石油实验地质2017，Vol.39Issue(6)：755-762,769,9.DOI:10.11781/sysydz201706755
富有机质页岩中烃类动态运移对页岩气富集成藏的制约——以四川盆地龙马溪组为例
Constraints of hydrocarbon migration in Longmaxi shale in Sichuan Basin on shale gas accumulation
摘要
Abstract
A shale gas reservoir is typically a continuous hydrocarbon reservoir, and its formation and enrichment cannot be separated from the shale.The generation,migration and accumulation of natural gas are the key factors for the effective accumulation of shale gas in shale. The Longmaxi shale in Sichuan Basin has excellent geochemical parameters and reservoir characteristics as indicated by organic geochemical analysis,X?ray diffraction and scanning electron microscopy and on drilling and outcrop data.We studied the tectonic evolution of well PY1 in Sichuan Basin and the thermal evolution history of organic matter in the Longmaxi shale. Compared to the Barnett shale,the Long?maxi shale was buried deeper,and was preserved in an open state due to tectonic activity,which was unfavorable for free gas accumulation. Kerogen in the Longmaxi shale belongs to types I and II. The early formed hydrocarbons discharged out of the shale in the form of oil,and only the late formed,overmature gas and secondary gas(from oil cracking)remained in the shale system,restricting the effective accumulation of shale gas to some extent.关键词
有机质/生烃演化/页岩气/龙马溪组/四川盆地Key words
organic matter/hydrocarbon generation and evolution/shale gas/Longmaxi Formation/Sichuan Basin分类
能源科技引用本文复制引用
王佳,谭先锋,田景春,罗超,冉天,陈青,李霞,曾春林..富有机质页岩中烃类动态运移对页岩气富集成藏的制约——以四川盆地龙马溪组为例[J].石油实验地质,2017,39(6):755-762,769,9.基金项目
国家自然科学基金项目(No.41402118,41202043)和重庆市教委科学研究技术项目(KJ1601340)资助. （No.41402118,41202043）
