断裂带气体co2注入运移数值模型及工作流程

IF 1.9 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY
V. Romano, S. Bigi, Heeho D. Park, A. Valocchi, J. Hyman, S. Karra, M. Nole, Glenn Hammond, G. Proietti, M. Battaglia
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引用次数: 0

摘要

了解裂缝和断层是否会影响CO 2在覆盖层中的运移,是评价和监测CO 2地质储存点的关键。我们提出了一个数值模型和工作流程来描述位于覆盖层浅部的断层的水力特性。这有助于评估系统在CO 2向地面迁移的情况下的密封潜力,并设计有效的监测计划。该模型配置代表了在相当浅的条件下(50-500 m)在实际地点进行的几次实验。该模型结果应用于亚平宁山脉(意大利)的一个选定的断层露头,表明大部分天然气通过高断层运移,而一些天然气也通过上盘破坏带的断层核心运移。大量的气体随后溶解到水中,这就强调了准确建模以评估二氧化碳泄漏到近地表含水层或地表的危害的重要性。断层核附近压力积聚的出现表明,要预测断裂带的天然气运移路径,需要对运移条件进行详细的建模。专题合集:本文是故障和顶部密封2022合集的一部分,可在https://www.lyellcollection.org/topic/collections/fault-and-top-seals-2022获得
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A numerical model and workflow for gas CO 2 injection and migration in a fault zone
Understanding whether fractures and faults impact the CO 2 migration through the overburden is critical in the evaluation and monitoring of CO 2 geological storage sites. We present a numerical model and workflow to describe the hydraulic behaviour of a fault located in the shallow part of the overburden. This helps to evaluate the sealing potential of the system in case of unwanted CO 2 migration toward the surface and to design an efficient monitoring plan. The model configuration is representative of several experiments performed at real sites under quite shallow conditions (50-500 m). The model results, applied to a selected fault outcropping in the Apennines (Italy), show that most of the gas migrates through the high, while some of the gas also migrates through the fault core in the hanging wall damage zone. A significant amount of gas then dissolves into the water, emphasizing the importance of accurate modelling to assess the hazard of CO 2 leakage into near-surface aquifers or to the surface. The occurrence of pressure buildup close to the fault core points out that detailed modelling of the migration conditions is required to predict gas path through a fault zone. Thematic collection: This article is part of the Fault and top seals 2022 collection available at: https://www.lyellcollection.org/topic/collections/fault-and-top-seals-2022
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来源期刊
Petroleum Geoscience
Petroleum Geoscience 地学-地球科学综合
CiteScore
4.80
自引率
11.80%
发文量
28
审稿时长
>12 weeks
期刊介绍: Petroleum Geoscience is the international journal of geoenergy and applied earth science, and is co-owned by the Geological Society of London and the European Association of Geoscientists and Engineers (EAGE). Petroleum Geoscience transcends disciplinary boundaries and publishes a balanced mix of articles covering exploration, exploitation, appraisal, development and enhancement of sub-surface hydrocarbon resources and carbon repositories. The integration of disciplines in an applied context, whether for fluid production, carbon storage or related geoenergy applications, is a particular strength of the journal. Articles on enhancing exploration efficiency, lowering technological and environmental risk, and improving hydrocarbon recovery communicate the latest developments in sub-surface geoscience to a wide readership. Petroleum Geoscience provides a multidisciplinary forum for those engaged in the science and technology of the rock-related sub-surface disciplines. The journal reaches some 8000 individual subscribers, and a further 1100 institutional subscriptions provide global access to readers including geologists, geophysicists, petroleum and reservoir engineers, petrophysicists and geochemists in both academia and industry. The journal aims to share knowledge of reservoir geoscience and to reflect the international nature of its development.
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