The main factor affecting the economics of foam-assisted water alternative gas (FAWAG) process is the loss of foaming agent by adsorption onto reservoir rocks. In this study, the effects of phases, surfactant concentration, salinity, adsorbents, and sacrificial agent on adsorption density were investigated by special adsorption experiments. Moreover, a series of FAWAG tests were performed to ex...

Aiming at improving the stability of Supercritical CO 2 (SC-CO ) foam in high temperature and salinity reservoirs, a kind betaine surfactant, Hexadecyl Hydroxypropyl Sulfo Betaine (HHSB), was screened to stabilize SC-CO foam. The properties were improved elevated pressure. effects surfactant concentration, temperature, pressure on film drainage rate measured explore results showed that an incre...

Abstract Chemical enhanced oil recovery (EOR) methods are shown to sweep the residual by altering physical properties of fluids after waterflooding improve recovery. This work presents an experimental study on surfactant/polymer injection for EOR in sandstone reservoirs. Interfacial tension measurements, emulsification and rheology tests performed select best candidates from thirteen commercial...

Low Salinity Water (LSW) and Alkaline-Surfactant-Polymer (ASP) flooding are emerging enhanced oil recovery methods that help recover from the reservoir after primary secondary processes. Experimental studies on LSW ASP have indicated potential in additional recovery. In this paper, numerical simulation was performed to study combined effects of flooding. A heterogenous initially saturated with ...

Oil is an important non-renewable resource for the world. The application of alkaline-surfactant-polymer flooding has successfully enhanced the oil recovery in Chinese oilfields. The oilfield produced water is the layer water that came from the oil well along with the oil in the alkaline-surfactant-polymer flooding. Thus, the treatment process of oilfield produced water to meet the reinjection ...

In order to determine the matching relationship of polymer molecular weight and reservoir permeability in ASP (alkaline/surfactant/polymer) flooding, a number of core flooding experiments with different polymer molecular weights are performed. Two types of curves for the relationship between the pressure difference and the injection pore volume multiples are obtained. One describes the characte...

This study aims to develop a visual understanding of the macro-displacement mechanisms associated with heavy oil recovery by water and chemical flooding in 2D system. The sweep efficiency improvements water, surfactant, polymer, surfactant-polymer (SP) were evaluated Hele-Shaw cell no local pore-level trapping fluids. results demonstrated that displacement performance is highly correlated mobil...