基于三维模拟的海洋CSEM资料处理

Data processing of marine CSEM based on 3D modeling

海洋可控源电磁法已经成为海洋油气勘探一个重要工具,但是其资料处理和解释还处于定性和一维模拟阶段.在积分方程三维模拟的基础上对Troll油田实测数据进行了处理,采用人机交互三维模拟寻找背景模型和异常体初始模型,最后对异常体电阻率采用准线性近似快速反演,取得了定量的结果.同时,说明对于二维测线和二维模型依然可以用三维来模拟,其结果优于二维反演.在电子计算机技术快速发展的今天,可以预计三维反演将成为资料处理解释的主流.

Marine CSEM has become a new tool for offshore exploration, however the processing and interpretation of actual data still stay in the stage of qualitative analysis and 1D modeling, and 2D and 3D modeling are in the period of model research. A new processing method for Marine CSEM was developed based on 3D modeling to process the Troll field data. Although there is only one survey line and only 2D model can be modified, there is no influence to the application of 3D inversion software and effect. Fast 3D modeling establishes a base for interactive processing. It might have better justifiability, higher speed and better result than single 2D inversion.