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Title: Joule-Thomson Cooling Due to CO2 Injection into Natural GasReservoirs

Abstract

Depleted natural gas reservoirs are a promising target for Carbon Sequestration with Enhanced Gas Recovery (CSEGR). The focus of this study is on evaluating the importance of Joule-Thomson cooling during CO2 injection into depleted natural gas reservoirs. Joule-Thomson cooling is the adiabatic cooling that accompanies the expansion of a real gas. If Joule-Thomson cooling were extreme, injectivity and formation permeability could be altered by the freezing of residual water,formation of hydrates, and fracturing due to thermal stresses. The TOUGH2/EOS7C module for CO2-CH4-H2O mixtures is used as the simulation analysis tool. For verification of EOS7C, the classic Joule-Thomson expansion experiment is modeled for pure CO2 resulting in Joule-Thomson coefficients in agreement with standard references to within 5-7 percent. For demonstration purposes, CO2 injection at constant pressure and with a large pressure drop ({approx}50 bars) is presented in order to show that cooling by more than 20 C can occur by this effect. Two more-realistic constant-rate injection cases show that for typical systems in the Sacramento Valley, California, the Joule-Thomson cooling effect is minimal. This simulation study shows that for constant-rate injections into high-permeability reservoirs, the Joule-Thomson cooling effect is not expected to create significant problems for CSEGR.

Authors:
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
USDOE. Assistant Secretary for Fossil Energy. Office of Coaland Power Systems. National Energy Technology Laboratory
OSTI Identifier:
898956
Report Number(s):
LBNL-60158
R&D Project: G20903; BnR: AA3010000; TRN: US200706%%459
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Conference
Resource Relation:
Conference: TOUGH Symposium 2006, Berkeley, CA, 15-17 May2006
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; 54 ENVIRONMENTAL SCIENCES; CARBON SEQUESTRATION; FRACTURING; FREEZING; HYDRATES; MIXTURES; NATURAL GAS; PERMEABILITY; PRESSURE DROP; SIMULATION; TARGETS; THERMAL STRESSES; VERIFICATION

Citation Formats

Oldenburg, Curtis M. Joule-Thomson Cooling Due to CO2 Injection into Natural GasReservoirs. United States: N. p., 2006. Web.
Oldenburg, Curtis M. Joule-Thomson Cooling Due to CO2 Injection into Natural GasReservoirs. United States.
Oldenburg, Curtis M. Fri . "Joule-Thomson Cooling Due to CO2 Injection into Natural GasReservoirs". United States. doi:. https://www.osti.gov/servlets/purl/898956.
@article{osti_898956,
title = {Joule-Thomson Cooling Due to CO2 Injection into Natural GasReservoirs},
author = {Oldenburg, Curtis M.},
abstractNote = {Depleted natural gas reservoirs are a promising target for Carbon Sequestration with Enhanced Gas Recovery (CSEGR). The focus of this study is on evaluating the importance of Joule-Thomson cooling during CO2 injection into depleted natural gas reservoirs. Joule-Thomson cooling is the adiabatic cooling that accompanies the expansion of a real gas. If Joule-Thomson cooling were extreme, injectivity and formation permeability could be altered by the freezing of residual water,formation of hydrates, and fracturing due to thermal stresses. The TOUGH2/EOS7C module for CO2-CH4-H2O mixtures is used as the simulation analysis tool. For verification of EOS7C, the classic Joule-Thomson expansion experiment is modeled for pure CO2 resulting in Joule-Thomson coefficients in agreement with standard references to within 5-7 percent. For demonstration purposes, CO2 injection at constant pressure and with a large pressure drop ({approx}50 bars) is presented in order to show that cooling by more than 20 C can occur by this effect. Two more-realistic constant-rate injection cases show that for typical systems in the Sacramento Valley, California, the Joule-Thomson cooling effect is minimal. This simulation study shows that for constant-rate injections into high-permeability reservoirs, the Joule-Thomson cooling effect is not expected to create significant problems for CSEGR.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Apr 21 00:00:00 EDT 2006},
month = {Fri Apr 21 00:00:00 EDT 2006}
}

Conference:
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