内蒙古东部地区富有机质泥页岩发育特征与页岩气资源潜力初探

Development characteristics of organic-richshale and resource potential of shale gas in the east region of inner Monggolia

页岩气是以吸附和游离相赋存于泥页岩或泥页岩层系中的天然气,是一种重要的非常规天然气资源类型。通过对以往地质资料进行综合研究,认为内蒙古东部地区海拉尔、二连两个盆地下白垩统大磨拐河组、南屯组地层暗色泥页岩发育广泛,其暗色页岩层单层厚度、埋深、总有机碳含量(TOC)和热演化程度(Ro)等特征,具备页岩气形成的基本地质条件,具有一定的页岩气资源潜力。

Shale gas is an important unconventional natural gas remained in the organic rich shale of free or absorbed.Through comprehensive studies of the past date of Hailar basin and Erenhot basin, it is considered that the lower Cretaceous(K1) Damoguaihe and Nantun formation has mud shale features in wide distribution, monolayer thickness and burial depth,organic carbonabundance(TOC), thermal maturity(Ro) satisfy the basic conditions for shale gas accumulation which are most favorable for exploration.