Patent ID: 6581687
Filing Date: 2003-06-24
Classification: C09K,Y10S

Abstract:
A method of introducing an oil or gas field production chemical into a rock formation comprising oil and/or gas, which comprises passing a microemulsion down a production well and then into the formation, said microemulsion comprising (i) an oil phase, (ii) an aqueous phase comprising an aqueous solution of a water soluble oil field or gas field production chemical or an aqueous dispersion of a water dispersible oil field or gas field production chemical and (iii) at least one surfactant, wherein the aqueous phase is distributed in the oil phase in the form of droplets having a diameter in the range 1 to 1000 nm or in the form of microdomains having at least one dimension of length, breadth or thickness in the range 1 to 1000 nm.