Conditions of Hydrocarbon Accumulation of Deep Reservoirs in the North of Shiwu Fault Depression in the South of Songliao Basin

A method of sequence stratigraphic analysis is used to integrally analyze the conditions of hydrocarbon accumulation in the north subtle reservoirs in Shiwu Fault Depression in the South of Songliao Basin. It indicates that the main source area is in the north side, the beneficial reservoirs are mainly distributed in the rupture zones. Especially during the depositional periods of Shahezi Formation and Yingcheng Formation, it is distributed in skirt shape along the rupture trend, the braided river delta in high axis and low fan intruded into the south deep depression shall be the main directions of subtle reservoir formation in Shiwu Fault Depression