Anticorrosion Countermeasures for Oil Casing
1. First of all, do a good job of water quality standards, and strictly monitor and manage water quality. Implement cleaning and separate injection, strengthen the cleaning of the main water pipeline, ensure that the water quality in the station and the bottom of the well meets the standard, and reduce the introduction of corrosion sources into the annular space;
2. For the water injection wells that have been newly put into production, the annular protective fluid mainly used for sterilization shall be added, and a system shall be formed to add it regularly;
3. In view of the accelerated effect of mechanical abrasion on the corrosion of oil casing, it is recommended to add a rubber ring to the tubing coupling or add a centralizer to the serious part of the well deviation to avoid the tubing from scratching the casing during operation and water injection. one side contact sleeve;
4. In view of the serious bacterial corrosion under the scale and the slow growth and killing of the SRB at high temperature, high temperature water or steam of 100 degrees Celsius can be injected into the annular space regularly to kill the SRB under the scale;
5. Before the corrosion in the casing of the water injection well is effectively controlled, it is not recommended to promote the use of cathodic protection and coating casing
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