Abstract:

Tahe Oilfield 6-7 area whose recovery is significantly lower than other oilfield at home and abroad, is a fractured-vuggy carbonate reservoir. Based on the actual development situation in 6-7 area, high quality 3D seismic data, rock core, well log data and production data, the controlling factor of the remaining oil distribution could be reduced to 7 kinds of geological factors and 4 kinds of development factors. Combined with reservoir engineering, numerical simulation multidisciplinary approach, a comprehensive study is used in the remaining oil distribution in this process. Top surface form of hammock, the distribution of dense limestone and fracture zone, and geometry types of reservoir control the development of reservoir space and flow channel; Drilling locations, relationship of producing intervals and injectionproduction affect the sweep region of the water in the reservoir. Through the fine description for the geologic and development factors of remaining oil distribution in fracturedvuggy carbonate reservoir, remaining oil distribution models of hammock, dense barrier occlusion, blind cavity oil, attic, bottom water coning, and pore and fracture around high diversion channel were eventually built up, and the authors considered that the remaining oil controlled by the compact segment and low monadnock zone will be the focus tapping areas in the future.