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Study on blast furnace slag cement slurry system with high density

LU Ning,LIU Xiao-xi (Drilling Institute,Drilling & Production Technology Research Institute of Changqing Oilfield,Xi'an 710021,China)  
The paper discusses how to make up blast furnace slag (BFS) cement slurry system with high density of 1.75~1.92g/cm 3 using BFS as hydration material,adding some slag activation agent,cement and bentonite.The cement slurry system is used to plug up hydrocarbon reservoirs.Compression strength,initial/final setting time and rheological properties of three cement slurry systems with densities of 1.75g/cm 3,1.83g/cm 3 and 1.93g/cm 3 are tested at 45℃,60℃ and 75℃ using API experimental method.Testing results show that compression strength of high density slag cementstone is lower than G cementstone with the same density,but can meet the requirement of perforation.Meanwhile,rheological property and stability of furnace slag cement slurry with high density can meet the need of field operation.And slag cementstone can't be eroded by sulphate.
【CateGory Index】: TE256.7
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