泡沫混排解堵技术研究与应用

针对生产过程中油井近井地层的堵塞问题研究了泡沫混排解堵技术。通过数值模拟分析了混排过程中泡沫对近井带的影响及其解堵机理，发现泡沫流体在注入过程中一定程度上影响了近井地层的含水饱和度，从而影响了岩石强度；泡沫放喷过程对孔道岩石的影响和连续的冲蚀作用使近井带的渗流条件得到了一定程度的改善。认为泡沫混排解堵主要是通过放喷阶段对射孔孔道的径向及其末端的水平扩展和近井地带的冲蚀作用而达到目的。该项技术在胜利油田应用，获得了很好的效果。

RESEARCH AND APPLICATION OF FOAM PLUG REMOVAL TECHNOLOGY

The foam plug removal technology is studied aimed at the chocking problem of near wellbore formations in the process of production.Numerical simulation analysis is used to study the impact of foam on near wellbore area in the process of foam plug removal and the mechanism.It is found that during injection，foamy fluid will to a certain degree influence water saturation in near wellbore formation，so it impacts intensity of rocks.During blowout，that foam impacts porous rocks and its continuous washing make the permeability adjacent wellbore area be improved.It is recognized that foam plug removal works mainly by means of the washing along perforation channel radial direction and horizontal extension at the end as well as the area adjacent wellbore.The technology is applied in Shengli Oilfield，and satisfactory consequence is achieved.