Microbiologically Induced Corrosion Observed During Downhole Corrosion Inhibitor Trials

ABSTRACT The environmental conditions during downhole crude oil production can be very corrosive to the tubing string due to the presence of acid gases (such as CO2. During the last two decades many of the production wells have developed high water cuts (in the range of 30 to 50%), and they also hav...

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Bibliographic Details
Published inNACE International Corrosion Conference Proceedings pp. 1 - 14
Main Authors Islam, Moavin, Prakash, Surya, Jarragh, Amer, Abraham, Shibu
Format Conference Proceeding
LanguageEnglish
Published Houston NACE International 01.01.2019
Subjects
Bacteria
Carbon dioxide
Corrosion
Corrosion inhibitors
Corrosion products
Crude oil
Discount coupons
Gases
Laboratories
Monitoring systems
Stainless steel
Stainless steels
Weight loss measurement
Kuwait
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Summary:ABSTRACT The environmental conditions during downhole crude oil production can be very corrosive to the tubing string due to the presence of acid gases (such as CO2. During the last two decades many of the production wells have developed high water cuts (in the range of 30 to 50%), and they also have 2-3% of carbon dioxide (CO2) content resulting in corrosive downhole conditions. Since the early 2000's several downhole tubular failures have been documented. Attached to the DCMS probe assembly is a another 4-ft (1.20 m) stainless steel tubular section with provisions for installing up to 12 weight loss strip coupons each measuring (2.63 x 0.50 x 0.07) inch (6.67 x 1.28 x 0.17) cm. Corrosion data was collected under in-situ downhole operating conditions with the help of the Downhole Corrosion Monitoring System (DCMS) described above, using the ER-probe component as well as the coupon holder component with coupons fabricated from L-80 alloy.