低渗透油藏注水开发的生产特征及影响因素

Production characteristic and influencing factors in the waterflooding of lowpermeability oil reservoirs.

低渗透油藏注水困难的原因有低渗透非达西渗流视渗透率的变化、油水两相渗流的有效渗透率降低、地层压力降低所引起的压力敏感性伤害和注入水质不合格所引起的不配伍性伤害等。针对这些影响因素 ,阐明了改善低渗透油田注水开发效果的途径。

The apparent permeability change of lowpermeability nonDarcy percolating flow, the reduction in effective permeability of oilwater two phase percolation, the pressure sensitivity damage caused by the reduction in formation pressure, and the noncompatibility damage caused by water quality inferiority of the injected water and so on account for the difficulty on water injection in the lowpermeability oil reservoirs. A way of improving the development effect on the waterflooding of the lowpermeability oil reservoirs is expounded for these influencing factors.