matter left and preserved after degradation. In the Saihan Sag, there is a small amount of organic matter deposited because of low productivity; the effective oil source rocks are mainly distributed in the slope by the deep sag where the reducing degree is the strongest. The source rock development models controlled the geochemical characteristics and distribution of source rocks, which are the keys to hydrocarbon potential and accumulation. The oil of Wuli Sag is mainly distributed in the deep sag, whereas the oil of Saihan Sag is mainly distributed in the slope by deep sag, which is in agreement with the previously effective oil source rocks distribution. In the strong division sags, the region where source rock distributed is beneficial to hydrocarbon accumulation. The conclusions may have important implications for petroleum exploration in other small lacustrine depositional systems.

关键字：organic matter accumulation petroleum accumulation productivity redox conditions Saihan Sag Wuli Sag

ISSN号：0072-1050

卷、期、页：卷: 54 期: 3 页: 1730-1744

发表日期：2019-05-01

期刊分区（SCI为中科院分区）：三区

收录情况：SCI（科学引文索引印刷版）,ESI（基本科学指标数据库）,SCIE（科学引文索引网络版）

发表期刊名称：GEOLOGICAL JOURNAL

参与作者：Imin, Ablimit,Rexit, Madiniyat,Jiang, Hang

通讯作者：Ding, Xiujian,Gao, Changhai

第一作者：柳广弟

论文类型：期刊论文

论文概要：Ding, Xiujian,柳广弟,Imin, Ablimit,Rexit, Madiniyat,Gao, Changhai,Jiang, Hang，Relationship between source rock development and petroleum accumulation in the Erlian Basin, northern China，GEOLOGICAL JOURNAL，2019，卷: 54 期: 3 页: 1730-1744

论文题目：Relationship between source rock development and petroleum accumulation in the Erlian Basin, northern China