Abstract:Regarding Shuinan formation in Laiyang group in Laiyang basin as the study object, through analyzing lithologic characteristics and sedimentary environment, it is found that Shuinan formation is favorable for the formation of shale gas. The organic carbon contents range from 0.62%～23.00%, the vitrinite reflectance range from 0.62%～2.14%, and the kerogen types are mainly type Ⅰ and type Ⅱ. It is considered that Shuinan formation has the material basis and geological conditions of shale and gas formation. Based on the test data of shale in Shuinan formation, the characteristics of free gas, sorbed gas and dissolved gas in shale have been discussed. The total gas content of shale gas is 1.538m3/t, the free gas content (57%) is the dominant component, and followed by the adsorbed gas content. It is revealled that the shale gas in Shuinan formation in Laiyang basin has a certain exploration potential.
