Method for detecting corrosion of oil well casing by using SRB

The invention belongs to the technical field of corrosion prevention, and particularly relates to a method for detecting corrosion of an oil well casing through SRB. The method comprises the following steps: screening a test oil well; sRB selection is carried out; an SRB coating is determined; coating a detection rod; the sucker rod is lifted, a detection rod is put down, and standing is conducted; starting the detection rod and detecting the SRB concentration on the outer wall of the detection rod; and oil well casing corrosion condition determination and countermeasure. The screened and used SRB strain is wide in oil reservoir application range and suitable for high-temperature oil wells and medium-low-temperature oil wells, and the temperature range of the oil wells can be 20-85 DEG C; meanwhile, the method has the advantages of being simple in process, high in operability, high in precision and low in cost, the corrosion conditions of different positions of the oil well casing can be rapidly and accuratel