南翼山浅油藏Ⅲ+IV油组注采系统合理压力研究

Reasonable Pressure of Injection System in Ⅲ+IV Oil Group in Nanyishan Shallow Reservoir

南翼山Ⅲ+IV油组初期因地层亏空严重,地层压力已低于饱和压力,如不及时补充地层能量,将会导致原油脱气、原油粘度升高、渗流阻力增加、采油指数降低等情况的发生。针对Ⅲ+IV油组开发过程中的实际情况,通过对注水压力以及合理地层压力的研究,确定油组注采系统合理压力。

Because of the serious formation deficit in Nanyishan III＋IV oil group,its reservoir pressure is lower than the saturation pressure.If the reservoir energy can＇t be complemented timely,crude oil degassing,crude oil viscosity increasing,flow resistance increasing,and productivity index reducing will occur.For the actual situation during III＋IV oil group development process,it determines a reasonable pressure in injection system by studying injection pressure and reasonable reservoir pressure.