Multiphase Flow and Cavern Abandonment in Salt

Ehgartner, Brian L.; Tidwell, Vincent Carroll

doi:10.2172/774489

Cited by 2 publications

(3 citation statements)

References 7 publications

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“…Although there has recently been a growing interest in fluid flow through creeping salt (Aufricht and Howard, 1961;Niou and Deal, 1989;Stormont, 1990Stormont, , 1997Peach, 1991;Borgmeier, 1992;Olivella et al, 1996;Cinar et al, 1998Cinar et al, , 2001Cinar et al, , 2002Cosenza et al, 1999;Mueller-Lyda and Fein, 1999;Cinar, 2000;Ehgartner and Tidwell, 2000;Pusch and Alkan, 2002;Alkan et al, 2003), there is still a lack of reliable data on the hydraulic behaviour of compacted crushed salt. This is largely because most of the researchers have focused on the effects of compaction on the single-phase gas flow.…”

Section: Introductionmentioning

confidence: 99%

“…For accurate prediction of possible gas leakage into the biosphere, one needs data for two-phase flow through possible pathways coupled with the timedependent material deformation of salt (salt creep). A number of theoretical and experimental studies for the two-phase flow of brine and gas in deformed salt have already been published (Niou and Deal, 1989;Olivella et al, 1996;Cinar, 2000;Ehgartner and Tidwell, 2000). Reviews of a limited number of studies on fluid flow through salt (Cinar, 2000;Ehgartner and Tidwell, 2000) have concluded that there are no complete data of two-phase flow in creeping salt.…”

Section: Introductionmentioning

confidence: 99%

“…A number of theoretical and experimental studies for the two-phase flow of brine and gas in deformed salt have already been published (Niou and Deal, 1989;Olivella et al, 1996;Cinar, 2000;Ehgartner and Tidwell, 2000). Reviews of a limited number of studies on fluid flow through salt (Cinar, 2000;Ehgartner and Tidwell, 2000) have concluded that there are no complete data of two-phase flow in creeping salt. It is, therefore, essential to understand two-phase flow characteristics of the compacted salt, which greatly influence the rate and extent of gas and brine flow therein.…”

Section: Introductionmentioning

confidence: 99%

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Petrophysical and Capillary Properties of Compacted Salt

2006

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This paper reports experimental results that demonstrate petrophysical and capillary characteristics of compacted salt. The measured data include porosity, gas permeability, pore size distribution, specific surface area, and gas-brine breakthrough and capillary pressure. Salt samples employed in the experiments were prepared by compacting sodium chloride granulates at high stresses for several hours. They represent an intermediate consolidation stage of crushed salt under in-situ conditions. The porosity and permeability of compacted salt showed similar trends to those expected in backfilled regions of waste repositories excavated in salt rock. The correlation between the measured porosity and permeability seems to be independent of the compaction parameters for the range examined in this study. The correlation also shows a different behaviour from that of rock salt. The data of all petrophysical properties show that the pore structure of compacted salt can be better characterized by fracture permeability models rather than capillary bundle ones. Simple creep tests, conducted on the fully-brine-saturated compacted salt samples, yielded similar strain rates to those obtained by a steady-state mechanical model developed from the tests on fully brine-saturated granular salt. A modified procedure is proposed for the evaluation of restored-state capillary pressure data influenced by the material creep. The characteristic parameters for the capillary behaviour of compacted salt are determined by matching the Brooks-Corey and van Genuchten models with the measured data. The Leverett functions determined with different methods agree well.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Petrophysical and Capillary Properties of Compacted Salt

2006

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Safety of Salt Caverns Used for Underground Storage Blow Out; Mechanical Instability; Seepage; Cavern Abandonment

Bérest

Brouard²

2003

Oil & Gas Science and Technology - Rev. IFP

156

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Résumé -Sécurité des cavernes de sel utilisées pour le stockage souterrain. Éruption ; instabilité mécanique ; perte d'étanchéité ; abandon des cavernes -Des milliers de cavernes souterraines créées dans des massifs de sel (dont une centaine en France) sont utilisées pour stocker les hydrocarbures. Ce mode de stockage est le plus sûr pour de grands volumes d'hydrocarbures : les formations salines sont presque parfaitement imperméables, et l'incendie ou l'explosion sont impossibles sous terre en l'absence d'oxygène. Néanmoins, un petit nombre d'accidents sont survenus dans le passé : éruption, fuite des produits, instabilité des cavernes. L'abandon des cavernes est une préoccupation plus récente. Cet article décrit plusieurs accidents, et les leçons qui ont pu en être tirées. Elles ont conduit à une amélioration considérable de la conception et l'exploitation de ces ouvrages. Abstract

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Multiphase Flow and Cavern Abandonment in Salt

Cited by 2 publications

References 7 publications

Petrophysical and Capillary Properties of Compacted Salt

Petrophysical and Capillary Properties of Compacted Salt

Safety of Salt Caverns Used for Underground Storage Blow Out; Mechanical Instability; Seepage; Cavern Abandonment

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