N<sub>2</sub>-foam-assisted CO<sub>2</sub> huff-n-puff process for enhanced oil recovery in a heterogeneous edge-water reservoir: experiments and pilot tests
Hongda Hao, Jirui Hou, Fenglan Zhao, Handong Huang, Huaizhu Liu
Abstract
Edge water and gas can be temporarily delayed with the assistance of stable N<sub>2</sub> foam. The oil recovery enhanced by N<sub>2</sub>-foam-assisted CO<sub>2</sub> huff-n-puff was twice that by pure CO<sub>2</sub> huff-n-puff.
Topics & Concepts
Enhanced oil recoveryFoaming agentPolyacrylamidePulmonary surfactantPorous mediumPetroleum engineeringPorosityChemical engineeringMaterials scienceChemistryChromatographyComposite materialGeologyEngineeringEnhanced Oil Recovery TechniquesHydraulic Fracturing and Reservoir AnalysisHydrocarbon exploration and reservoir analysis