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Experimental salt cavern in offshore ultra-deep water and well designevaluation for CO_(2) abatement

International Journal of Mining Science and Technology 2019年第5期29卷 641-656页

作者： Alvaro Maia da Costa Pedro V.M.Costa Antonio C.O.Miranda Mariana B.R.Goulart Okhiria D.Udebhulu Nelson F.F.Ebecken Ricardo C.Azevedo Sérgio M.de Eston Giorgio de Tomi Andre B.Mendes Julio R.Meneghini Kazuo Nishimoto Claudio Mueller Sampaio Camila Brandao Alexandre Breda University of Sao Paulo(USP) Sao Paulo 01000-000Brazil Modecom-Technology in Geomechanics and Computing Modeling Rio de Janeiro 27570-000Brazil Department of Civil and Environment Engineering University of Brasília(UnB)Brasília 70000-000Brazil COPPE Federal University of Rio de JaneiroRio de Janeiro 27570-000Brazil Technology Division of Shell Shell BrazilRio de Janeiro 27570-000Brazil

This paper presents a proposal for an experimental salt cavern in offshore ultra-deep water for CO2 abatement,including the instrumentation plan and well conceptual design evaluated for carbon capture and storage(CCS)application.These studies are based on applied computational mechanics associated with field experimentation that has contributed to the technical feasibility of the underground potash mine at the State of Sergipe in Brazil.This knowhow allowed the stability analysis of several salt caverns for brine production at the State of Alagoas in Brazil and to the drilling through stratified thick layers of salt of the pre-salt reservoirs in Santos Basin.Now,this knowledge has been applied in the design of onshore and offshore salt caverns opened by dissolution for storage of natural gas and CO2.The geomechanical study,through the application of computational mechanics,of offshore giant salt caverns of 450 m high by 150 m in diameter,shows that one cavern can store about 4 billion Sm3 or 7.2 million tons of CO2.Before the construction of the giant cavern,which will be the first gas storage offshore in the world,it has been decided to develop an experimental one,with smaller size,to obtained field parameters.The experimental cavern will allow the calibration of parameters to be used in the structural integrity analysis of the cavern and well for storage of natural gas which is rich in CO2 under high pressure.

关键词： salt cavern pre-salt reservoir Geomechanical study Carbon capture and storage

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