Study on the Fault Sealing Properties in Gaoyou Sag

The fault sealing property was studied systematically from the aspect of fault sorting. The faults were sorted based on the fault scales and the period of the fault activities. The fault sealing characters and laws of the different sorts were studied according to the statistical analysis of the traps and the fault factors including reservoirs and typical non-reservoir accumulation in Gaoyou Sag. The characteristics and law of faults were studied. The analysis shows that fault grade and the lithological juxtapositions are the major fault sealing controlling factors in Gaoyou Sag,the fault activity period and the hade are also the important influencing factors. Based on the above characters,three types of fault sealing mechanism and four patterns of the fault sealing are summarized.