Surfactant alternating gas/CO 2 (SAG) flooding is a promising enhanced oil recovery (EOR) technology, which has the potential to improve production beyond primary and secondary water methods. However, performance of SAG restricted due instability under high salinity reservoir conditions excessive surfactant adsorption. One convenient relatively low-cost option overcome limitations use low (LSW)...

Abstract As a surfactant solution system, microemulsion has attracted much attention due to its ultra-low interfacial tension, high solubilization and thermodynamic stability in the process of enhanced oil recovery. Different from water phase system polymer flooding ASP flooding, shows special state, existence may be phase, or phase. The can divided into upper middle lower according composition...

Abstract Surfactants are among the materials used to improve water properties for injection into oil reservoirs, and reduce phase crude interfacial tension (IFT). Recently, interest in use of natural surfactants has increased is constantly on rise solve some challenges using chemical such as incompatibility with environment high cost. In this study, we have aqueous extract powdered leaf Myrtus ...

Injectability of the polymer solution is a very important factor that determines effectiveness flooding for enhanced oil recovery. Here, medium and low permeability reservoir was taken as research object, effects relative molecular weight, concentration core on flow injection performance partially hydrolyzed polyacrylamide (HPAM) with without anionic-nonionic surfactant (ANS) were studied by in...

Alkaline/surfactant/polymer (ASP) flooding has been extensively applied to enhancing oil recovery. As an oil displacement agent, pe1troleum sulfonate (PS) is widely used in ASP pilot experiments. It is very important to find a petroleum sulfonate with a high interfacial activity and low adsorption loss. Anionic surfactant petroleum sulfonate is synthesized in a single-tube film sulfonation reac...