四川盆地下古生界页岩气研究现状及勘探前景

Shale Gas Research and Exploration Prospects of Lower Paleozoic in Sichuan Basin

页岩气一般被看作是以吸附和游离状态赋存于暗色泥岩及其所夹砂岩和粉砂岩地层中的天然气聚集.四川盆地作为我国主要的天然气产区,共发育6套烃源岩,而下古生界含气系统的有效烃源岩主要为下寒武统筇竹寺组黑色页岩和下志留统龙马溪组黑色笔石页岩.该两套页岩是四川盆地比较有利的页岩气含气层位,综合对其生、储、盖、保等条件的研究,对四川盆地下古生界筇竹寺组和龙马溪组页岩气勘探前景进行了评价.

We could see the shale gas as a kind of gas accumulation of adsorption and Free State can occur in the dark mud and folders sandstone and siltstone formations. Sichuan Basin, China＇s major natural gas producing areas, a total development of the six sets of source rocks, and the effective source rocks of the lower Paleozoic gas system are the black shale of Qiongzhusi Forma- tion of Lower Cambrian and the black graptolite shale Long maxi Formation of Lower Silurian. The two sets of shale Sichuan Basin favorable gas - bearing shale gas bit. Through the comprehensive study of its hydrocarbon source rock, reservoir, caprock and storage conditions, to evaluate the quality of shale gas exploration prospects of Qiongzhusi Formation and Longmaxi Formation of Lower Paleozoic in Sichuan Basin .