skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Efficient parallel simulation of CO2 geologic sequestration insaline aquifers

Abstract

An efficient parallel simulator for large-scale, long-termCO2 geologic sequestration in saline aquifers has been developed. Theparallel simulator is a three-dimensional, fully implicit model thatsolves large, sparse linear systems arising from discretization of thepartial differential equations for mass and energy balance in porous andfractured media. The simulator is based on the ECO2N module of the TOUGH2code and inherits all the process capabilities of the single-CPU TOUGH2code, including a comprehensive description of the thermodynamics andthermophysical properties of H2O-NaCl- CO2 mixtures, modeling singleand/or two-phase isothermal or non-isothermal flow processes, two-phasemixtures, fluid phases appearing or disappearing, as well as saltprecipitation or dissolution. The new parallel simulator uses MPI forparallel implementation, the METIS software package for simulation domainpartitioning, and the iterative parallel linear solver package Aztec forsolving linear equations by multiple processors. In addition, theparallel simulator has been implemented with an efficient communicationscheme. Test examples show that a linear or super-linear speedup can beobtained on Linux clusters as well as on supercomputers. Because of thesignificant improvement in both simulation time and memory requirement,the new simulator provides a powerful tool for tackling larger scale andmore complex problems than can be solved by single-CPU codes. Ahigh-resolution simulation example is presented that models buoyantconvection, induced by a smallmore » increase in brine density caused bydissolution of CO2.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
USDOE
OSTI Identifier:
925539
Report Number(s):
LBNL-63316
R&D Project: G2W026; BnR: 600301020; TRN: US0803054
DOE Contract Number:
DE-AC02-05CH11231
Resource Type:
Conference
Resource Relation:
Conference: 2007 SPE Reservoir Simulation Symposium, Houston,TX, 26-28 February 2007
Country of Publication:
United States
Language:
English
Subject:
54; AQUIFERS; BRINES; COMMUNICATIONS; CONVECTION; DISSOLUTION; ENERGY BALANCE; IMPLEMENTATION; MIXTURES; PARTIAL DIFFERENTIAL EQUATIONS; PRECIPITATION; SIMULATION; SIMULATORS; SOLAR PROTONS; SUPERCOMPUTERS; THERMODYNAMICS

Citation Formats

Zhang, Keni, Doughty, Christine, Wu, Yu-Shu, and Pruess, Karsten. Efficient parallel simulation of CO2 geologic sequestration insaline aquifers. United States: N. p., 2007. Web.
Zhang, Keni, Doughty, Christine, Wu, Yu-Shu, & Pruess, Karsten. Efficient parallel simulation of CO2 geologic sequestration insaline aquifers. United States.
Zhang, Keni, Doughty, Christine, Wu, Yu-Shu, and Pruess, Karsten. Mon . "Efficient parallel simulation of CO2 geologic sequestration insaline aquifers". United States. doi:. https://www.osti.gov/servlets/purl/925539.
@article{osti_925539,
title = {Efficient parallel simulation of CO2 geologic sequestration insaline aquifers},
author = {Zhang, Keni and Doughty, Christine and Wu, Yu-Shu and Pruess, Karsten},
abstractNote = {An efficient parallel simulator for large-scale, long-termCO2 geologic sequestration in saline aquifers has been developed. Theparallel simulator is a three-dimensional, fully implicit model thatsolves large, sparse linear systems arising from discretization of thepartial differential equations for mass and energy balance in porous andfractured media. The simulator is based on the ECO2N module of the TOUGH2code and inherits all the process capabilities of the single-CPU TOUGH2code, including a comprehensive description of the thermodynamics andthermophysical properties of H2O-NaCl- CO2 mixtures, modeling singleand/or two-phase isothermal or non-isothermal flow processes, two-phasemixtures, fluid phases appearing or disappearing, as well as saltprecipitation or dissolution. The new parallel simulator uses MPI forparallel implementation, the METIS software package for simulation domainpartitioning, and the iterative parallel linear solver package Aztec forsolving linear equations by multiple processors. In addition, theparallel simulator has been implemented with an efficient communicationscheme. Test examples show that a linear or super-linear speedup can beobtained on Linux clusters as well as on supercomputers. Because of thesignificant improvement in both simulation time and memory requirement,the new simulator provides a powerful tool for tackling larger scale andmore complex problems than can be solved by single-CPU codes. Ahigh-resolution simulation example is presented that models buoyantconvection, induced by a small increase in brine density caused bydissolution of CO2.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share: