RESEARCH AND APPLICATION OF PROFILE CONTROL AND OIL DISPLACEMENT TECHNOLOGY WITH SECTIONAL COMPOUNDING GEL

Research and applications of profile/displacement control technology in deep water wells were developed to solve difficulty of plugging big channels generally exist in reservoirs at Dagang oilfield. Based on the oil displacement profile control agent of developed pre-cross-link gel grains, underground cross-linking gel and elastic grain, developed profile/displacement control system of sectional compounding gel, it enhanced block capacity to big channels in reservoirs, and application in 193 wells since 2001 get 81.3% efficiency, increased crud oil 17.53×104 t. this technology have inaugurated a new approach to tap the latent power of water flooding oilfield and will be gradually popularized and applied.