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Well Casing Cathodic Performance Review - Case Studies

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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.

Product Number: 51322-17688-SG
Author: Maryam Al Hashmi, Monica Fernandez, Hamed Al Habsi, Naveed Munir, Fatih Boluk
Publication Date: 2022
Industries: Corrosion Monitoring and Control , Coatings and Linings , Coatings
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$20.00
$20.00

Assessing the Cathodic Protection (CP) performance of well casing is part of well casing Corrosion Management to ensure its integrity. CP is essential in managing well casing integrity by mitigating external corrosion, preventing well casing leaks, reducing operating/capital costs and maximizing total production over the life cycle.

Petroleum Development Oman (PDO) has reviewed the corrosion management strategy to ensure proper mitigation of well casings external corrosion in several clusters. This paper will detail the review process followed for two clusters; which included: i) confirmation of total amount of wells (with and without CP) within the clusters, ii) re-visit the requirement of external protection for well casings without CP, iii) identify historical failures relevant to external corrosion in well casing (with and without CP) to confirm barrier effectiveness and/or future requirement, iv) assessment of CP performance (protection level, cause of failure / lack of protection and recommendation for reinstatement).

Assessing the Cathodic Protection (CP) performance of well casing is part of well casing Corrosion Management to ensure its integrity. CP is essential in managing well casing integrity by mitigating external corrosion, preventing well casing leaks, reducing operating/capital costs and maximizing total production over the life cycle.

Petroleum Development Oman (PDO) has reviewed the corrosion management strategy to ensure proper mitigation of well casings external corrosion in several clusters. This paper will detail the review process followed for two clusters; which included: i) confirmation of total amount of wells (with and without CP) within the clusters, ii) re-visit the requirement of external protection for well casings without CP, iii) identify historical failures relevant to external corrosion in well casing (with and without CP) to confirm barrier effectiveness and/or future requirement, iv) assessment of CP performance (protection level, cause of failure / lack of protection and recommendation for reinstatement).

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Picture for Well Casing CP - Design Issues & Case History
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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
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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.
Picture for Research On Cluster Well Group Casing Cathodic Protection For Field Test And Optimization Of Anode Bed
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Research On Cluster Well Group Casing Cathodic Protection For Field Test And Optimization Of Anode Bed

Product Number: 51322-17724-SG
Author: Dawei Zhuang, Qian Zhao, Yanxia Du, Xiaoyong Wang, Qiongwei Li
Publication Date: 2022
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Deep well casing is an important part of oilfield production. In the long service life of well casing, corrosion can result in wall thinning and even perforation of the casing due to contacting with soil, water and other naturally occurring substances within the formation. The most economic and effective method to decrease corrosion of well casing is cathodic protection (CP). However, the vertical depth of casing is several kilometers, and CP current requirements of casing in different layers are quite different. At the same time, the conductivity of different formations will affect the distribution of CP current.
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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