Sedimentary Microfacies And Phase-controlled Geological Modeling Of The Ming IV-8 Small Layer Of The Wuduan Block In The Second District Of Gangdong

The fifth block in the second district of eastern Dagang Oilfield, located in the middle of the development zone of eastern Dagang, is an important development zone of Dagang Oilfield, and Ming ?-8 sublayer is one of the main productive formations. After four decades of production, it has reached the last stage of development, with prominent characteristics of high water content and abundant production. To further improve the recovery rate and achieve the scientific development of Dagang oilfield, with the available information and data, the plane distribution of sediment microfacies of meandering river and three-dimensional property parameters should be studied.The former studies and information have been extensively collected in this paper, and through systematic analysis of the drilling core, logging, seismic and testing of dynamic production data of the fifth block in the the second district of eastern Dagang Oilfield, thorough research of the sedimentary characteristics of meandering river, and then under the guidance of sedimentology, reservoir geology, petroleum geology,oilfield development geology and other theories, sublayers of the target layer have been divided and compared, and the sedimentary microfacies of meandering river have also been divided. Combined with sedimentary facies analysis of single well and contrast of cross-sectional sedimentary microfacies, the meandering river channel and its sedimentary evolution characteristics have been fully studied.We established the structural framework model of work area, and under the control of sedimentary microfacies, we further portrayed internal reservoir physical properties (porosity, permeability and saturation) and descript their distribution and growth characteristics. We also Precise Characterized the heterogeneity of the reservoir and its internal properties in the three-dimensional space, established phased attribute model (porosity model, permeability model, oil saturation model) of oil segments, and ultimately used a variety of methods for quality inspection of the established model to provide accurate prototype geological model for further numerical reservoir simulation and remaining oil fine description.