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近年来松辽盆地外围油气勘探-基础地质调查表明,大兴安岭地区上二叠统林西组发育有厚层的暗色泥岩,为重要的潜在生烃层系之一.林西组在陶海营子地区出露广泛.本次研究采集了该区露头和钻井中的暗色泥岩样品.通过镜质体反射率(Ro)、伊利石结晶度(KI指数法),对本区林西组暗色泥岩的有机质热演化程度进行了详细的研究,认为本地区林西组烃源岩演化处于高—过成熟演化阶段,未进入变质阶段,具有较好的页岩气勘探前景.
In recent years, oil and gas exploration in the periphery of the Songliao Basin - basic geological survey shows that there is a thick layer of dark mudstone in the upper Permian Linxi Formation in the Greater Xing’an Mountains, which is one of the important potential hydrocarbon generation strata. This study collected samples of dark mudstones in outcrops and drilling wells in this area. Through the vitrinite reflectance (Ro) and illite crystallinity (KI index method), the organic matter The degree of thermal evolution is studied in detail. It is considered that the evolution of source rocks in the Linxi Formation in this area is in the stage of high-over-maturity evolution and has not entered the metamorphism stage and has good prospect of shale gas exploration.