Casing Repair Wells Fine Layering Water Injection Technology Research

From apricot north oilfield development initial stage to now, the late high water cut, oil field development work continued to deepen, the formation of the flow field and pressure field with great changes have taken place, because of the frequent measures, work over construction, oil and water Wells and well bore structure, pipe, corrosion, the quality of well completion, cementing quality, and many other factors, lead to deformation, rupture,perforation, fault broken casing damage phenomenon such as growing.The apricot north conventional well stratified water flooding technology can meet the requirements of geological development, can achieve the goal of fine layer water injection technology, but will not be possible to repair casing damage Wells stratified water flooding,because of the casing damage Wells after expansion pipe reinforcement process, the casing size reduced by 124 mm to 108 mm, with the deepening of the fine water flooding development, casing Wells is thin layers increase gradually, by the end of 2015, casing repair injection well of a total of 1571, which the layered well 693, 5.5 the average single well layer,containing more than 5 level interval of casing damage Wells is 515.This paper analysis and research on the mechanism of casing damage, and according to the casing damage Wells repair technology application in apricot north oil field, improve the fine layered water injection matching technology, Wells is solved the sealing load is high, the pull a little interlayer is out of the card, the adjacent two levels of eccentric distance is less than 4 m can’t accurately cast out of the test, Wells is implements the fine technical target of hierarchical development, meet the demand of the geological development.