The author made a profound analysis about the so-called Shanbei hydrodynamically trapped oil pool according to the theoretical conditions for the formation and preservation of a hydrodynamic trap and the practical hydrodynamic conditions of Shanbei oil pool,and found that even if the sandstone reservoir beds of Huoshaogou Format.

Comprehensive evaluation procedure of sealing capability of mudstone caprocks in early exploration period in Chengzihe formation of Suibin Depression,Sanjiang Basin;

Gas reservoir in Dongpu depression in the area without halite is buried below 3000m,mainly below 3600m,which is greatly related with mudstone sealing capability changing with depth.