Laboratory Investigation on Different Development Methods for Ultra-Low Permeability Oil Reservoir
特低渗油藏不同开发方式室内实验研究

Ultra-low permeability reservoir cores were divided into different grades according to permeability,then laboratory experiments of different development methods were carried out by water flooding,nitrogen drive and carbon dioxide drive respectively according to different core grades.For different development methods,the pressure gradient and displacement efficiency were measured,the relationship between the displacement efficiency and the permeability was regressed,and the effect of different development me...