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Potential of storing gas with high CO2 content in salt caverns built in ultra-deep water in Brazil

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da Costa, Alvaro Maia [1, 2] ; da Costa, Pedro V. M. [2] ; Udebhulu, Okhiria D. [1] ; Azevedo, Ricardo Cabral [1] ; Ebecken, Nelson F. F. [3] ; Miranda, Antonio C. O. [4] ; de Eston, Sergio M. [1] ; de Tomi, Giorgio [1] ; Meneghini, Julio R. [1] ; Nishimoto, Kazuo [1] ; Ruggiere, Felipe [5] ; Malta, Edgard [6] ; Rocha Fernandes, Mauro Elis [1] ; Brandao, Camila [7] ; Breda, Alexandre [7]
Número total de Autores: 15
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Sao Paulo - Brazil
[2] Modecom Technol Geomech & Comp Modeling, Rio De Janeiro - Brazil
[3] Fed Univ Rio de Janeiro COPPE UFRJ, Rio De Janeiro - Brazil
[4] Univ Brasilia UNB, Brasilia, DF - Brazil
[5] Argonautica, Sao Paulo - Brazil
[6] Technomar, Sao Paulo - Brazil
[7] Shell Brazil, Rio De Janeiro - Brazil
Número total de Afiliações: 7
Tipo de documento: Artigo Científico
Fonte: GREENHOUSE GASES-SCIENCE AND TECHNOLOGY; v. 9, n. 1, p. 79-94, FEB 2019.
Citações Web of Science: 1

Salt caverns have been identified as one of the best options for the underground storage of gases due to salt rock's excellent sealing capabilities and interesting mechanical properties, such as self-healing when damaged or cracked. It is feasible to build salt caverns in the Brazilian pre-salt ultra-deep water environment for gas storage. However, the peculiar geology of the Brazilian province considered here is characterized by the stratification of thick layers of halite with intercalations of carnallite and tachyhydrite salt rock, whose creep strain rate is almost two orders of magnitude higher than halite's creep strain rate under the same conditions of temperature and pressure. Computational mechanics is being used for the design of offshore salt caverns opened by dissolution mining for the storage of natural gas. The challenge presented in this paper requires the storage of natural gas with high CO2 content offshore in ultra-deep water (2140 m) in salt caverns. If the economics proves feasible, this offshore gas storage station will be the first of its kind in the world. A technical feasibility rock mechanics study of giant salt caverns, 450 m high by 150 m in diameter, has shown that one cavern can store 4 billion Sm-3 or 7.2 million tons of CO2. The salt dome studied can accommodate the construction of 15 caverns, thus providing the confinement of approximately 108 million tons of gas. (c) 2018 Society of Chemical Industry and John Wiley \& Sons, Ltd. (AU)

Processo FAPESP: 14/50279-4 - Brasil Research Centre for Gas Innovation
Beneficiário:Julio Romano Meneghini
Linha de fomento: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia