An analytic nonlinear model of thermo-poro-elastic pressure transients in porous rocks 2 with application to deep CO2 storage.

IF 1.2 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Annals of Geophysics Pub Date : 2021-11-12 DOI:10.4401/ag-8690

Roman Kanivetsky, Ettore Salusti

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Abstract

• Today a CO2 storage/segregation is an important option for a significant enhancing of CO2 sinks, to reduce the net carbon emissions into our planet atmosphere. Such storage/sequestration is a complex process, dealing with many facets of decision about the site selection, taking into consideration the local geological, geothermal, hydrodynamic and hydrocarbon potentials. In such multifaceted context, a thermo-poro-elastic nonlinear analytic model of fluid pressure P in deep rocks, can play an important role. To tackle this dynamics we here examine a nonlinear model of fluid pressure transient also considering convection, thermal dynamics and fluid/rock "frictions”. In addition, we here show that pressure dynamics, induced by an eventual external time or areal forcing can allow simple analytical determinations of pressure transients in these deep porous media. Such processes indeed can have practical impacts on the CO2 evolution for storage in deep rocks and thus influence the final site choice for a deep CO2 injection. In synthesis, this model provides simple characterizations of thermo-poro-elastic transients for CO2 storage. 24 25 26

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多孔岩石热—孔—弹性压力瞬态的非线性解析模型2及其在CO2深储中的应用。

•今天，二氧化碳储存/隔离是显著增强二氧化碳汇的重要选择，以减少向地球大气中的净碳排放。这种储存/封存是一个复杂的过程，涉及选址决策的许多方面，要考虑到当地的地质、地热、水动力和碳氢化合物潜力。在这种多方面的背景下，深部岩石流体压力P的热孔弹性非线性分析模型可以发挥重要作用。为了解决这个动力学问题，我们在这里考察了流体压力瞬态的非线性模型，同时考虑了对流、热动力学和流体/岩石“摩擦”。此外，我们在这里表明，由最终的外部时间或面强迫引起的压力动态可以允许简单的分析确定这些深层多孔介质中的压力瞬态。这些过程确实会对深层岩石中储存的二氧化碳演化产生实际影响，从而影响深层二氧化碳注入的最终地点选择。综合而言，该模型提供了简单的表征CO2储存的热孔弹性瞬态。24 25 26

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来源期刊

Annals of Geophysics 地学-地球化学与地球物理

CiteScore

2.40

自引率

0.00%

发文量

审稿时长

4-8 weeks

期刊介绍： Annals of Geophysics is an international, peer-reviewed, open-access, online journal. Annals of Geophysics welcomes contributions on primary research on Seismology, Geodesy, Volcanology, Physics and Chemistry of the Earth, Oceanography and Climatology, Geomagnetism and Paleomagnetism, Geodynamics and Tectonophysics, Physics and Chemistry of the Atmosphere. It provides: -Open-access, freely accessible online (authors retain copyright) -Fast publication times -Peer review by expert, practicing researchers -Free of charge publication -Post-publication tools to indicate quality and impact -Worldwide media coverage. Annals of Geophysics is published by Istituto Nazionale di Geofisica e Vulcanologia (INGV), nonprofit public research institution.