Enhanced oil recovery by alkaline-surfactant-alternated-gas/CO2 flooding

A model study of enhanced oil recovery by flooding with aqueous surfactant solution and comparison with theory . Paul

With the aim of elucidating the details of enhanced oil recovery by surfactant solution flooding, we have determined the detailed behaviour of model systems consisting of a packed column of calcium carbonate particles as the porous rock, n-decane as the trapped oil and aqueous solutions of the anionic surfactant sodium bis-2-ethylhexyl sulfosuccinate (AOT). The AOT concentration was varied from...

Enhanced Oil Recovery and CO2 Flooding/Sequestration in Carbonates

An Experimental Study of Surfactant Alternating CO2 Injection for Enhanced Oil Recovery of Carbonated Reservoir

Core flooding experiments were conducted with the objective of evaluating near miscible surfactant alternating CO2 injection and the effect of surfactant concentrations on gas-oil and water displacements in porous media. The core samples were provided from a low permeability mixed wet oil reservoir at 156 °F and 1900 psia. In addition, very few studies of surfactant adsorption on car...

Surfactant Stabilized Nanoemulsion: Characterization and Application in Enhanced Oil Recovery

Nanoemulsions are a class of emulsions with a droplet size in the range of 50–500 nm and have attracted a great deal of attention in recent years because it is unique characteristics. The physicochemical properties of nanoemulsion suggests that it can be successfully used to recover the residual oil which is trapped in the fine pore of reservoir rock by capillary forces after primary and second...

Microbial Enhanced Oil Recovery Using Biosurfactant Produced by Alcaligenes faecalis

A bacterial strain (designated as Alcaligenes sp. MS-103) isolated from oil sample of the Aghajari oilfield in the south of Iran, was able to produce an effective extracellular lipopolysaccharide biosurfactant (1.2±0.05 g/l) on molasses as a sole carbon source. The highest surface tension reduction to level 20 mN/m was achieved by biosurfactant produced by cells grown on molasses under optimum ...