Application of Continuous Pipe Spray Unplugging Technology in Water Injection Wells
Aker2 well in Wucia structural belt of Tarim Basin mainly reinjected formation water produced from Akermom gas field.Due to the substandard treatment of formation water,the water injection wellbore and the formation were blocked,so that the injec-tion well could not complete the injection requirements,and the continuous pipe was needed for in-pipe unblocking construction.The Φ 44.45 mm continuous pipe was used to work out the scheme of high pressure jet and drilling and grinding to unblock and clear the blockage in the tubing.After calculation of hydraulic parameters,optimization of nozzles and optimization of downhole tool string,the suitable high pressure jet tool string and drilling and grinding tool string were determined.In order to ensure the jet speed and jet impact force,we continuously improve the liquid performance,reduce the liquid wear resistance,increase the con-struction displacement,meet the jet flushing effect,and thus successfully removes the blockage in the tubing,and achieves the ex-pected operation purpose.This process provides a technical scheme and experience for the subsequent plugging removal of water in-jection wells.
Tarim Basincontinuous tubejet unpluggingdrill and grind to remove plugging
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