STUDY AND APPLICATION OF SUPERFINE MINIMAL INFLATION CEMENT SLURRY

Tertiary infill adjustment wells have many problems,such as large interzonal differential pressure,thin interlayer and easy channeling,cement shrinking reduce cementing quality.Aim at the problem,superfine minimal inflation cement slurry system (DPDR) was developed.through contrast test between the slurry system and common A grade slurry,it is indicated that the slurry system had better dilatability,lower water lose character and increasing toughness.The slurry system had similar orthogonal thickening curve,can improve tertiary infill adjustment well cementing quality.Field test indicate that DPDR cement slurry system has better effect at original phase,it can control slurry cementation quality with time changing,and can improve availably tertiary infill adjustment well cementing quality.