利用差分场增强浅水海域可控源电磁数据的可探测性

IF 0.6 4区地球科学 Q4 GEOCHEMISTRY & GEOPHYSICS Exploration Geophysics Pub Date : 2023-02-21 DOI:10.1080/08123985.2023.2176747

Gang Li, Wen Lei, C. Li, Lin-jiang Qin

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引用次数: 0

摘要

在浅水区，由于电波的影响，频域海洋可控源电磁(CSEM)数据的解释具有挑战性。电波占主导地位，将导致对数据集的误解。提出了一种对浅水海洋CSEM数据进行电波衰减的差分场方法。计算两个连续接收点或源点之间的场差，并采用几何扩频相关系数进行加权。利用差分场增强了有目标和无目标模型之间的场比给出的可探测性，这表明电波的影响被抑制了。

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Enhanced detectability using differential fields for marine controlled-source EM data in shallow waters

ABSTRACT In shallow waters, the interpretation of the frequency-domain marine controlled-source electromagnetic (CSEM) data is challenging due to the airwave. The airwave dominates and will lead to misinterpretation of the data set. A differential-field approach is presented to attenuate the airwave for the shallow-water marine CSEM data. The difference of the fields between two consecutive receivers or source points is calculated and weighted by the geometric spreading related factor. By using differential fields, the detectability given by the field ratio between the models with and without the target is enhanced, which indicates that the impact of airwaves is suppressed.

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来源期刊

Exploration Geophysics 地学-地球化学与地球物理

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Exploration Geophysics is published on behalf of the Australian Society of Exploration Geophysicists (ASEG), Society of Exploration Geophysics of Japan (SEGJ), and Korean Society of Earth and Exploration Geophysicists (KSEG). The journal presents significant case histories, advances in data interpretation, and theoretical developments resulting from original research in exploration and applied geophysics. Papers that may have implications for field practice in Australia, even if they report work from other continents, will be welcome. ´Exploration and applied geophysics´ will be interpreted broadly by the editors, so that geotechnical and environmental studies are by no means precluded. Papers are expected to be of a high standard. Exploration Geophysics uses an international pool of reviewers drawn from industry and academic authorities as selected by the editorial panel. The journal provides a common meeting ground for geophysicists active in either field studies or basic research.