دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. the underground accumulation of oil and gas in geological traps. 2. the accumulation in rock pores of large polymer or surfactant molecules unable to move because of small exit openings. The coiled-up molecules reduce the permeability of pores to water but permit oil to pass through the pores.