The Research Of Reservoir Forcasting And Reservoir Forming Regular Pattern Of Chengdao Eastern Slope

Through the reservoir prediction and evaluation after a fine structural interpretation and reservoir prediction technology, the breakthrough realized on the geological knowledge, and the Dongying formation and the Shahejie formation of the paleogene are the favorable oil-bearing members for exploration. This scientific research task was set up to carry further out the distributing rule of the reservoir and the hydrocarbon bearing characteristics, and guide the further exploratory direction.Base on the stratigraphic division of the Chengdao Oilfield, the logging and 3d seismic data were used to study the well completion and drilling. The project of stratigraphy division of chengdao eastern slope was set up. And the fine sand group correlation framework of the reservoir interval was founded. This paper also gave a detailed discussion to the plane distribution features of the reservoir thickness, sedimentary facies and micro facies features, substance characteristic and the plane distribution features of the reservoir porosity. The mail targets, the lower boundary of the Guantao Formation, Ed5 of the Dongying Formation and the lower boundary of the Shahejie Formation, were given a fine structural interpretation, and its horizon interpretation and closure became more reasonable. The seismic data was given logging constrained seismic conversion processing by the Jason, which is the advanced inversion software. Based on these inversion data, the spatial distribution and substance characteristic of the Dongying Formation were fine described. And the top surface structural map and the thickness map were made up.The reservoir-forming rule was analyzed. On the base of processing the sbsorptance coefficients and seismic attribute analysis, the main oil-bearing sand bodies were given systematic description and evaluation. The oil-bearing area of the Dongying Formation and the Shahejie Formation was about 26.3Km~2. the petroleum geological reserves was 3840×10~4t. study the hydrocarbon accumulation rules. Based on the analysis of reservoir types and reservoir controlling factors, the research concludes four accumulation patterns: lithology pinchout type, unconformity-screened type, overlap pinchout type, and lithology-structure type.