Oil casing anticorrosion measures

1, first of all, pays special attention to the water quality standards, strict quality testing and management. Separate the clean-up, strengthen the work of cleaning the main water pipe, do on-site, bottom hole water quality standard, reducing corrosion source introduction of annular space;

2, for the new production of injection Wells, by adding the sterilization of annulus protection fluid, and form system, regular dosing;

3, in view of the mechanical abrasion of oil casing corrosion acceleration, Suggestions on the tubing coupling with a rubber ring or add a centralizer in serious deviation parts, to avoid in the process of operation process and water injection tubing scratch on one side and contact with casing pipe;

4, severe against bacteria corrosion and high temperature when SRB and kill, slow growth can be regularly to annulus injection to 100 degrees Celsius hot water or steam to kill of SRB;

5, in injection Wells casing corrosion before get effective control, the promotion by using cathodic protection and coating casing is not recommended.