Influence of Air−Water Interfacial Adsorption and Gas-Phase Partitioning on the Transport of Organic Chemicals in Unsaturated Porous Media

1998 ◽  
Vol 32 (9) ◽  
pp. 1253-1259 ◽  
Author(s):  
Heonki Kim ◽  
Michael D. Annable ◽  
P. Suresh C. Rao
Keyword(s):  
Porous Media ◽  
Gas Phase ◽  
Organic Chemicals ◽  
Unsaturated Porous Media ◽  
Phase Partitioning ◽  
Interfacial Adsorption

Low Adsorbing CO2 Soluble Surfactants for Commercially Viable Implementation of CO2 Foam EOR Technology

2021 ◽  
Author(s):  
Amit Katiyar ◽  
Troy Knight ◽  
Adam Grzesiak ◽  
Pete Rozowski ◽  
Quoc Nguyen
Keyword(s):  
Porous Media ◽  
Gas Phase ◽  
Surfactant Concentration ◽  
Water Soluble ◽  
Phase Partitioning ◽  
Modeling Approach ◽  
Aqueous Foam ◽  
Co2 Foam ◽  
Soluble Surfactants ◽  
Foam Modeling

Abstract Several gas Enhanced Oil Recovery (EOR) pilots enhanced with aqueous-foam based conformance solutions have been implemented in the last 30 years. While these pilots were technically successful, there were economic challenges limiting their commercial viability. Many of these pilots were implemented with water-soluble foaming surfactants that can get adversely affected by near wellbore gas-water gravity segregation and adsorption loss up to 90% of the injected surfactant. Novel, gas-soluble surfactants can be injected with the gas phase where these surfactants are carried with the gas to thief zones faster and deeper with relatively lower adsorption to the rock surface. However, the conventional foam modeling approach relied only on the surfactant concentration in brine to determine foam strength, which adversely predicted the performance of gas soluble surfactants. With proven laboratory evaluations and multiple successful field implementations, the advantages of low adsorbing and gas soluble surfactants cannot be ignored. In this paper, the advantages of surfactant partitioning to the gas phase are confirmed by correcting the conventional foam modeling approach while simulating 1D transport of CO2-foam displacing brine in porous media. An empirical foam model was developed from the lab scale core flooding work of CO2foam transport through porous media using a novel gas-soluble foaming surfactant. While investigating the performance of gas soluble surfactants, global surfactant concentration was used to determine foam strength as the surfactant can transport to the gas-water interface from both the phases. Lab experiments and simulations with an improved foam modeling approach confirmed that a higher gas phase partitioning surfactant generated robust foam and deeper foam propagation while injecting surfactant with CO2in a water saturated core. In addition, comparing three partition coefficient scenarios around 1 on mass basis, the higher gas phase partitioning surfactant showed the larger delay in gas breakthrough. Overall, the simulation results with our better modeling approach do support the advantages of the higher gas phase surfactant partitioning in deeper foam transport and conformance enhancement for the gas-EOR technology.

Transport characteristics of gas phase ozone in unsaturated porous media for in-situ chemical oxidation

2002 ◽  
Vol 57 (1-2) ◽  
pp. 81-98 ◽  
Author(s):  
Heechul Choi ◽  
Hyung-Nam Lim ◽  
Jeongkon Kim ◽  
Tae-Moon Hwang ◽  
Joon-Wun Kang
Keyword(s):  
Porous Media ◽  
Gas Phase ◽  
Chemical Oxidation ◽  
Unsaturated Porous Media ◽  
In Situ Chemical Oxidation
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