自然和工程CO2储层溶解度捕获的量化

IF 1.9 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY
Rory Leslie, A. Cavanagh, R. Haszeldine, G. Johnson, S. Gilfillan
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引用次数: 9

摘要

地质储层中二氧化碳的安全保留对于有效储存至关重要。溶解性捕获,即CO2溶解到地层水中,是天然CO2储层地质时间尺度上的一个主要汇点。CO2注入期间的观察结果,结合CO2储层的模型,表明溶解性捕获立即开始。在可观察到的几年到几十年的工程时间尺度和>10之间,溶解速率的演变存在不确定性 以天然CO2储层为代表的kyr状态。少数研究限制了天然类似物的溶出速率。研究表明,溶解性捕集是结构捕集之后的主要储存机制,可在整个储层中去除10-50%的CO2。天然类似物、工程油藏和模型研究对CO2的溶解分数和溶解速率进行了广泛的估计。模拟和工程油藏没有显示出在几个模型中看到的溶解CO2的高分数。来自天然类似物的证据支持了一个模型,即在建立稳定的气水接触之前,大多数溶解发生在侵位和迁移过程中。CO2溶解速率随时间的快速下降表明,在CO2停留的大部分时间里,类似储层处于溶解平衡状态。补充材料:方案A和B的所有曲线图和指数函数曲线的溶解速率可在https://doi.org/10.6084/m9.figshare.c.5476199专题收藏:本文是二氧化碳储存地球科学收藏的一部分,可在:https://www.lyellcollection.org/cc/geoscience-for-co2-storage
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Quantification of solubility trapping in natural and engineered CO2 reservoirs
Secure retention of CO2 in geological reservoirs is essential for effective storage. Solubility trapping, the dissolution of CO2 into formation water, is a major sink on geological timescales in natural CO2 reservoirs. Observations during CO2 injection, combined with models of CO2 reservoirs, indicate the immediate onset of solubility trapping. There is uncertainty regarding the evolution of dissolution rates between the observable engineered timescale of years and decades, and the >10 kyr state represented by natural CO2 reservoirs. A small number of studies have constrained dissolution rates within natural analogues. The studies show that solubility trapping is the principal storage mechanism after structural trapping, removing 10–50% of CO2 across whole reservoirs. Natural analogues, engineered reservoirs and model studies produce a wide range of estimates on the fraction of CO2 dissolved and the dissolution rate. Analogue and engineered reservoirs do not show the high fractions of dissolved CO2 seen in several models. Evidence from natural analogues supports a model of most dissolution occurring during emplacement and migration, before the establishment of a stable gas–water contact. A rapid decline in CO2 dissolution rate over time suggests that analogue reservoirs are in dissolution equilibrium for most of the CO2 residence time. Supplementary material: Dissolution rate for all plots and exponential function curves for scenarios A and B are available at https://doi.org/10.6084/m9.figshare.c.5476199 Thematic collection: This article is part of the Geoscience for CO2 storage collection available at: https://www.lyellcollection.org/cc/geoscience-for-co2-storage
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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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