非均质混合硅-塑料-碳酸盐体系对CO2地质封存的影响

IF 1.9 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY
Azadeh Pourmalek, A. Newell, S. Shariatipour, A. Wood
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引用次数: 5

摘要

本研究选择了三个不同的露头,每个露头都代表了一个具有不同异质性的浅海系统,该系统由硅碎屑-碳酸盐混合提供,可能形成小型或大型地层圈闭。这些类型的混合相对CO2储存的影响相对而言知之甚少。这项研究证明了这些系统对安全的二氧化碳地质储存的重要性,因为地层圈闭可能是许多未来储存地点的重要特征。三个3D模型基于:(1)Grayburg组(美国),其显示了与硅碎屑-碳酸盐沉积物混合物变化相关的空间渗透率;(2) Lorca盆地露头(西班牙),表明碎屑相和碳酸盐相的交错;以及(3)Bridport Sand Formation露头(英国),它是层状储层的一个例子,具有薄的碳酸盐胶结层。这项研究表明,相的相互作用和相关的沉积物非均质性对流体流动、储存能力和安全性有不同的影响。Grayburg组的储层安全性和储层容量不受非均质性的单独控制,主要受各相渗透率(即渗透率对比度)、非均质性程度和系统相对渗透率特征的影响。在洛尔卡盆地的情况下,碳酸盐和碎屑相的交错作用提高了储层的安全性,无论其渗透率如何。对于布里德波特砂组,扩展的胶结碳酸盐岩片的存在有助于储存安全性,但没有储存能力,这取决于片的连续性。这些混合系统尤其能最大限度地减少作用在顶部密封件上的大浮力,并减少储存安全性对上覆盖岩的依赖。它们还增加了注入的CO2和盐水之间的接触面积,从而促进了CO2的溶解过程。总体而言,具有混合碳酸盐-硅化碎屑相的储层系统有助于提高CO2的安全有效储存。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。
The impact of heterogeneous mixed siliciclastic–carbonate systems on CO2 geological storage
Three different outcrops are selected in this study, each representing a shallow-marine system with varying heterogeneity provided by siliciclastic–carbonate mixing that may form a small or large stratigraphic trap. The impact of these styles of mixed facies on CO2 storage is relatively poorly known. This study demonstrates the significance of these systems for safe CO2 geological storage, as stratigraphic traps are likely to be a significant feature of many future storage sites. The three 3D models are based on: (1) the Grayburg Formation (USA), which displays spatial permeability linked to variations in the mixture of siliciclastic–carbonate sediments; (2) the Lorca Basin outcrop (Spain), which demonstrates the interfingering of clastic and carbonate facies; and (3) the Bridport Sand Formation outcrop (UK), which is an example of a layered reservoir and has thin carbonate-cemented horizons. This study demonstrates that facies interplay and associated sediment heterogeneity have a varying effect on fluid flow, storage capacity and security. In the Grayburg Formation, storage security and capacity are not controlled by heterogeneity alone but are influenced mainly by the permeability of each facies (i.e. permeability contrast), the degree of heterogeneity and the relative permeability characteristic of the system. In the case of the Lorca Basin, heterogeneity through interfingering of the carbonate and clastic facies improved the storage security regardless of their permeability. For the Bridport Sand Formation, the existence of extended sheets of cemented carbonate contributed to storage security but not storage capacity, which depends on the continuity of the sheets. These mixed systems especially minimize the large buoyancy forces that act on the top seal and reduce the reliance of the storage security on the overlying cap rock. They also increase the contact area between the injected CO2 and brine, thereby promoting the CO2 dissolution processes. Overall, reservoir systems with mixed carbonate–siliciclastic facies contribute to improving the safe and effective storage of CO2. 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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