Flooding process using a substantially anhydrous soluble oil

摘要: A substantially anhydrous soluble oil (4 percent water) followed by 0.01 PV fresh water (less than 1 TDS or 0.1 polyvalent ions), thickened (Pusher 500), then brine recovered more residual either the microemulsion (44.5 without slug. The forms emulsions which expand volume of slug, and microemulsions increase viscosity in situ. surfactant slug contained petroleum sulfonates, Illinois crude, butyl cellosolve, water. Packs Nevada sand were saturated with (2 sodium chloride, 0.5 calcium 0.3 magnesium chloride), flooded crude (7 cp), brine. Alternating slugs 88.3 oil.