Point Bar Sand Body Internal Fine Geological Modeling And Numerical Simulation Method To Study

The central part of Xing2block at Xing Bei development zone of Daqing oil field has entered into medium-later developing stage with high water cut, so better tapping of remaining oil has become the key point. It is necessary to understand internal architecture characteristic of a point-bar as such to set up a fine geological modeling and then carry out numerical simulation study, which can provide the basis for better study on remaining oil distribution in meandering river sand body.Studies on three-dimensional geological model of internal configuration of a reservoir and intrastratal rnumerical simulation are less. To meet the demand of carrying out numerical simulation by using three-dimensional geological model of actual reservoir and then analyzing remaining oil distribution under the control of internal configuration, the fine geological modeling and numerical simulation studies have been carried out in the point-bar sand body in the central part of Xing2block. Taking the sequence stratigraphy and sedimentology theory as guidance, the P I1-3unit is contrasted finely in the central part of Xing2block by using detailed well cores and well logging data and so on, and then the uniform and fine stratigraphic framework is established. Combining sedimentology theory and extensive literature research and analysis of the target area geological background and the well core data, the target layer is further divided into delta distributary plain subfacies and delta front subfacies, and then its logging microfacies model is established and about6microfacies maps are depicted. Further the internal architecture of P I332is dissected and the parameters of it are determined, meanwhile not only establishing4level interface in order to control internal model of point bar, but also characterizing the spatial distribution of lateral accretion as well as the property changes in the lateral body. In order to reveal the distribution of remaining oil and optimize adjustment and tapping measures, numerical simulation studies of target area have been conducted, which can provide scientific basis for further development of reservoir.