Fault seal ability research and development countermeasures in low permeability sandstone reservoir

For low permeability fault block oil and gas field,the fault sealing is one of the important factors which influence the development effect.The seal ability of gas field has a special significance in making development & adjustment countermeasures.Aimed at the fault block sandstone gas field——WZ gas field in eastern our country,this paper carried out the fault sealing research of this low permeability gas field.By using the method of the lithology configuration relations and dynamic analysis,this paper discussed the fault sealing of the different level faults in WZ gas field.Studies suggested that the block faults are typical closed faults,and the small faults in main block perform poorly sealing.The degree of small faults seal ability depends on both lithology configuration and fluid relation of the two sides of the faults.According to the results,this paper puts forward the development adjustment countermeasures for WZ gas field,and provides the basis for the development and adjustment in WZ gas field.