Abstract: By using numerical simulation method. the rerovery mnechanism and Imajor ge(logic factors and fluid properties affecting production efficiency in Hongnan oilfield with edge-bottom wuter were simulated and estimated. The major geologic factors and fluid properties include sedimentary rhythm, KJ K ratio, crude oil viscosity. oil/ water mobility ratio and water-oil density difference. This study would provide basis for appropriate devlopment of Hongnan oilfeld and taking technical counterrurasures. Also. it could be lsed for reference to siinilar oilfield developnent.

Key words: Turpun basin, Hani Basin, Edge water, Butlol wator reservoir. Button waler corning.