CASING PROTECTION MEASURES AND RESULTS OF ADJUSTMENT WELLS

Many wellblocks whose casing are damaged are found in Daqing oilfield in recent years.In these wellblocks,because of the large number of casing deformations,water-injection wells have to be shut off,which leads to the injection-production system is imperfect,the development result is poor,and the stable production is difficult.For this reason,to adjust the injection-production pattern of the casing defromation wellblock is imperative.However,whether the well can be drilled in these wellblocks and whether the newly drilled wells keep normal production for a long time are important problems in oilfield development.This paper analyses comprehensively the casing protection measures for more than three years of adjusting wells in casing deformation wellblocks in the north of Saertu,provides a practical experience for the casing proctection of adjusting wells in casing deformation wellblocks.