Method for oil recovery improvement

Details Method for oil recovery improvement Method for oil recovery improvement

E - Fixed Constructions

21

B

166/16

E21B 33/138 (2006.01)

Patent

CA 1051774

METHOD FOR OIL RECOVERY IMPROVEMENT (D#74,107 -F) ABSTRACT OF THE DISCLOSURE, In a subterranean reservoir, a strata or zone of high permeability as compared to other stratas of the reservoir may be plugged by forming a solid gel in situ within the highly permeable strata. The gel plug is formed by injecting a colloidal silica suspension into the strata which is in a liquid state and contacting the suspension in situ with a surfactant. Upon mixing with the surfactant, the colloidal silica suspension forms a gel which effectively plugs the highly permeable zone blocking further fluid flow through the zone. I

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