Experimental investigations of oil displacement using the WAG method with carbon dioxide

Abstract

The article presents results of experimental studies of oil displacement efficiency by Water Alternating Gas (WAG) injection using carbon dioxide. WAG process was implemented as a tertiary recovery method, after waterflooding. The experiments were conducted on a long-core reservoir model at thermobaric conditions, which are characteristic for Polish carbonate reservoirs. Carbon dioxide injection was performed under miscible conditions (above minimum miscibility pressure). The results have practical importance because they confirm the suitability of conducting WAG process analysis on mentioned reservoir model and they present the WAG method effectiveness in specific reservoir conditions.