Lacustrine Petroleum Generation and Its Implications in the Qingshankou Shale Oil Exploration, Northern Songliao Basin

As the most proliferous source rock of the Songliao Basin, the Qingshankou formation lacustrine shale has played a key role in the forming of Daqing oilfield, of which after 60 years of mass exploitation, the conventional petroleum resources start to decline gradually. Therefore in recent years, the possibility of exploiting shale oil from the shale has intrigued more and more geologists and geochemists. It is estimated by statistics that the shale oil resources in the Qingshankou 1 member of northern Songliao Basin is about 78 Gbbl, nearly as more as its conventional oil resources (Liu et al, 2014). In order to better understand shale oil formation and occurrence, previously established petroleum generation profile needs to be reviewed, especially when it is based on traditional programmed pyrolysis, in which the overlap of pyrolysis S1 to S2 has complicated our understanding of shale oil formation (King et al., 2005).