The Architecture Research Of The Channel Sand In The Horizontal Well Of The Long10Area

The development degree of oilfield blocks long10of Chaoyanggou oilfield is toohigh，it has come into the high water-cut stage of development. the subject of oil fielddevelopment is tapping the remaining oil and enhancing oil recovery. Master the internalarchitecture of single sand body and its influence on heterogeneity, we can study thedistribution laws of the remaining oil better and provide scientific and rational theory forsearching and tapping the residual oil.Taking sequence stratigraphy and theory of sedimentology as guidance, this study usesdetailed well core, well drilling, and well logging data, etc to fine contrast the oilfieldblocks long10Fuyu oil layer, established the uniform and fine stratigraphic framework.With use of principles of sedimentology, through the analysis of the study area geologicalbackground、the single-well facies in a cored well, the depositional system of Fuyu oilreservoir in the study area is further divided: delta distributary plain subfacies and deltafront subfacies, its microfacies types and the logging microfacies model is established,about20time unit microfacies maps are deliberately depicted, then it is analyzed anddescribed. Because the anatomy of the sedimentary microfacies can not meet the needs ofthe fine geologic study,it needs further analyse architecture of river single sand body,inorder to guide the releasing remaining oil in high water-cut stage. The point bars andabandoned channel are fine identificated and analysed, confirming the parameters of thebuilding structure, so that to establish the building structure model in the study area.Focusing on the lateral accretion bodies in the point bars how to influence heterogeneity,establishing the model of three-dimensional porosity within point bar sand body、permeability, and then reflect the spatial pattern of internal porosity of point bar sand body、permeability. The study provides a new theoretical guidance for better tapping remaining oiland for producing point bar sand.