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受控源电磁学为CCS应用带来希望

本研究评估了碳捕获和储存背景下被动和主动电磁技术的优势、限制和必要的增强。

图 1——EM 系统组件，显示数据记录器、电极、感应线圈和网络接入盒。
图 1——EM 系统组件，显示数据记录器、电极、感应线圈和网络接入盒。
来源：SPE 225486。

在北达科他州开展了一项采用可控源电磁 (CSEM) 方法的电磁(EM) 地球物理勘测，以评估其监测地下二氧化碳流体羽流的可行性。本研究评估了被动和主动电磁技术在碳捕获与封存(CCS)领域的优势、局限性以及必要的改进措施。成功实现了地表对数尺度分辨率，证明了该方法能够高精度地描绘流体羽流边界并估算流体体积。

CSEM 背景

CSEM 方法因其能够探测与地下流体运动相关的细微电阻率差异的能力而日益受到认可。准确高效地监测二氧化碳注入羽流对于确保 CCS 项目的运营完整性、安全性和环境合规性尤为重要。然而，由于地面电磁法固有的分辨率限制，需要整合补充钻孔测井数据才能进行准确解释。

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Decarbonization

Controlled-Source Electromagnetics Provide Promise for CCS Applications

This study assesses the advantages, constraints, and necessary enhancements of both passive and active electromagnetic techniques in the context of carbon capture and storage.

Fig. 1—Components of EM system showing data logger, electrodes, induction coils, and web access box.
Fig. 1—Components of EM system showing data logger, electrodes, induction coils, and web access box.
Source: SPE 225486.

An electromagnetic (EM) geophysical survey using controlled-source electromagnetic (CSEM) methods was conducted in North Dakota to evaluate its feasibility for monitoring subsurface CO2 fluid plumes. This study assesses the advantages, constraints, and necessary enhancements of both passive and active EM techniques in the context of carbon capture and storage (CCS). Surface log-scale resolution was successfully achieved, demonstrating the method’s capability to delineate fluid-plume boundaries and estimate fluid volumes with high accuracy.

CSEM Background

CSEM methods are increasingly recognized for their ability to detect subtle electrical resistivity contrasts associated with subsurface fluid movements. Accurate and efficient monitoring of CO2 injection plumes is particularly crucial for ensuring operational integrity, safety, and environmental compliance in CCS projects. Inherent resolution limitations of surface-based EM methods, however, necessitate integrating supplemental borehole log data for accurate interpretation.

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