Deployment Of Deep Profile Modification Plan In Hai 26 Block

Hai 26 Block is a conventional heavy oil reservoir, after many years of waterflooding, achieved good development effect. Affected by the strong reservoir heterogeneity and high oil-water viscosity,comprehensive water cut is 93%,recovery degree is 22.5%.In the present development mode,to further improve oil recovery is difficult.Through the investigation and research of deep profile modification,to analyse the present development situation of Hai 26 Block,through fine geological description,to evaluate waterflood development effet of Hai 26 Block.By comparing the reservoir conditions adaptability,remaining oil distribution and the development of similar reservoirs,to makesure the feasibility and potential of the deep profile modification.Through theoretical study and field test,to makesure optimization principle and foundation of the test area,to optimize the formation pattern design of the deep profile modification.Through the screening and optimization of the deep profile modification,determined suitable gel system,grain dilatation and Oil displacement system. Through the design of different oil displacement solution,which has optimize the slug size and chemical concentration,expect improve the recovery efficiency of 5.26%.This technology can provide technical support for the research of the deep profile modification and application,can slow decline rate and achieve economic development for the other types of waterflooding reservoirs,especially ordinary heavy oil reservoir.