DOI: 10.36347/sjet

Pages: 637-639

Fault deformation mechanism and internal structure of fault zone are the basis of fault sealing and fluid migration along the fault zone. The inner structure and the controlling effect of the internal structure and the control of the oil and gas are studied. Pure sandstone in the formation of the non-consolidation, semi-solid rock, the deformation mechanism of the particle boundary sliding, resulting in the particle rotation and rolling, that is, particle flow. During the consolidation stage (porosity is more than 15%), the deformation mechanism is fractured, and the fault rock is the fractured rock, and the microstructure of the formation is fractured zone. During the consolidation stage (less than 15%), the deformation mechanism is mainly characterized by rupture, the fault core is the fault zone, and the associated micro structure type is fracture. The displacement pressure of fault rocks is related to the depth of the fault, the mud content of the fault rocks and the extent of the fault rocks. At last, the paper puts forward the model of controlling hydrocarbon in the fractured zone of sand and mud interbed formation.