我国中部盆地古老碳酸盐岩有效烃源岩存在的典型实例分析  

Typical cases analysis of effective source rocks existence in ancient carbonate rock in the middle basins of China

作　　者：谢云欣[1] 周文[1] 过敏[1] 陈义才[1] Qiumei Zhou 

机构地区：[1]油气藏地质及开发工程国家重点实验室(成都理工大学),成都610059 [2]Department of Energy and Mineral Engineering, Pennsylvania State University

出　　处：《岩性油气藏》2016年第6期16-22,共7页Lithologic Reservoirs

基　　金：国家重大科技专项"海相页岩气储层评价方法研究"(编号:2016ZX05025002-005);国土资源部地质调查项目"中国西部大型盆地碳酸盐岩成藏条件及资源潜力研究"(编号:1212011220757)联合资助

摘　　要：针对古老碳酸盐岩能否成为有效烃源岩的问题,对我国中部盆地典型古老碳酸盐岩热解的实验结果和成烃实例的分析等展开研究,讨论了古老碳酸盐岩烃源岩能否有效生烃和排烃的问题。结果表明,泥灰岩和泥晶灰岩等相对富有机质岩石,热解模拟生烃量高。在数值模拟初次运移时期,泥灰岩和泥晶灰岩等烃源岩排油较为困难,排气是主要形式,且排气方式以微裂缝排气和扩散排气为主,所以,该类灰岩可以成为有效气源岩,这一认识为古老碳酸盐岩层系的烃源岩评价提供了理论依据。The question if ancient carbonate rocks can be effective source rocks was discussed through typical pyrolysis experiments results and examples in Ordos Basin and Sichuan Basin in central China. The results indicate that rocks such as marlstone and micrite with relatively high organic matter content have high quantity of hydrocarbon generation during pyrolysis experiments, and oil expulsion is probably difficult during primary migration, and gas expulsion is the main form which is mainly expulsed through microfracture and diffusion. It is suggested that marlstone and micrite with relatively high organic matter content are effective gas source rocks. This understanding provides theoretical basis for source rock evaluation of ancient carbonates.

关 键 词：古老碳酸盐岩 有效烃源岩 生烃潜力 排烃方式 

分 类 号：P618.13[天文地球—矿床学]