Reservoir Geological Modeling Of Chang 2 Group Of Yanchang Formation In 152 Area In Aa'sai Oilfield

Since 80s, three-dimensional visualization of geological modeling technology is a new technology, with the development of computer technology. It is a integrative skill,which include the geological statistics and computer technology, especially 3D graphics visualization technologies.And it can quantify the the heterogeneity reservoir through the establishment of oil reservoirs in structural models, sedimentary facies model, reservoir properties and physical properties.There are now some problems in Chang 2-the key oil-bearing formation of 152 region of An'sai oilfield, Ordos Basin. Such as production pressure is difficult to determine a reasonable (high fluid volume, high water content, high surface), water injection profile uneven, water flooding low efficiency, static pressure and moisture content increased, decreased productivity. Therefore, detailed description of a long two reservoirs, the establishment of quantitative three-dimensional geological model to predict reservoir heterogeneity and distribution of remaining oil around the oil field development has become a key issue.The paper has been constructed isochronal genetic stratigraphic framework of Chang 2 oil-bearing formation using higher resolution sequence stratigraphy, analyzed logging facies combining, studied on plane distribution and study the various small layer (Chang 211, Chang 212, Chang 213, Chang 221, Chang 222-2, Chang 222-2 and Chang 23) sedimentary micro facies of Chang 2 oil-bearing formation of Yanchang formation in 152 region of An'sai oilfield, Ordos Basin. The physical properties lower limit has been established by secondary interpretation of logging curve according to development dynamic information. In the study of the reservoir rock characteristics, heterogeneity and pore structure characteristics, such as based on the description of reservoir properties and oil and so the distribution characteristics of the reservoir control factors. Geological knowledge database of different types abundant geological variables has been constructed combining with multi subjects, on which based the author constructed there dimensional geological model of sedimentary micro facies, framework of sand body, porosity, permeability and Oil saturation of Chang 2 oil-bearing formation of Yanchang formation of 152 region of An'sai oilfield. Reservoir geological model can not only profoundly petrophysical properties, spatial heterogeneity, and reservoir numerical simulation for the motion law of oil and water laid an important foundation.