Twelve-year monitoring of the idle Etrez salt cavern

Autor: Berest, Pierre, Bérest, P., Brouard, Benoît, Hévin, Grégoire
Přispěvatelé: Laboratoire de mécanique des solides (LMS), École polytechnique (X)-MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)
Rok vydání: 2011
Předmět:
Zdroj: International Journal of Rock Mechanics and Mining Sciences
International Journal of Rock Mechanics and Mining Sciences, Pergamon and Elsevier, 2011, Volume 48 (1), pp.168-173. ⟨10.1016/j.ijrmms.2010.07.004⟩
ISSN: 1365-1609
1873-4545
Popis: In 2001, a paper describing a salt-cavern abandonment test was published in this journal [1]. This test was motivated by concerns raised by the long-term behaviour of abandoned salt caverns, which are leached out from salt formations, having depths ranging from 200 to 2000 m and typical volumes from 10,000 to 1,000,000 m. Thousands of such caverns have been created, and are used for brine production and/or hydrocarbon storage. These caverns eventually will be abandoned: the cavern will be filled with brine, a special plug will be set at the casing seat, and cement will be poured in the well. A large ‘‘bubble’’ of saturated brine will be isolated. The long-term evolution of this brine is a serious concern. After cavern plugging, cavern brine pressure will increase, as has been proved by numerous ‘‘shut-in pressure tests’’ performed worldwide [2,3]. The final value of cavern brine pressure is of utmost importance from the perspective of environmental protection. In some circumstances, brine pressure may reach a figure larger than the geostatic pressure, leading to hydrofracturing: brine will flow upward through fractures to shallow water-bearing strata, leading to water pollution, ground subsidence and possible cavern collapse. Pressure evolution in a closed cavern results from four main factors: cavern creep closure, brine thermal expansion, brine permeation through the cavern walls and brine leaks.
Databáze: OpenAIRE
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