Reservoir description technology and selection of roll exploration objects in the east-south of Dongxin Oilfield

The technologies of stratum division and correlation using high resolution sequence stratigraphy,the structure interpretation of full three-dimensional seismic data,the acoustic impedance inversion with log and seismic data and prediction of oil and gas with seismic data were comprehensively applied to re-establish the geological model for the east-southern reservoir in Dongxin Oilfield.The laws of reservoir generation were analyzed,and seven roll exploration objects were proposed.These objects can be divided into two types of structural oil pools and lithologic oil reservoirs including seven objects of roll exploration.The first type is the deeper reservoir under the midst of third section in the Shahejie Formation,and the second type is the lithologic pinchout oil reservoir on the background of micro structure and slope.The types of sand body in the studied area include the delta front sheet sand and the deeper water turbidite(haclberry)sand.The former is located between the upper third section in Shahejie Formation and the lower second section in Shahejie Formation.The latter is between the fourth section in Shahejie Formation and the midst of the third section of Shahejie Formation.