Study on Parameters Optimization and Adaptation of Nitrogen Foam Flooding in Reservoirs with High Water Cut and High Permeability

Abstract Most oil reservoirs in China have entered the stage of high water cut. Affected by heterogeneity reservoir, flow dominance channel is easily formed between injection-production wells plane direction such reservoirs, and phenomenon channelling intensified. Therefore, a numerical simulation study nitrogen foam flooding carried out this paper. According to reservoir characteristics target block, adaptability ultra-high cut studied, parameters injection production are optimized, applicable limits sensitivity analysed. The optimization results indexes obtained through as follows: method mixed injection, volume 0.3 PV, rate 200 m3/d, concentration foaming agent 0.5 wt%, gas–liquid ratio 1: 1. show that for high-water-cut technology can effectively improve effect enhance recovery. It exhibits excellent has very board application prospect. provide theoretical guidance field applications.