松辽盆地南部中浅层成藏机制研究

根据最新资料，结合目前的勘探认识，分析松辽盆地南部中浅层的成藏机制。认为虽然松辽盆地南部发育两套烃源岩，但青山口组是主要烃源岩，而且主要在明水组沉积末期生烃，具有突发性；油气初次充注的时期是嫩江组沉积末期，主要充注时期是明水组沉积末期，T2地震反射层的断层多，是青山口组烃源岩生成的油气往扶杨油层，葡萄花油层，萨尔图油层捧运的主要通道和途径。百嫩江组沉岩成岩作用弱，具有一定柔韧性，导致T1地震反射层断裂少，增强了嫩江组封盖能力，这是中部组合油气丰富的重要原因。图4参7

Pool formation mechanism of medium shallow layer in south Songliao Basin

Based on the latest data, combined with the present exploration, some new ideas are raised for the pool formation mechanism of south Songliao Basin. Although two groups of hydrocarbon source rocks are developed in south Songliao Basin, the Qingshankou Group is the main source rock and its abrupt hydrocarbon generation is mainly concentrated in the late of Mingshui Group. The first hydrocarbon filling period is in the late deposition of Nenjiang Group, and the main filling period is in the late deposition of Mingshui Group. Many faults developed in T2 reflection horizon, which are main paths for the vertical migration of hydrocarbon from the source rock of Qingshankou Group up to Fuyang, Putaohua and Saertu Reservoirs. The shale in Nenjiang Group results in few fractures in seismic reflection, improving the enclosing ability of Nenjiang Group, and is a key reason of abundant oil and gas combination in central part.