A STUDY OF INJECTION TECHNOLOGY AND EFFECT MONITORING OF CORROSION INHIBITOR CT2-4 AT WELL FENG-7 IN EAST SICHUAN

The corrosion preventing technology by using corrosion inhibitor is of great significance for resolving the corrosion prevention problem in oil and gas fields.In recent years,different types of the inhibitors used in oil and gas fields have been developed,obtaining a good result,but the investment in the research on practical use of inhibitor in production,optimum injection volume,state of inhibitor in downhole,applied surroundings and protection effect,etc.,was very few,thus,the knowledge of these factors was relatively superficial,which seriously restricted the further research on the inhibitor and its wide application and made working out the corrosion preventing plan have a certain blindness and the corrosion prevention problem more complicated.For resolving this problem,the practicable injection volume of the inhibitor,the effective protection period for production casing and the controlling concentration of the inhibitor in medium,etc.were deduced by using the method of combining the residual concentration of the inhibitor with the results of corrosion coupon.Through experiment,some new understandings of applied technique of the inhibitor have been obtained,to expect giving a reference to the research on the corrosion preventing applied technique by using the inhibitor;and a reference to working out the corrosion preventing plan.