瞬变电磁法油藏动态监测模拟

Modeling of reservoir dynamic performance by TEM method

中国石油天然气集团公司物探重点实验室江汉石油学院研究室,湖北荆州 434023

Department of Geophysics, Jianghan Petroleum University, Jingzhou 434023, China

用基于张量格林函数的体积分方程法对层状地层中一个油藏的动态变化过程进行了瞬变电磁响应的正演模拟。首先在频率域内计算电磁场分量的频率域响应,然后和用快速数字滤波技术将计算结果转换到时间域。模型计算结果表明,当油层厚度逐渐变薄时,在电场和磁场二次场分量的图形上可以得到清晰的反映,这表明用瞬变电磁法对油藏进行动态监测是可行的。

The volume integral equation method based on tensor Green's function is used to modeling the transient electromagnetic responses from a reservoir in a layered formation. Different electromagnetic components are firstly calculated in frequency domain and then converted into time domain. Model experiments show that electric field and the components of magnetic field change significantly when oil layers become thinner.