Reason Analysis for Injection Well Clogging and the Measures to Breaking down Plugging in SZ36-1 Oil Field

The injection pressure is generally higher in the injection wells of SZ36-1 oil field, resulting in decreasing in water injection, and decline in formation energy, and the oil field development has also been affected. The main reason for injection well pressure rise in SZ36-1 oil field is the formation plugging. In this paper, the main three reasons for injection well clogging in SZ36-1 oilfield have been discussed, including the water quality, reservoir sensitivity and process measures, and the measures to remove the clog of injection wells in SZ36-1 oil field have been put forward. With D17 well and E7 well in SZ36-1 oil field as an example, the effectiveness of fluo boric acid system in removing the clog of injection wells has been discussed.