关键词: 启动压力梯度 , 低渗透 , 非线性渗流 , 生产动态 , 数值模拟

Abstract: Threshold pressure gradient has an important influence to low permeability reservoir production. According to the site to obtain core laboratory experiments to strike threshold pressure gradient and draw permeability threshold pressure gradient plates. The dynamic simulation mathematical model of reservoir production considering threshold pressure gradient was established. The different threshold pressure gradient on the reservoir production performance was examined under the conditions of formation average permeability and provide guidance onsite low permeability reservoir development.The results show that with the threshold pressure gradient increases,liquid production, the degree of recovery, anhydrous degree of recovery have a decreasing trend and a slight increase in the moisture content. Threshold pressure gradient has an important influence on the balanced injection,the well. Water injection with threshold pressure gradient increases gradually reduced.

Key words: Threshold pressure gradient,    ,  Lowpermeability,    , Nonlinear seepage,    ,  Production performance,   ,  Numerical simulation