海陆过渡相泥页岩可压地质特征研究—临兴中区石炭-二叠系泥页岩为例

Study on the Compressible Geological Characteristics of Marine Land Transitional Facies Mud Shale——Taking the Carboniferous-permian Mud Shale in the Linxing Central Area as an Example

海陆过渡相泥页岩可压性是制约页岩气开发的重要因素。以临兴区块为例,综合分析岩性、孔裂隙、矿物含量及脆性指数等可压地质参数,探讨了石炭-二叠系海陆过渡相页岩层系可压潜力。结果表明:海陆过渡相泥页岩层段岩性多样,孔裂隙相对发育;脆性矿物以石英为主,脆性指数介于中等-强,具有可压潜力。

The compressibility of marine land transitional facies mud shale is an important factor restricting the development of shale gas.Taking the Linxing block as an example,the compressible geological parameters such as lithology,pore fissures,mineral content,and brittleness index are comprehensively analyzed to explore the compressible potential of the carboniferous-permian marine land transitional facies shale rock layer series.The results show that the lithology of the mud shale layer section in the marine land transitional facies is diverse,and the pores and fissures are relatively developed;The brittle minerals are mainly quartz,with a brittleness index ranging from medium to strong,and have compressible potential.