CO2 Corrosion of Downhole Sand Control Screen: Experiments, Model, and Application

被引:1
|
作者
Zhou, Bo [1 ,2 ]
Dong, Changyin [1 ,2 ]
Li, Xiaobo [3 ]
Bai, Haobin [1 ]
Yin, Bin [1 ]
Li, Huaiwen [4 ]
Shen, Kaixiang [5 ]
机构
[1] China Univ Petr East China, Sch Petr Engn, Qingdao 266580, Peoples R China
[2] Minist Educ, Key Lab Unconvent Oil & Gas Dev, Qingdao 266580, Peoples R China
[3] China Oilfield Serv Ltd, Oilfield Optimizat Div, Tianjin 300451, Peoples R China
[4] Dagang Oilfield Petr Engn Inst, Tianjin 300280, Peoples R China
[5] China Geol Survey, Guangzhou Marine Geol Survey, Guangzhou 510075, Peoples R China
关键词
CO2; corrosion; sand control screen; corrosion experiments; corrosion evaluation method; corrosion life prediction; CARBON-DIOXIDE CORROSION; STEEL MICROSTRUCTURE; MECHANISTIC MODEL; STAINLESS-STEELS; BEHAVIOR; TEMPERATURE; PIPELINES; PRESSURE; OIL; PH;
D O I
10.3390/en17133316
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
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 degrees C. As CO2 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% CO2, 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.
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页数:22
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