3D Geological Modeling Of Main Producing Formations Of Yaoxi Oilfield

At present, most domestic oil fields have already stepped into middle-late stage of exploitation, and during this period, water content is very high. In order to make clear the distribution of the remaining oil, enhance oil recovery, and further reveal the distribution characterization and regulation of the reservoir, it is necessary to build refined and high-predictable geologic model. The3D geologic model can reveal the distribution characterization of the reservoir accurately, and give some important clues of the heterogeneity quantitatively, which is the basis of the reservoir volumetric.Reservoir description is a comprehensive evaluation technique of Oil and Gas reservoir, which has been developing with computer technology recent decades. The use of reservoir description is adopted during every phase, such as exploration, exploitation and comprehensive assessment.3D geologic modeling is a key technique of reservoir description. This paper mainly describes the3D geologic modeling procedure on the main oil layers of Yao YingTai oil field. So this paper also makes a brief introduction to the methods of geologic model building except the works conducted in early stage. Recent years, the use of3D geologic modeling is very wide during the exploration and exploitation stage of oil field, which can make clear not only the distribution size and mode of reservoir but also the controlling factors. So it is important to build3D geologic model whose basic cell is small and accuracy is high especially in the late stage of exploitation of oil field.This paper takes the main production layers, namely QingYi â…¡ and QingEr IV of YaoXi oilfield as the study objective. Based on the study of refined sequence correlation and sedimentary micro-facies, firstly, the author utilizes the structure maps of the top of QingYi â…¡&QingEr IV, and fault polygons to build structure model, then adopts the Sequential Gaussian simulation algorithm to build property models constrained by depositional facies as well as lithological facies. The geologic reserve was re-calculated on the base of the geologic model at the end, which provided basic data for the numerical simulation, and the guidance for the further exploitation..