Abstract:

The progradation,retrogradation,aggradation and their superimposition patterns are the main evidence for sequence classification of fault depressed lake basin The changes in base level caused by episodic subsidence is the basic cause in controlling the developmnent and property of sequences,the source supplementation and climate changes is the external condition of the sequences According to the mentioned above,the reservoirs of 2-3rd submembers of the third member of the Shahejie Formation in Gaoshangpu Oilfields could be divided into 9 subsequence groups and several subsequences This could considerably improve the accuracy of stratigraphic classification and correlation