TECHNOLOGY OF SEPARATED ZONAL FORMATION POLYMER DRIVE COMBINED WITH MECHANICAL PLUGGING

In fact, the polymer drive and plugging technology requires down hole tools with high working pressure, long working life and easy to set and release. From this view, the paper describes a technical principle, field test and improvement of separated zonal formation polymer drive combined with mechanical plugging. Based on summarization of the lab and field test result, it is believed that the technology can meet the plugging need of thinner formations with large intervals. It fits the need of both polymer drive and compound drive. It can be used to drive upper layer section by plugging lower layer section or to drive lower layer section by plugging upper layer section. At present, it is one of the most reliable technologies in the scope of zonal polymer drive section change by mechanical plugging.