Abstract
In view of the serious scale and blockage in Chang 2 reservoir of a certain oil production plant, in recent years, based on the scientific and technological project “Acidification technology test of Chang 2 reservoir in XX-YY District” completed in 2013, a series of blockage removal workers suited to different blockage characteristics in this area have been formed by studying and analyzing a large number of indoor data, optimizing the acidification formula. The dosage of additives is increased, thus protecting oil pipes, rods and pumps, and preventing new pollution caused by precipitation of Ca2+, Mg2+. In view of the specific situation of reservoir blockage, 222 wells have been carried out with various blockage removal measures, such as compound acidification, blockage removal and so on. The cumulative oil increase is 7894.8 tons, with an average of 38.7 tons per well, which has made a positive contribution to the stable production of oil production plants
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