Study On Formation Pressure Prediction And Blowout Prevention Technique Of Perforating Wells

After 50 years development, Daqing Oilfield was in the stage of multiple sets of well networks producing jointly, and water and polymer flooding coexisted in the field, which causes complicated formation pressure; and some phenomena, such as, overflow and blowout ofen happen when perforating. To solve the problem, the study on perforating well's formation pressure prediction is carried out. With comprehensive analysis of the origin characteristics of different formation sands and percolation characters, the formation pressure prediction method for ready-for-perforating wells is established using pressure data of neighborin wells; and the calculation method for ready-for-perforating wells is established using SP logging curves and sonic logging curves. The technology of blowout prevention during perforating is improved; wireline conveyed multi-stage controllable perforating technique is studied and developed; and a portable type wireline perforating BOP is developed. The perfect blowout prevention plan is made for perforating; and different blowout prevention techniques are optimized and applied comprehensively, realizing the management at different levels for perforating wells'blowout prevention. A set of formation pressure prediction method and blowout prevention technology applicable to Daqing Oilfied has formed for perforating wells, which has an important meaning to the safe, efficient, and green environmental operation of Daqing Oilfield.