If macropore path once came into being,the water which was pumped into reservoir would be circling in low effect or even no effect.

• 注采过程中一旦形成大孔道,就会造成注入水长期无效或低效循环,不仅影响了油田可采油的动用程度,而且增加了开发成本。因此,必须加强对大孔道的识别及调剖。