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讨论了利用测井声波时差和地震层速度预测地层压力的方法及其应用。在单井压力预测的基础上,以测井资料作为约束条件,用地震层速度预测地层压力。采用惩罚函数法将约束最优化问题转化为无约束最优化问题,再用阻尼最小二乘法求解。离井近的地方约束程度大,离井远的地方约束程度小,使反演结果在保持总体趋势不变的情况下,与测井资料一致。运用上述方法处理了东营凹陷的实际资料,取得了较好的地质效果。
The method and its application of predicting formation pressure using logging acoustic wave velocity difference and seismic velocity are discussed. On the basis of single well pressure prediction, logging data is taken as a constraint to predict formation pressure with seismic velocity. Using the penalty function method, the constrained optimization problem is transformed into an unconstrained optimization problem, and then solved by damping least square method. The place close to the well has a high degree of constraint and a small restriction from the well, making the inversion result consistent with the well logging data while keeping the overall trend unchanged. Using the above method to deal with the actual data of Dongying depression, and achieved good geological results.