Method for identifying fault activity of underground gas storage based on microseism monitoring technology

The invention provides a method for identifying fault activity of an underground gas storage based on a microseism monitoring technology. The method comprises the steps of 1) inputting a microseism positioning result and attribute information; 2) dividing micro-seismic events into R clusters according to the aggregation degree of the micro-seismic events in the step 1); 3) according to the clustering condition in the step 2), calculating a b value of each cluster of micro-seismic events; 4) calculating the D value of each cluster of micro-seismic events according to the clustering condition in the step 2); and 5) calculating a fault activity index F according to the b value result in the step 3) and the D value result in the step 4). According to the method, the fault activity indexes of the micro-seismic events of different clusters are calculated by using the attribute information of the micro-seismic events on the basis of the micro-seismic monitoring result, the fault activity in the injection-production