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

Title: The U.S. Gas Flooding Experience: CO2 Injection Strategies and Impact on Ultimate Recovery

Abstract

The Permian Basin in West Texas and southwestern New Mexico has seen 45 years of oil reserve growth through CO2 enhanced oil recovery (CO2 EOR). More than 60 CO2 EOR projects are currently active in the region’s limestone, sandstone and dolomite reservoirs. Water alternating gas (WAG) has been the development strategy of choice in the Permian for several technical and economic reasons. More recently, the technology started to get implemented in the much more porous and permeable clastic depositional systems of the onshore U.S. Gulf Coast. Continued CO2 injection (CGI), as opposed to WAG, was selected as the injection strategy to develop Gulf Coast oil fields, where CO2 injection volumes are significantly larger (up to 6 times larger) than those of the Permian. We conducted a compositional simulation based study with the objective of comparing the CO2 utilization ratios (volume of CO2 injected to produce a barrel of oil) of 4 conventional and novel CO2 injection strategies: (1) continuous gas injection (CGI), (2) water alternating gas (WAG), (3) water curtain injection (WCI), and (4) WAG and WCI combination. These injection scenarios were simulated using the GEM module from the Computer Modeling Group (CMG). GEM is an advanced general equation-of-state compositionalmore » simulator, which includes equation of state, CO2 miscible flood, CO2/brine interactions, and complex phase behavior. The simulator is set up to model three fluid phases including water, oil, and gas. Our study demonstrates how the selected field development strategy has a significant impact on the ultimate recovery of CO2-EOR projects, with GCI injection providing maximum oil recovery in absolute volume terms, but with WAG offering a more balanced technical-economical approach.« less

Authors:
ORCiD logo [1]; ;
  1. The University of Texas at Austin
Publication Date:
Research Org.:
The University of Texas at Austin
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
Contributing Org.:
UT-BEG-Gulf Coast Carbon Center
OSTI Identifier:
1407712
Report Number(s):
DOE-UTBEG-4433-5
DOE Contract Number:
FE0024433
Resource Type:
Conference
Resource Relation:
Conference: 38th IEA-EOR Workshop & Symposium
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; CO2 EOR

Citation Formats

Nunez-Lopez, Vanessa, Hosseini, Seyyed, and Gil-Egui, Ramon. The U.S. Gas Flooding Experience: CO2 Injection Strategies and Impact on Ultimate Recovery. United States: N. p., 2017. Web.
Nunez-Lopez, Vanessa, Hosseini, Seyyed, & Gil-Egui, Ramon. The U.S. Gas Flooding Experience: CO2 Injection Strategies and Impact on Ultimate Recovery. United States.
Nunez-Lopez, Vanessa, Hosseini, Seyyed, and Gil-Egui, Ramon. Fri . "The U.S. Gas Flooding Experience: CO2 Injection Strategies and Impact on Ultimate Recovery". United States. doi:. https://www.osti.gov/servlets/purl/1407712.
@article{osti_1407712,
title = {The U.S. Gas Flooding Experience: CO2 Injection Strategies and Impact on Ultimate Recovery},
author = {Nunez-Lopez, Vanessa and Hosseini, Seyyed and Gil-Egui, Ramon},
abstractNote = {The Permian Basin in West Texas and southwestern New Mexico has seen 45 years of oil reserve growth through CO2 enhanced oil recovery (CO2 EOR). More than 60 CO2 EOR projects are currently active in the region’s limestone, sandstone and dolomite reservoirs. Water alternating gas (WAG) has been the development strategy of choice in the Permian for several technical and economic reasons. More recently, the technology started to get implemented in the much more porous and permeable clastic depositional systems of the onshore U.S. Gulf Coast. Continued CO2 injection (CGI), as opposed to WAG, was selected as the injection strategy to develop Gulf Coast oil fields, where CO2 injection volumes are significantly larger (up to 6 times larger) than those of the Permian. We conducted a compositional simulation based study with the objective of comparing the CO2 utilization ratios (volume of CO2 injected to produce a barrel of oil) of 4 conventional and novel CO2 injection strategies: (1) continuous gas injection (CGI), (2) water alternating gas (WAG), (3) water curtain injection (WCI), and (4) WAG and WCI combination. These injection scenarios were simulated using the GEM module from the Computer Modeling Group (CMG). GEM is an advanced general equation-of-state compositional simulator, which includes equation of state, CO2 miscible flood, CO2/brine interactions, and complex phase behavior. The simulator is set up to model three fluid phases including water, oil, and gas. Our study demonstrates how the selected field development strategy has a significant impact on the ultimate recovery of CO2-EOR projects, with GCI injection providing maximum oil recovery in absolute volume terms, but with WAG offering a more balanced technical-economical approach.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Sep 29 00:00:00 EDT 2017},
month = {Fri Sep 29 00:00:00 EDT 2017}
}

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: