Solutions of test problems for disposal of CO2 in saline aquifers

Pruess, Karsten; García, Julio

doi:10.2172/810487

Cited by 10 publications

(6 citation statements)

References 16 publications

(26 reference statements)

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“…For the latter calculation (and also for the Hydrate Ridge cases), the following capillary pressure function [ van Genuchten , 1980] was adopted: where Two van Genuchten capillary pressure curves are plotted in Figure 1. These curves were computed using the following parameters: A typical value of P * for low‐permeability sediments (e.g., shales) is 0.1 MPa [see, e.g., Pruess and Garcia , 2002]; the value for high‐permeability sands is much lower. The Pc‐low (Pc‐high) curve in Figure 1 yields an entry pressure of ∼0.064 MPa (0.64 MPa) at a normalized critical gas saturation (= S g /( S b + S g )) of 0.10.…”

Section: Model Applicationsmentioning

confidence: 99%

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A mathematical model for the formation and dissociation of methane hydrates in the marine environment

Garg

Pritchett

Katoh³

et al. 2008

J. Geophys. Res.

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[1] To elucidate the geological processes associated with hydrate formation and dissociation in the marine environment under a wide range of conditions, we have developed a one-dimensional numerical computer model (simulator). The numerical model can be used to simulate the following aspects of hydrate formation, decomposition, reformation, and distribution: (1) burial history of deep marine sediments and associated phenomena (e.g., sediment compaction and consequent reduction in sediment porosity and permeability, fluid expulsion, time evolution of temperature and pressure, heat flux), (2) in situ generation of biogenic methane from buried organic carbon and methane solubility in formation brine, (3) methane hydrate formation, decomposition, reformation, and distribution in response to changes in gas concentration, pressure, temperature and fluid salinity (the hydrate formation and decomposition are treated as equilibrium processes), (4) influence of sulfate reduction zone under the seafloor on hydrate formation, (5) possible presence of a free gas zone beneath the gas hydrate stability zone, and (6) multiphase (i.e., liquid brine with dissolved gas, free gas, gas hydrate) flow through a deformable porous matrix. The model provides for a reduction/ increase in permeability due to the formation/decomposition of the gas hydrate. Initial applications of the model to study hydrate distribution at the Blake Ridge (site 997) and Hydrate Ridge (site 1249) are described. Model results are compared with chlorinity, sulfate, and hydrate distribution data.

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Section: Model Applicationsmentioning

confidence: 99%

“…A typical value of P* for low-permeability sediments (e.g., shales) is 0.1 MPa [see, e.g., Pruess and Garcia, 2002]; the value for high-permeability sands is much lower. The Pc-low (Pc-high) curve in Figure 1 yields an entry pressure of $0.064 MPa (0.64 MPa) at a normalized critical gas saturation (= S g /(S b + S g )) of 0.10.…”

Section: Blake Ridge (Site 997)mentioning

confidence: 99%

A mathematical model for the formation and dissociation of methane hydrates in the marine environment

Garg

Pritchett

Katoh³

et al. 2008

J. Geophys. Res.

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“…In the presentation we include those data that most clearly highlight areas of agreement as well as disagreement between different codes. 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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“…It allowed simulating the flow of single and multi-phase isothermal and non-isothermal fluids, enabling the simulation of multi-phase flows, including the phenomena of adsorption and diffusion. The simulator uses the finite difference method (the Integral Finite Differences formulation (IFD)) [30][31][32]. For further considerations, the ECO2N co-processor was used allowing modeling the injection of CO 2 into geological structures.…”

Section: Conceptual Geological Model and Numerical Modelling Of The Bmentioning

confidence: 99%

An Assessment of the Formations and Structures Suitable for Safe CO2 Geological Storage in the Upper Silesia Coal Basin in Poland in the Context of the Regulation Relating to the CCS

et al. 2020

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The paper presents an analysis of the possible location of geological formations suitable for CO2 storage in the Upper Silesia Coal Basin, Poland. The range of the reservoir has been determined on the basis of an analysis of basic geological parameters, which determine the selection criteria for sites suitable for CO2 storage. A dynamic modelling of the CO2 distribution in the aquifer is presented. Based on the constructed model of migration, reactivity, and geochemical transport of CO2 in geological structures, it is possible to identify potential migration routes and escape sites of CO2 on the surface. The analysis of the technical and geological possibilities of CO2 storage was carried out according to the regulations of the complex Polish geological law, specifically in terms of sequestration possibilities in geological formations.

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Solutions of test problems for disposal of CO2 in saline aquifers

Cited by 10 publications

References 16 publications

A mathematical model for the formation and dissociation of methane hydrates in the marine environment

A mathematical model for the formation and dissociation of methane hydrates in the marine environment

Intercomparison of numerical simulation codes for geologic disposal of CO2

An Assessment of the Formations and Structures Suitable for Safe CO2 Geological Storage in the Upper Silesia Coal Basin in Poland in the Context of the Regulation Relating to the CCS

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