CO 2 Corrosion of Downhole Sand Control Screen: Experiments, Model, and Application

Bo Zhou, Changyin Dong (), Xiaobo Li, Haobin Bai, Bin Yin, Huaiwen Li and Kaixiang Shen
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Bo Zhou: School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
Changyin Dong: School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
Xiaobo Li: Oilfield Optimization Division, China Oilfield Services Limited, Tianjin 300451, China
Haobin Bai: School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
Bin Yin: School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China
Huaiwen Li: Dagang Oilfield Petroleum Engineering Institute, Tianjin 300280, China
Kaixiang Shen: Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, China

Energies, 2024, vol. 17, issue 13, 1-22

Abstract: Under simulated conditions typical of a high-temperature, high-pressure (HTHP) oil and gas reservoir in the South China Sea, dynamic corrosion evaluation experiments were performed on a three-layer screen structure and three types of sand retaining media. The results showed significant variations in corrosion morphology and rates among different screen components and materials. Corrosion products on the base pipe accumulated as cubic crystals, while the protective shroud showed surface needle-like corrosion products. Sand retaining media exhibited “coiled wire” corrosion products with cubic accumulations along seam edges. The 316L media showed a high corrosion risk, especially at temperatures between 140–150 °C. As CO 2 partial pressure increased, corrosion rates generally rose. A new predictive method was developed to assess and compare the corrosion resistance and life of screens, achieving a compliance rate of over 90%. This method supports evaluating the corrosion life of screens in HTHP environments. For a typical well in the South China Sea gas field with 4% CO 2 , there is a high risk of screen corrosion. The screen media was identified as a failure site with a minimum corrosion life of about 5 years, while the protective shroud’s life was estimated at 11–12 years.

Keywords: CO 2 corrosion; sand control screen; corrosion experiments; corrosion evaluation method; corrosion life prediction (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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