Method of integrated studies for low permeability reservoir and its application

The exploration and development of oil reservoir are getting more difficult today,and the traditional methods of exploration and development can't meet the progressively complicated conditions.The Chang 6~(3) Member of Yanchang Formation,Ordos Basin is a typical continental reservoir,with the features of high heterogeneity,low porosity and permeability,and low abundance.With the ideas of integrated reservoir studies,i.e.reservoir description and reservoir numerical simulation techniques,the paper tries to study the Chang 6~(3)Member with dynamic and statistical information.First,the refined 3-D visual reservoir characteristics of the target layer were established by using the method of three-stage stochastic modeling.The reservoir numerical simulation model was developed from the refined 3-D geologic reservoir model by using the grids upscaling technology.The most reasonable oil reservoir model was achieved on the basis of the techniques of history matching and parameters adjustment.The practical production results indicate that the technology of integrated reservoir studies with reservoir description and numerical simulation can better resolve the complicated problems of oil reservoir.