Stratigraphic Sequence Framework of Zao IV Group in Zaobei Oilfield

Abstract

The geological structures of Zaobei area are broken seriously, because of the whole region was divided many blocks by many faults, which could bring huge difficulty to stratigraphic correlation. The high resolution sequence stratigraphy on Zao IV group in Zaobei oilfield was studied by using core data, logging and 3D seismic data. Features of sequence boundary in all available data were identified, and the characteristics of different levels of cycles were analyzed. Zao IV group in target zone was divided into one long-term base-level cycles, seven mid-term base-level cycles and twenty one short-term base-level cycles Based on the integrated research of core data description in single well logging data Correlation in wells and large scale horizontal Correlation Constrained by 3D scismic data, the high resolution sequence frame of Zao IV group is established, it provides important basis for future reservoir prediction and description.