Mixing of CO2 and CH4 in Gas ReservoirsCode Comparison Studies

Oldenburg, C. M.; Law, David H.-S.; Gallo, Yann Le; White, Sarahlouise

doi:10.1016/b978-008044276-1/50071-4

Cited by 32 publications

(23 citation statements)

References 4 publications

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“…Variations in results between the four codes are seen to be more pronounced than for Problem 1, showing that larger differences can be expected for cases of more complex flow and transport. It should be noted, however, that concentrations along the profile at Z ¼ À50 m are very sensitive to small variations in the simulation at late times since the final position of the interface between the gases is located at approximately Z ¼ À50 m [5].…”

Section: Problem 2: Advective-diffusive Mixing Due To Lateral Densitymentioning

confidence: 99%

“…1). Problem specifications are given in a laboratory report [1], and a more detailed summary is presented in the Proceedings of the Sixth International Conference on Greenhouse Gas Technologies (GHGT-6) [5]. Mixing around the interface is mostly by molecular diffusion, although non-zero permeability allows minor advection to occur as gas pressures change upon mixing at the interface.…”

Section: Problem 1: Mixing Of Stably Stratified Gasesmentioning

confidence: 99%

See 1 more Smart Citation

Code intercomparison builds confidence in numerical simulation models for geologic disposal of CO2

Pruess

García

Kovscek

et al. 2004

Energy

192

109

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Section: Problem 2: Advective-diffusive Mixing Due To Lateral Densitymentioning

confidence: 99%

Section: Problem 1: Mixing Of Stably Stratified Gasesmentioning

confidence: 99%

Code intercomparison builds confidence in numerical simulation models for geologic disposal of CO2

Pruess

García

Kovscek

et al. 2004

Energy

192

109

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“…A separate report is available with a more detailed presentation of the results obtained by LBNL for the saline aquifer flow problems (#3, 4, and 7; Pruess and García, 2002b). A stand-alone report on the gas reservoir problems is presented in Oldenburg et al (2002).…”

Section: Table Of Contentsmentioning

confidence: 99%

Intercomparison of numerical simulation codes for geologic disposal of CO2

Pruess¹,

García²,

Kovscek³

et al. 2002

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Numerical simulation codes were exercised on a suite of eight test problems that address CO2 disposal into geologic storage reservoirs, including depleted oil and gas reservoirs, and brine aquifers. Processes investigated include single-and multi-phase flow, gas diffusion, partitioning of CO2 into aqueous and oil phases, chemical interactions of CO2 with aqueous fluids and rock minerals, and mechanical changes due to changes in fluid pressures. Representation of fluid properties was also examined. In most cases results obtained from different simulation codes were in satisfactory agreement, providing confidence in the ability of current numerical simulation approaches to handle the physical and chemical processes that would be induced by CO2 disposal in geologic reservoirs. Some discrepancies were also identified and can be traced to differences in fluid property correlations, and space and time discretization. iv v EXECUTIVE SUMMARYMathematical models and numerical simulation codes are playing an important role in evaluating the feasibility of geologic disposal of greenhouse gases, and they will be necessary tools for designing and operating future disposal systems. In order to serve these functions, simulation codes must be tested to demonstrate that they can adequately represent the physical and chemical processes that would be induced by injection of CO2 and other gases into geologic formations.The present code intercomparison study aimed at such testing and demonstration. The study was initiated and designed by LBNL in the framework of the GeoSeq project. The overall approach was as follows. In a first step, we designed a number of test problems that would probe major issues relating to geologic disposal of greenhouse gases. Actual field applications will involve threedimensional flows in media with multi-scale hydrologic and chemical heterogeneity, and coupled processes involving fluid dynamics, chemical reactions, mechanical deformation, and thermal effects. It was considered that establishing confidence in the capabilities of numerical simulators would be an iterative process, proceeding from simple to complex. Accordingly, the test problems posed for the present study were intentionally designed to be simplified prototypes of actual field problems.The main issues addressed in this work are as follows. Do we understand the fundamental physical and chemical processes that would play a role in geologic disposal of greenhouse gases? Do we have valid mathematical models for them? Can currently available numerical simulators obtain reliable and accurate numerical solutions for conditions and parameters of practical interest?As to the actual execution of the study, the initiators decided that worldwide participation would be sought, and that participants would work with their own funding and using codes available to them.It was hoped that the study would provide a win-win opportunity where all participants could benefit by testing and comparing their codes, learn from one another, and identify areas wh...

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“…As a means of testing and evaluating numerical simulation codes we launched a code intercomparison study that featured eight prototypical simulation problems for CO2 disposal in saline aquifers, or oil and gas reservoirs . Preliminary results of this study were presented at the Sixth International Conference on Greenhouse Gas Control Technologies (GHGT-6), held in October 2002 in Kyoto, Japan (Pruess et al, 2002a;Oldenburg et al, 2002), and a full report is available that compares results submitted by ten groups from six countries (Pruess et al, 2002b).…”

Section: Introductionmentioning

confidence: 99%

Solutions of test problems for disposal of CO2 in saline aquifers

Pruess¹,

García²

2003

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This report presents detailed results for three flow problems involving CO2 migration in saline aquifers, that had been posed as part of an international code intercomparison study. Selected data for PVT properties of aqueous mixtures involving CO2 are given, and the dynamics of immiscible displacement of an aqueous phase by supercritical CO2 is discussed. Simulations were conducted with a version of the TOUGH2 general purpose reservoir simulator that includes a special property package for supercritical CO2. The results can serve as benchmarks for debugging numerical simulation models.iv v

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Mixing of CO2 and CH4 in Gas ReservoirsCode Comparison Studies

Cited by 32 publications

References 4 publications

Code intercomparison builds confidence in numerical simulation models for geologic disposal of CO2

Code intercomparison builds confidence in numerical simulation models for geologic disposal of CO2

Intercomparison of numerical simulation codes for geologic disposal of CO2

Solutions of test problems for disposal of CO2 in saline aquifers

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