Identification of Chief Hydrocarbon Source Rocks in Lishu Fault Depression and Their Geochemical Characteristics
详细信息
- 责任者：Song Zhenxiang (Wuxi Research Institute of Petroleum Geology ; SINOPEC ; Wuxi 214126 ; China) ; Zhou Zhuoming
- 刊名：Petroleum Geology & Experiment
- 出版年：2013
- 卷期：35(4)
- 关键词：烃源岩 ; source rocks ; 有机地球化学 ; organic geochemistry ; 松辽平原 ; Songliao Plain
- 页码：p.438-444
- 图表：illus., 2 tables, 22 refs.
- 分类号：1003
- issnNo：ISSN1001-6112
- isbnNo：CN32-1151/TE
摘要
Based on the hydrocarbon generation potential of 4 sets of source rocks developed in the Lishu Fault Depression,the results illustrated that the chief hydrocarbon source layer is K1sh and the secondary layer is K1yc;meanwhile,the effective source rocks of K1h and K1d formations only developed in some certain areas.We made a cluster analysis to source rock samples(TOC > 0.5%) based on more than 20 variables,and the results have shown that the source rock samples can be divided into 4 types and the geochemical characteristics of 4 types of source rocks are different in many respects,such as sedimentary environment,hydrocarbon generation potential,origin of organic matters and maturity stages.Type C and D source rocks have the highest hydrocarbon generation potential and they have good comparability with crude oils.Taking into account the plane distribution of source rocks,type C source rocks mainly distribute in Siwujiazi,Pijia and Sangshutai deep depressions with deep lake facies.Meanwhile,type A,B and D source rocks mainly distribute in Sujiatun sag,Shuanglong sag and Taipingzhuang,Qikeshu,Qinjiatun areas along the basin margins with shallow lake facies,semi-deep lake facies and swamp subfacies within delta plain sedimentary environment.