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地层压力预测技术及其在准中董2井北三维区的应用Formation Pressure Prediction Technology and Its Application in 3D Area of Northern Block Well Dong 2, Central Junggar Basin
王树华, 张建华, 钱焕菊
准中, 压力预测, Eaton法, 异常高压, 叠加速度Central Junggar Basin, Formation Pressure Prediction, Eaton Method, Abnormal Overpressure, Stacking Velocity
《Advances in Geosciences》, Vol.5 No.6, 2015-12-28
The formation pressure is mostly predicted by the interval velocity. In 3D area of Northern Block Well Dong 2, central Junggar Basin, the original interval velocity field was established by the stack-ing velocity data through Dix formula, and then corrected the original interval velocity field by using sonic logging velocity, the more accurate interval velocity field was obtained. The 3D formation pressure of work area was predicted by using the Eaton method, the prediction result indicated that the top interface of abnormal overpressure in study area was basically located at the bottom interface of Toutunhe Formation, the pressures of Toutunhe Formation and its overlying layers were normal, only part of Toutunhe Formation developed the abnormal overpressure, Xishanyao Formation, Sangonghe Formation and Badaowan Formation were abnormal overpressure intervals. The final pressure prediction result was reasonable after it was analyzed by logging pressure detecting, measured formation pressure and the geological characteristics of the study area.