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Title: Novel CO2 Foam Concepts and Injection Schemes for Improving CO2 Sweep Efficiency in Sandstone and Carbonate Hydrocarbon Formations

We explored cationic, nonionic and zwitterionic surfactants to identify candidates that have the potential to satisfy all the key requirements for CO2 foams in EOR. We have examined the formation, texture, rheology and stability of CO2 foams as a function of the surfactant structure and formulation variables including temperature, pressure, water/CO2 ratio, surfactant concentration, salinity and concentration of oil. Furthermore, the partitioning of surfactants between oil and water as well as CO2 and water was examined in conjunction with adsorption measurements on limestone by the Hirasaki lab to develop strategies to optimize the transport of surfactants in reservoirs.
 [1] ;  [2] ;  [3]
  1. Univ. of Texas, Austin, TX (United States). Department of Petroleum & Geosystems Engineering
  2. Rice Univ., Houston, TX (United States). Department of Chemical Engineering
  3. Univ. of Texas, Austin, TX (United States). Department of Chemical Engineering
Publication Date:
OSTI Identifier:
DOE Contract Number:
Resource Type:
Technical Report
Research Org:
Univ. of Texas, Austin, TX (United States)
Sponsoring Org:
Contributing Orgs:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, and Morgantown, WV (United States)
Country of Publication:
United States
Oil/Gas - General; Drilling/Completion; Stimulation; Modeling/Analysis