Abstract:

According to the systematic seismic interpretation, three strata had developed during the faultdepression stage in the Songliao Basin. The developing processes and the original and present distributions of these three strata are very different. During the faultdepression stage, a complete forming process of a basin had happened, not only including the initial splitting phase—The Huoshiling Stage, and the dominating splitting phase—The Shahezi Stage, but also including the fading phase—The Yingcheng Stage. The systematic research on the strata during the faultdepression stage has led to the more accurate forecasting for the source rock, and is of great significance for the deep petroleum exploration.

Key words:

Songliao Basin; faultdepression stage; structural evolutional phase; petroleum exploration