Fault activities have important effects on hydrocarbon migration. The evolution process from microfracture→fracture→fault shows vividly the characteristics of periedic and intendttent pulse under the seismic pumping migration mechanism

which were determined by the periodic seismic activities and intermittent pulse of fracture extension of stress field chang in geological history. The unique venical distribution of the complex fault block oilfields in Dongying Depression is the result of altemation of transfusion during tectonic inactivity and seismic pumping during tectionic activity. This phenomenon is common in big oil-gas fields.