Development characteristics of low oil saturation reservoirs

摘要: Abstract The filtration characteristics of low oil saturation reservoirs are obviously different from that conventional reservoirs. development performance and the influence factors for were studied using laboratory large model physical modeling reservoir numerical simulation, to match establish empirical formula water cut variation. In stimulation process, effect threshold pressure on permeability was considered, which made results more realistic. There wasn't a period recovery without reservoirs; increased rapidly at beginning, dropped slightly before production with stable cut. higher initial saturation, shorter time Recovery changed greatly injection/production gradient when close pseudo gradient. little, even no change, far larger than positive correlation between degree injection rate less