SEQUENCE SRATIGRAPHY RESEARCH ON THE OULITUOZI AREA OF LIAOHE BASIN

Sequence is a set of contributing connection stratigraphic units that boundaries of tops and bottoms are unconformity or corresponding conformity. The concept is used in the continental basin in the context. Through seismic, logging facies identification and core observation, a regional unconformity, a unconformity of the basin and four partial unconformities of the aim beds are recognized. Based on this, the boundaries of huge, super sequences, sequences and system tracts are divided. This paper describes that the sequence stratigraphic framework concludes a huge sequence and two super sequences in the area and four sequences in the Paleocene Dongying Formation and Shahejie Formation. This is of great importance to the recognition of oil and gas distribution and the association of source rock, reservoir rock and cap rock.