Polymer flood gains expansive popularity as a promising EOR method in various oilfields worldwide. However, there are still substantial amount of resources underground after polymer application. To further enhance oil recovery, secondary chemicals are sometimes utilized to sweep the remaining hydrocarbons to maintain the consistent development of oilfields. In this paper, a series of experiment...

Recently, a renewed interest arises in the application of nanotechnology for the upstream petroleum industry. In particular, adding nanoparticles to fluids may drastically benefit enhanced oil recovery and improve well drilling, by changing the properties of the fluid, rocks wettability alteration, advanced drag reduction, strengthening the sand consolidation, reducing the inter-facial tension and...

Recently, a renewed interest arises in the application of nanotechnology for the upstream petroleum industry. In particular, adding nanoparticles to fluids may drastically benefit enhanced oil recovery and improve well drilling, by changing the properties of the fluid, rocks wettability alteration, advanced drag reduction, strengthening the sand consolidation, reducing the inter-facial tension and...

Abstract Combination flooding, which performs well on both sweep efficiency and displacement efficiency, is being extensively utilized in Daqing Oilfield. Surfactant-polymer (SP) flooding alkaline-surfactant-polymer (ASP) are two of the most used combination techniques. According to findings, alkaline lowers oil-water interfacial tension reduces other component’s adsorption. Nevertheless, also ...

Some of the limitations a cost-effective alkaline surfactant flooding method include chemical precipitation and other formation damage issue which has greatly affected application especially in high salinity reservoirs. This study ascertains chelating attributes Ethylene-diamine-tetracetic Acid-(EDTA/NaOH), investigates ability EDTA/NaOH an anionic to improve oil recovery heavy sandstone format...

The remaining oil distribution and displacement mechanism of poly/surface dual flooding stage in medium high permeability reservoir are not clear. In this paper, the conditions Gangxi Area 3 Dagang Oilfield were taken as research object. Based on nuclear magnetic resonance large model physical simulation experiment, characterization micro macro residual start-up enhanced recovery experiment car...

Surfactant flooding is a proven method employed to improve the recovery of crude oil from subsurface reservoirs but knowledge about microemulsion formation, factors related their stability, and trapping mechanism components in still not clear for designing injection fluid specific type. The interaction mechanisms four oils with surfactant-brine solutions were studied this work better insight in...