吉林大学学报(地球科学版) ›› 2019, Vol. 49 ›› Issue (2): 578-590.doi: 10.13278/j.cnki.jjuese.20180009
张文强, 殷长春, 刘云鹤, 张博, 任秀艳
Zhang Wenqiang, Yin Changchun, Liu Yunhe, Zhang Bo, Ren Xiuyan
摘要： 海洋可控源电磁法近年来被广泛应用于海洋油气勘探之中，凭借对高阻含油储层的有效识别大大降低干井率，节约钻探成本。受沉积环境的影响，海底地层常常表现出宏观各向异性，而对海洋各向异性模拟算法进行研究可以更有效地进行海洋电磁数据解释。本文从频率域麦克斯韦方程出发，基于标量势分解理论，通过标量势函数与场的连续性条件，在波数域中将电磁场分别向海底深部和海水中延拓，并在海底耦合到发射源上完成电磁场的求解，进而利用汉克尔变换得到了空间域电磁场。通过对海底介质一维各向异性模型电磁响应特征的分析研究发现，覆盖层各向异性对电磁响应有明显的影响；然而，海底高阻层仅垂向电阻率和厚度对海洋电磁响应产生明显影响。通过极性图的方式可以对海底介质各向异性特征进行有效识别。
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