Abstract: By using a method of history-causation analysis and beginning with the regional structure framework,this paper makes a classification of Chenjia reverse fault into four types of faulting systems,recogmizing corresponding four sorts of faulting origins and establishing four kinds of faulting developed models. According to these and the theory of hydrocarbon reservoir formation, the effect of faulting in this area on controlling oil/ gas migration, accumulation and reservoir formation is approached along with the reservoir distribution models. Finally, the mechanisms for eight sorts of petroleum reservoir formation are outlined.

Key words: Liaohe oilfield, Lengjiabao oilfield, Reverse fault, Thrown side, Reservoir formation, Reservoir distribution, Mode