正演模型用来确定电磁测井测量的基本响应，和主要由实验室确定响应的核磁共振测量不同。
Forward modeling is used to determine the general response of most electromagnetic logging measurements, unlike nuclear measurements whose response is determined mainly in laboratory experiments.
为了得到更精确更趋于实际的测井数据，研究套管和水泥环等对井问电磁测井的影响规律具有非常重要的意义。
In order to get more accurate logging data, it is very important to do research on the influence rule of metal casing and cement sheath to cross-well electromagnetic logging.
针对电磁感应测井问题，基于区域分解的原理对体积分方程提出了一种快速有效的数值计算方法。
In modeling the electromagnetic induction, based on the principle of domain decomposition, a fast and effective numerical computational method is developed to deal with the volume integral equation.
应用推荐