Enhanced oil recovery from fractured carbonate reservoir using membrane technology

摘要: Abstract Membrane technology has been investigated experimentally for enhanced oil recovery (EOR) in fractured rocks this paper. Two membrane-forming material fluids, copper sulfate solution and potassium hexacyanoferrate solution, are sequentially injected into a rock which was pre-saturated with mineral irreducible water using high solute fluid, to form semi-permeable membrane over the surface of rock. Then low concentration fluid is establish chemical potential gradient across membrane. As result, can enter matrix increase pore pressure displace additional from matrix. Factors influence osmotic have examined their effect on recovery. It found that rate increases increasing concentrations materials, temperature, ratio between injection as well decreasing permeability rocks. Such correlation attributed spontaneously occurrence osmosis, leading entering being displaced. The results indicating may be an effective EOR method carbonate reservoir.