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Research On Cluster Well Group Casing Cathodic Protection For Field Test And Optimization Of Anode Bed

Picture for Research On Cluster Well Group Casing Cathodic Protection For Field Test And Optimization Of Anode Bed
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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.

Product Number: 51322-17724-SG
Author: Dawei Zhuang, Qian Zhao, Yanxia Du, Xiaoyong Wang, Qiongwei Li
Publication Date: 2022
Industries: Corrosion Monitoring and Control , Coatings and Linings , Coatings
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$20.00
$20.00

Cathodic protection (CP) is often used to protect steel well casings from external
corrosion. However, it is difficult to measure the CP potential distribution along the
well casing, which brings about difficulties on CP design and effectiveness evaluation.
In this paper, the polarization characteristics of casing steel in different soil layers were
obtained by polarization testing at different soil depths in the field. Based on measured
polarization characteristics, geometry of well casing and soil resistivities of different
soil layers, a numerical simulation model for CP of well casing was established. CP
current requirement and CP potential distribution of well casings were estimated by
calculating and field testing. Additionally, the effects of soil resistivity and casing
polarization characteristics on CP potential distribution of well casing were studied by
numerical simulation.

Cathodic protection (CP) is often used to protect steel well casings from external
corrosion. However, it is difficult to measure the CP potential distribution along the
well casing, which brings about difficulties on CP design and effectiveness evaluation.
In this paper, the polarization characteristics of casing steel in different soil layers were
obtained by polarization testing at different soil depths in the field. Based on measured
polarization characteristics, geometry of well casing and soil resistivities of different
soil layers, a numerical simulation model for CP of well casing was established. CP
current requirement and CP potential distribution of well casings were estimated by
calculating and field testing. Additionally, the effects of soil resistivity and casing
polarization characteristics on CP potential distribution of well casing were studied by
numerical simulation.

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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 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
$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.
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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