Numerical modelling of seismoelectric signals for offshore exploration

IF 2.1 3区地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY

Journal of Applied Geophysics Pub Date : 2025-09-12 DOI:10.1016/j.jappgeo.2025.105925

Federico Bucher , Fabio I. Zyserman , Leonardo B. Monachesi

{"title":"Numerical modelling of seismoelectric signals for offshore exploration","authors":"Federico Bucher , Fabio I. Zyserman , Leonardo B. Monachesi","doi":"10.1016/j.jappgeo.2025.105925","DOIUrl":null,"url":null,"abstract":"<div><div>By means of a novel numerical procedure based on the finite element method, we study the seismoelectric responses generated in offshore scenarios of interest, such as hydrocarbon or gas hydrate reservoirs beneath the seafloor. Our proposal is capable of dealing with non-horizontal sea bottom geometries and arbitrary distributions of fluids and fluid-saturated porous media. Considering point sources in the water, we study various geological settings by modifying the geometries of the involved interfaces, the source central frequency and the pore-fluid and solid mechanical and electrical properties. Employing realistic acoustic source amplitudes, our results show that seismically-induced electromagnetic signals can be measured by receivers located in seawater with amplitudes detectable by the technologies currently available. Furthermore, our findings highlight that seismoeletric signals display a detectable sensitivity to hydrocarbon reservoirs and gas hydrates beneath the seafloor, also addressing the impact of different seabed topographies.</div></div>","PeriodicalId":54882,"journal":{"name":"Journal of Applied Geophysics","volume":"243 ","pages":"Article 105925"},"PeriodicalIF":2.1000,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Applied Geophysics","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0926985125003064","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

By means of a novel numerical procedure based on the finite element method, we study the seismoelectric responses generated in offshore scenarios of interest, such as hydrocarbon or gas hydrate reservoirs beneath the seafloor. Our proposal is capable of dealing with non-horizontal sea bottom geometries and arbitrary distributions of fluids and fluid-saturated porous media. Considering point sources in the water, we study various geological settings by modifying the geometries of the involved interfaces, the source central frequency and the pore-fluid and solid mechanical and electrical properties. Employing realistic acoustic source amplitudes, our results show that seismically-induced electromagnetic signals can be measured by receivers located in seawater with amplitudes detectable by the technologies currently available. Furthermore, our findings highlight that seismoeletric signals display a detectable sensitivity to hydrocarbon reservoirs and gas hydrates beneath the seafloor, also addressing the impact of different seabed topographies.

查看原文本刊更多论文

海上勘探地震电信号的数值模拟

通过基于有限元方法的一种新的数值计算方法，我们研究了在海底碳氢化合物或天然气水合物储层等感兴趣的海上场景中产生的震电响应。我们的建议能够处理非水平海底几何形状和流体和流体饱和多孔介质的任意分布。考虑到水中的点源，我们通过修改涉及界面的几何形状、源中心频率以及孔隙流体和固体力学和电学性质来研究各种地质环境。利用真实的声源振幅，我们的研究结果表明，地震诱发的电磁信号可以通过位于海水中的接收器测量，其振幅可以通过现有技术检测到。此外，我们的研究结果强调，地震电信号对海底下的油气储层和天然气水合物显示出可探测的敏感性，同时也解决了不同海底地形的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Applied Geophysics 地学-地球科学综合

CiteScore

3.60

自引率

10.00%

发文量

274

审稿时长

4 months

期刊介绍： The Journal of Applied Geophysics with its key objective of responding to pertinent and timely needs, places particular emphasis on methodological developments and innovative applications of geophysical techniques for addressing environmental, engineering, and hydrological problems. Related topical research in exploration geophysics and in soil and rock physics is also covered by the Journal of Applied Geophysics.