Abstract:A hybrid polymer‐assisted carbonated low‐salinity waterflood (PCLSWF) is a low‐salinity waterflood‐based enhanced oil recovery (EOR) co‐injecting CO2 and polymer. In the hybrid process, the low salinity of make‐up brine enhances CO2 deliverability into a reservoir due to the salting‐out phenomenon. This PCLSWF introduces the following synergetic effects: 1) wettability modification; 2) decreasing oil viscosity; 3) increasing brine viscosity. These effects are evaluated in core‐ and pilot‐scaled systems. First,… Show more
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