Recent advances of surfactant-stabilized N2/CO2 foams in enhanced oil recovery

Sun, Lin; Bai, Baojun; Wei, Bing; Pu, Wanfen; Wei, Peng; Li, Daibo; Zhang, Changyong

doi:10.1016/j.fuel.2018.12.016

Cited by 113 publications

(43 citation statements)

References 102 publications

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“…The foamability of the surfactant is closely related to the interfacial tension. The lower interfacial tension decreases the required external forces to generate the finely textured foam [13].…”

Section: Introductionmentioning

confidence: 99%

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A Novel Approach to Stabilize Foam Using Fluorinated Surfactants

Kamal

2019

Energies

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Selection of surfactants for enhanced oil recovery and other upstream applications is a challenging task. For enhanced oil recovery applications, a surfactant should be thermally stable, compatible with reservoir brine, and have lower adsorption on reservoir rock, have high foamability and foam stability, and should be economically viable. Foam improves the oil recovery by increasing the viscosity of the displacing fluid and by reducing the capillary forces due to a reduction in interfacial tension. In this work, foamability and foam stability of two different surfactants were evaluated using a dynamic foam analyzer. These surfactants were fluorinated zwitterionic, and hydrocarbon zwitterionic surfactants. The effect of various parameters such as surfactant type and structure, temperature, salinity, and type of injected gas was investigated on foamability and foam stability. The foamability was assessed using the volume of foam produced by injecting a constant volume of gas and foam stability was determined by half-life time. The maximum foam generation was obtained using hydrocarbon zwitterionic surfactant. However, the foam generated using fluorinated zwitterionic surfactant was more stable. A mixture of zwitterionic fluorinated and hydrocarbon fluorinated surfactant showed better foam generation and foam stability. The foam generated using CO2 has less stability compared to the foam generated using air injection. Presence of salts increases the foam stability and foam generation. At high temperature, the foamability of the surfactants increased. However, the foam stability was reduced at high temperature for all type of surfactants. This study helps in optimizing the surfactant formulations consisting of a fluorinated and hydrocarbon zwitterionic surfactant for foam injections.

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Section: Introductionmentioning

confidence: 99%

“…The foam stability of any surfactant is determined by the interaction of different factors which include both bulk phase and interface properties [13]. For bulk phase, gravity drainage and gas diffusion cause the foam to destabilize.…”

Section: Introductionmentioning

confidence: 99%

A Novel Approach to Stabilize Foam Using Fluorinated Surfactants

Kamal

2019

Energies

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“…As a type of anionic surfactant, sodium dodecyl sulfate (SDS) is broadly used in sandstone reservoirs, which has advantages of foaming, thermal stability and low cost. [33][34][35] (2) A stabilizer needs to be added to generate a more stable foam for water and gas plugging. Adding a polyacrylamide (HPAM) additive can effectively increase the apparent viscosity and enhance the stability of foam.…”

Section: Introductionmentioning

confidence: 99%

N₂-foam-assisted CO₂ huff-n-puff process for enhanced oil recovery in a heterogeneous edge-water reservoir: experiments and pilot tests

et al. 2021

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“…Nonylphenol ethoxylate (NPEO) is one of the most produced nonionic surfactants, which is used for decades as household cleaning products [19,20], for micellar extraction of residues from water [21][22][23], and chemical EOR [24,25]. Several works showed improved performance of NPEO surfactants modified by different ionic groups, including carboxyl, sulfonate, sulfate groups [26][27][28][29][30][31][32]. An addition of ionic groups in nonionic surfactant molecules increases surfactant surface activity and cloud point temperature.…”

Section: Introductionmentioning

confidence: 99%

Nonylphenol Ethoxylate Surfactants Modified by Carboxyl Groups for Foam EOR at High-Salinity Conditions

et al. 2021

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High mineralization of water complicates the use of foam in reservoir conditions. Anionic–nonionic surfactants are one of the best candidates for these conditions since they have both high surface activity and salt tolerance. One of the ways to obtain anionic–nonionic surfactants is to modify nonionic surfactants by an anionic group. The type of the group and its chemical structure can strongly affect the properties of the surfactant. In this work, widely-produced nonionic surfactant nonylphenol (12) ethoxylate (NP12EO) was modified by new types of carboxylic groups through the implementation of maleic (NP12EO-MA) and succinic (NP12EO-SA) anhydrides with different saturation levels. The main objectives of this work were to compare synthesized surfactants with nonionic precursor and to reveal the influence of unsaturated bonds in the carboxyl group on the properties of the foam. NaCl concentration up to 20 wt% was used to simulate high mineralization conditions, as well as to assess the effect of unsaturated bonds on foam properties. Synthesized anionic–nonionic surfactants retained surfactant solubility and long-term stability in high-salinity water, but have better foaming ability, as well as higher apparent viscosity, in porous media. The presence of an unsaturated bond in NP12EO-MA surfactant lowers foaming ability at high mineralization.

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Recent advances of surfactant-stabilized N2/CO2 foams in enhanced oil recovery

Cited by 113 publications

References 102 publications

A Novel Approach to Stabilize Foam Using Fluorinated Surfactants

A Novel Approach to Stabilize Foam Using Fluorinated Surfactants

N₂-foam-assisted CO₂ huff-n-puff process for enhanced oil recovery in a heterogeneous edge-water reservoir: experiments and pilot tests

Nonylphenol Ethoxylate Surfactants Modified by Carboxyl Groups for Foam EOR at High-Salinity Conditions

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Recent advances of surfactant-stabilized N2/CO2 foams in enhanced oil recovery

Cited by 113 publications

References 102 publications

A Novel Approach to Stabilize Foam Using Fluorinated Surfactants

A Novel Approach to Stabilize Foam Using Fluorinated Surfactants

N2-foam-assisted CO2 huff-n-puff process for enhanced oil recovery in a heterogeneous edge-water reservoir: experiments and pilot tests

Nonylphenol Ethoxylate Surfactants Modified by Carboxyl Groups for Foam EOR at High-Salinity Conditions

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N₂-foam-assisted CO₂ huff-n-puff process for enhanced oil recovery in a heterogeneous edge-water reservoir: experiments and pilot tests