胶莱盆地陆相页岩气成藏地质条件

Geologic Conditions of Continental Shale Gas Accumulation in Jiaolai Basin

结合大量的野外地质调查,运用岩石热解、X射线衍射、压汞、等温吸附等实验方法,以胶莱盆地水南组暗色泥页岩为研究对象,分析了陆相页岩气的成藏地质条件。研究表明:白垩系水南组为以灰黑、灰绿色泥页岩、粉砂岩为主的湖湘沉积,暗色泥页岩厚20.1~266 m,TOC=0.15%~4.0%,平均0.96%。干酪根类型以II型为主,Ro=0.6%~1.2%。研究成果对于认识陆相页岩气成藏基础地质条件,部署进一步地质工作有重要的指导意义。

Combining with a large number of field geological investigations,using the methods of rock pyrolysis,X ray diffraction,mercury intrusion and isothermal adsorption,taking the dark shale of Shuinan formation in Jiaolai basin as the object,studies geologic conditions of continental shale gas accumulation.The results show that Shuinan formation is lacustrine facies deposits and the rocks are mainly composed of grey black and celadon mud shale and siltstone.Dark shale thickness is from 20.1 to 266 meters,and TOC is from 0.15%to 4.0%with an average of 0.96%.The kerogen type is mainly II type and Ro values vary between 0.6%and 1.2%.The research results have important guiding significance for understanding the geological conditions of continental shale gas and the deployment of further geological work.