朱宇启,裴建新,段双敏,吴志强

• 1:中国海洋大学海洋地球科学学院
• 2:中国海洋大学海底科学与探测技术教育部重点实验室
• 3:青岛海洋科学与技术试点国家实验室海洋矿产资源评价与探测技术功能实验室
• 4:中国地质调查局青岛海洋地质研究所

摘要(Abstract)：

海洋可控源电磁法(Controlled-Source ElectroMagnetic, CSEM)对于油气储藏饱和度判别具有较高的敏感性,这为其用于油气储藏检测奠定了基础。但是海洋CSEM相较于地震勘探而言对异常体的垂向分辨率较低,这为海洋CSEM资料反演异常体垂向结构带来困难。由于测井数据具有垂向分辨率高的特点,蕴含丰富的电阻率和深度等信息,测井信息的引入可在一定程度上改善海洋CSEM资料垂向分辨率低的不足。将测井数据作为先验信息引入目标函数的模型加权矩阵中,引导反演的迭代方向,并根据测井信息对电阻率垂向变化区域进行局部细化,精细刻画细化区域的电阻率变化,进而提高海洋CSEM反演的垂向分辨率,逼近反演的最优解。在南黄海中部隆起区的应用中,对海洋CSEM实测数据进行测井约束反演,其结果表明,测井约束的海洋CSEM反演结果不仅呈现了地电断面的基本结构,而且还能突出垂向发生明显变化的层位,表现出较高的垂向分辨率。

关键词(KeyWords)： 海洋CSEM;测井约束;局部细化;垂向分辨率;南黄海

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上项目(41974085);; 中央高校基本科研业务费专项项目(201964015)资助~~

作者(Author): 朱宇启,裴建新,段双敏,吴志强

DOI: 10.16441/j.cnki.hdxb.20200231

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