Modification of Tong′s parameter of low permeability reservoir and its application
YANG Yan;Research Institute of Exploration and Development,Jilin Oilfield Company,PetroChina;
The water drive curve is an important method to evaluate the development efficiency, calculate the oil recovery efficiency and predicate the water cut in the water injection field. Academician Tong Xianzhang proposed that the water displaced original oil in place volume is 7.5 times the reciprocal of the slope of Type A water drive curve according to the analysis of many oilfields ′dynamical production data. He also proposed the Tong′s curve method. But for low permeability oil fields those laws aren′t suitable according to the practical applications. According to the research of Type A water drive curve, Type B water drive curve and the Tong′ s curve, we derived and proposed the development efficiency analysis method which is suitable to the low permeability reservoir such as Jilin Oilfield. After studying the relationship of water cut, recovery percent of reserves and recovery factor and studying the relationship of the water displaced original oil in place volume and the slope of the Type A water drive curve, we modified the Tong′s parameter from 7.5 to 13.5 for the low permeability water injecting reservoir comprehensively. Meanwhile, we modified the formulation of the water cut increasing rate and the water storage rate for low permeability reservoir.
【CateGory Index】： TE357.6