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Storage Well Cathodic Protection Comparative Assessment

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When two long-time operators of natural gas storage wells in southwestern Ontario merged, it was an opportune time for the combined company to evaluate the effectiveness and impact of cathodic protection (CP). Staff from both legacy operators expressed general satisfaction with the longevity of their storage wells, typically 30+ years, but they had relied on two different approaches to corrosion control: one had isolated wells from flowlines and operated without CP, while the second had resistively bonded wells to cathodically protected flowlines. For the second operator, typical well currents were in the range of ~3 A.

Product Number: 51322-17647-SG
Author: Daniel Fingas, Jean-Patrick Boudreault, Bradley Jefferies
Publication Date: 2022
Industries: Corrosion Monitoring and Control , Coatings
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$20.00
$20.00

The long-term service life outcomes were compared for similar natural gas storage wells operated with either no cathodic protection or partial cathodic protection. Cathodic protection for storage wells is not mandated by regulation and industry practice varies so the outcomes for more than 350 wells were assessed based on casing inspection logs, historical failure rates and service lives. Casing inspection logs indicated a higher prevalence of external corrosion on the wells without cathodic protection. Furthermore, of the wells that had been remediated/abandoned, those operated with partial cathodic protection were found to have increased service lives when compared with the wells operated without cathodic protection. A higher percentage of the wells operated without cathodic protection also required remediation/abandonment. Overall, the data supported a conclusion that partial cathodic protection lead to improved service life outcomes and reduced external corrosion.

The long-term service life outcomes were compared for similar natural gas storage wells operated with either no cathodic protection or partial cathodic protection. Cathodic protection for storage wells is not mandated by regulation and industry practice varies so the outcomes for more than 350 wells were assessed based on casing inspection logs, historical failure rates and service lives. Casing inspection logs indicated a higher prevalence of external corrosion on the wells without cathodic protection. Furthermore, of the wells that had been remediated/abandoned, those operated with partial cathodic protection were found to have increased service lives when compared with the wells operated without cathodic protection. A higher percentage of the wells operated without cathodic protection also required remediation/abandonment. Overall, the data supported a conclusion that partial cathodic protection lead to improved service life outcomes and reduced external corrosion.

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Picture for Well Casing Cathodic Performance Review - Case Studies
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Well Casing Cathodic Performance Review - Case Studies

Product Number: 51322-17688-SG
Author: Maryam Al Hashmi, Monica Fernandez, Hamed Al Habsi, Naveed Munir, Fatih Boluk
Publication Date: 2022
$20.00

Oil and gas wells represent a large capital investment. It is imperative that corrosion of well casings be controlled to prevent loss of oil and gas, environmental damage, and personnel hazards, and in order to ensure economical depletion of oil and gas reserve. Wells placed in external corrosive environment shall be protected by appropriate barriers such as additional cemented casing, cathodic protection and coating to assure well casing integrity.
Picture for 03201 WELL CASING CATHODIC PROTECTION EVALUATION
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03201 WELL CASING CATHODIC PROTECTION EVALUATION PROGRAM IN THE SPRABERRY (TREND AREA) FIELD

Product Number: 51300-03201-SG
ISBN: 03201 2003 CP
Author: Clay Brelsford, Craig A. Kuiper, Carl Rounding
Publication Date: 2003
$20.00

Several well casings were selected as candidates for down hole inspection logs to determine if cathodic protection could be a solution to the external corrosion problem. "Test" cathodic protection systems were installed.  Based on logging results and economic evaluation, implementation of a cathodic protection pilot project commenced.
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51318-10655-Well Casing CP - Design Issues & Case History

Product Number: 51318-10655-SG
Author: Jeffrey L. Didas
Publication Date: 2018
$20.00

Design issues with well casing Cathodic Protection - CP. Need for and benefits of CP discussed. Case history dealing with design issues and what solutions were available and utilized.
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