Application of fluid-rock reaction studies to in situ recovery from oil sand deposits, Alberta, Canada—II. Mineral transformations during an experimental-statistical study of water-bitumen-shale reactions

Boon, J.A.; Hitchon, Brian

doi:10.1016/0016-7037(83)90137-0

Cited by 11 publications

(1 citation statement)

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“…The reactions involved in this kind of CO 2 generation have been studied in connection with steam injection into oil sands in Alberta, where it has been found that clay formation invariably accompanies carbonate destruction and CO 2 generation (e.g. Boon & Hitcheon 1983; Kubacki et al. 1984; Hebner et al.…”

Section: Introductionmentioning

confidence: 99%

Modeling CO₂ generation, migration, and titration in sedimentary basins

Cathles¹,

Schoell²

2007

Geofluids

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High mole fraction CO 2 gases pose a significant risk to hydrocarbon exploration in some areas. The generation and movement of CO 2 are also of scientific interest, particularly because CO 2 is an important greenhouse gas. We have developed a model of CO 2 generation, migration, and titration in basins in which a high mole fraction CO 2 gas is generated by the breakdown of siderite (FeCO 3 ) and magnesite (MgCO 3 ) where parts of the basin are being heated above approximately 330°C. The CO 2 reacts with Fe-, Mg-, and Ca-silicates as it migrates upward and away from the generation zone (CO 2 -kitchen). Near the kitchen, where the Fe-, Mg-, and Ca-silicates have been titrated and destroyed by previous packets of migrating CO 2 , gas moves upward without lowering its CO 2 mole fraction. Further on, where Fe-and Mg-silicates are still present but Ca-silicates are absent in the sediments, the partial pressure of CO 2 is constrained to 0.1-30 bars and reservoirs contain a few mole percent CO 2 as described by Smith & Ehrenberg (1989). Still further from the source, where Ca-silicates have not been titrated, partial pressure of CO 2 in migrating methane gas are orders of magnitude lower. A 2D numerical model of CO 2 generation, migration, and titration quantifies these buffer relations and makes predictions of CO 2 risk in the South China Sea that are compatible with exploration experience. Reactive CO 2 transport models of the kind described could prove useful in determining how gases migrate in faulted sedimentary basins.

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Section: Introductionmentioning

confidence: 99%