Multiphysics modeling of CO₂ sequestration in a faulted saline formation in Italy

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• 作者：Nicola Castelletto ; Pietro Teatini ; Giuseppe Gambolati ; Dan Bossie-Codreanu ; Olivier Vinck茅 ; Jean-Marc Daniel ; Alfredo Battistelli ; Marica Marcolini ; Federica Donda ; Valentina Volpi
• 关键词：CO2 injection ; Faulted reservoir ; Well and reservoir flow-dynamics ; Geomechanics ; Modeling
• 刊名：Advances in Water Resources
• 出版年：December, 2013
• 年：2013
• 卷：62
• 期：Complete
• 页码：570-587
• 全文大小：5504 K

文摘

The present work describes the results of a modeling study addressing the geological sequestration of carbon dioxide (CO₂) in an offshore multi-compartment reservoir located in Italy. The study is part of a large scale project aimed at implementing carbon capture and storage (CCS) technology in a power plant in Italy within the framework of the European Energy Programme for Recovery (EEPR). The processes modeled include multiphase flow and geomechanical effects occurring in the storage formation and the sealing layers, along with near wellbore effects, fault/thrust reactivation and land surface stability, for a CO₂ injection rate of 1 脳 10⁶ ton/a. Based on an accurate reproduction of the three-dimensional geological setting of the selected structure, two scenarios are discussed depending on a different distribution of the petrophysical properties of the formation used for injection, namely porosity and permeability. The numerical results help clarify the importance of: (i) facies models at the reservoir scale, properly conditioned on wellbore logs, in assessing the CO₂ storage capacity; (ii) coupled wellbore-reservoir flow in allocating injection fluxes among permeable levels; and (iii) geomechanical processes, especially shear failure, in constraining the sustainable pressure buildup of a faulted reservoir.