https://link.springer.com/content/pdf/10.1007%2Fs12182-017-0198-6.pdf

Review of surfactant-assisted chemical enhanced oil recovery for carbonate reservoirs: challenges and future perspectives

The trend of growing interest in alternative source of energy focuses on renewable products worldwide However, the situation of petroleum industries in many countries needs much concern in improving the oil recovery technique Chemical method, especially microemulsion flooding, plays an important role in enhanced oil recovery technique due to its ability to reduce interfacial tension between oil and water to a large extent as well as alter wettability of reservoir rocks Surfactant-based chemical systems have been reported in many academic studies and their technological implementations are potential candidates in enhanced oil recovery activities This paper reviews the role of different types of surfactants in enhanced oil recovery, structure of microemulsion, phase behavior of oil–brine–surfactant/cosurfactant systems with variation of different parameters such as salinity, temperature, pressure and physicochemical properties of microemulsions including solubilization capacity, interfacial tension, viscosity and density under reservoir conditions The enhanced oil productivity by microemulsion flooding with different surfactant/cosurfactant systems has also been discussed in this paper This review introduces a new opening in enhanced oil recovery by microemulsion flooding with some new aspects

/pdf/microemulsions-a-novel-approach-to-enhanced-oil-recovery-a-12dhb7e42y.pdf

Microemulsions: a novel approach to enhanced oil recovery: a review

Foam assisted CO2-EOR: A review of concept, challenges, and future prospects

Bentheimer sandstone revisited for experimental purposes

Synergistic interactions at the interface of nanoparticles (bare colloidal silica) and surfactant (caprylamidopropyl betaine) led to the generation of viscous and stable CO2-in-water (C/W) foams with fine texture at 19.4 MPa and 50°C. Interestingly, neither species generated C/W foams alone. The surfactant became cationic in the presence of CO2 and adsorbed on the hydrophilic silica nanoparticle surfaces resulting in an increase in the carbon dioxide/water/nanoparticle contact angle. The surfactant also adsorbed at the CO2–water interface, reducing interfacial tension to allow formation of finer bubbles. The foams were generated in a beadpack and characterized by apparent viscosity measurements both in the beadpack and in a capillary tube viscometer. In addition, the macroscopic foam stability was observed visually. The foam texture and viscosity were tunable by controlling the aqueous phase composition. Foam stability is discussed in terms of lamella drainage, disjoining pressure, interfacial viscosity, and hole formation. © 2013 American Institute of Chemical Engineers AIChE J, 59: 3490–3501, 2013

Carbon dioxide-in-water foams stabilized with nanoparticles and surfactant acting in synergy

Assessment of CO2-soluble non-ionic surfactants for mobility reduction using mobility measurements and CT imaging

Assessment of CO2-Soluble Surfactants for Mobility Reduction using Mobility Measurements and CT Imaging

The present disclosure provides a surfactant composition for use in treating and recovering oil from an oil-bearing subterranean formation. The surfactant composition includes a primary surfactant and a biodegradable chelant comprising ethylenediamine disuccinc acid and/or sodium salts thereof. The composition may be injected into one or more injection wells and into the subterranean formation and oil can then be subsequently recovered from one or more producing wells

Biodegradable chelant for surfactant formulation

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Assessment of CO2-soluble non-ionic surfactants for mobility reduction using mobility measurements and CT imaging

Assessment of CO2-Soluble Surfactants for Mobility Reduction using Mobility Measurements and CT Imaging

Biodegradable chelant for surfactant formulation