辽中凹陷优质烃源岩评价  

Evaluation on High-quality Source Rock, Liaozhong Depression

作　　者：范厚江[1] 罗小平[1,2] 李鹏[1] 

机构地区：[1]成都理工大学能源学院,四川成都610059 [2]油气藏地质及开发工程国家重点实验室.成都理工大学,四川成都610059

出　　处：《天然气技术与经济》2013年第4期18-21,77,共4页Natural Gas Technology and Economy

基　　金：十二五国家重大专项"辽中凹陷油气成藏规律及勘探方向研究"(编号:2011ZX05023-001-014)资助

摘　　要：油气是由烃源岩中的有机质生成的,因此有机质的丰度、类型及成熟度决定了生烃的潜力。辽中凹陷是辽东湾地区生烃潜力最大的凹陷,具有很大的油气开采价值。通过有机质的含量、热解、镜检及镜质体反射率等方法来评价辽中凹陷烃源岩的基本地化特征。研究结果表明:沙一段、沙三段和东三段这3套地层中好—最好的烃源岩占到了岩样总数的70%,有机质类型主要发育为Ⅱ1和Ⅱ2型,生烃门限在2 500 m左右深处。Oil and gas are generated from organic matter in source rock.Therefore,organic-matter abundance,type and maturity can determine hydrocarbon-generating potential.With the biggest potential in Liaodong Bay,the Liaozhong Depression is rich enough to be commercially exploited.For source rock in this depression,its geochemical characteristics are evaluated by some analysis,including organic-matter content,pyrolysis,microscopy,and vitrinite reflection ratio.Results show that(1)there are three suites of formation from moderate to good,including Sha 1,Sha 3 and Dong 3 members(;2)the best source rock accounts for 70 % of total rock samples(;3)the main organic-matter types contain II1 and II2;and(4)hydrocarbon-generating threshold is about 2500 m of burial depth.

关 键 词：辽中凹陷 有机质 烃源岩 生烃潜力 

分 类 号：P618.13[天文地球—矿床学]