电法测井三参数反演

THE THREE PARAMETERS INVERSION OF ELECTRICAL LOGGING

首先应用求解偏微分方程反问题的广义脉冲谱技术，将电法测井２个参数的反演推广到３个参数的反演．其次考虑到现在使用的广义脉冲谱反演算法的计算速度较慢，提出了求解电法测井反演问题的离散牛顿法．对这两种方法进行了数值模拟，并作了计算精度、稳定性和工作量的比较，同时还用实际模型和实际测井数据进行检验．结果表明这两种方法可应用于生产实践．

First, the authors have advanced the electrical logging inversion from two parameters to three parameters, using the Generalized Pulse Spectrum Technique for solving the inverse problem of partial differential equation. Second, considering the slower calculating speed of the Generalized Pulse Spectrum inversion algorithm which is being used now, the Discrete Newton method has been proposed to inverse the three parameters. The numerical simulations of the two algorithms have been carried out, and the precision, the steady nature and the calculating capacity have been compared. Further more, practical models and parctical well logging data have been used to test the two algorithms. The methods presented in this paper can be used in the practice of production.