Chang 9 layer of Jiyuan oilfield because of the deeply buried,high temperature,development of bottom water and complex oil-water relationship characteristics,stimulation is difficult,the early stimulation for oil layer is relatively thin and has a certain barrier shelter of bottom water reservoir and directly connected with bottom water and thin oil reservoir,poor technical adaptability.According to the geological complexity of Chang 9 layer reservoir,the reservoir is divided into three types,one is bottom water reservoir contains no edge,better properties,the second is the reservoir with bottom water,but has good isolation layer between oil and water layer,the third is bottom water reservoir development,oil and water layer directly connected.According to the characteristics of various types of reservoir on the basis of the reform measures,reconstruction technology optimization and reservoir fracturing fluid system optimization,initially formed Chang 9 layer stimulation model of reservoir,which laid a foundation for effective exploration and development. |