Application of a non-ionic bio-surfactant instead of chemical additives for prevention of the permeability impairment of a swelling sandstone oil reservoir

Abstract Formation damage is a general term, which refers to any process that reduces the production or injectivity of an oil well. Clay swelling formation damage, due incompatible fluid invasion, common problem in petroleum industry. In this research, effect Acanthophyllum root extract (ACRE) , bio-based surfactant, on reduction reservoir permeability impairment has been studied. Some static tests were applied investigate chemical interaction between surfactant and montmorillonite (Mt), including Mt sedimentation test, Free index (FSI) Zeta potential tests, particle size measurement, scanning electron microscopy (SEM). Experiments followed by coreflood micromodel verify their preventing pore plugging porous media. According results, dispersion unstable presence ACRE solution. can reduce FSI from 233.3 (totally hydrated Mt) 94.3%, representing hydration potential. The zeta aqueous solution moves toward lowest magnitude, implying water molecules surrounding particles are unstable. Particle measurement SEM analysis proved simultaneously sustains flocculated prevents delamination. thermal stability was evaluated thermogravimetric (TGA), it showed suitable resistance temperature rise. Eventually, revealed high performance lowering plugging. All all, and, therefore, clay-bearing sandstones.