Adjustment Well Cementing Technology in Late Development Stage in Low Permeability Oilfield

Adjustment well cementing in late development stageis a common difficult probjem in petroleum industry atpresent, especially in low permeability reservoirs. A set ofmeasures are taken in Henan oilfield including enhancingstopping injection and production, improving slurryproperties, raising displacement effciency, using expansivecement with multiple solidification point system andapplying screening and temporary plugging technology.Field application show that they are suitable for use inlowpermeability reservoirs and have yielded desirable results.