Quantification of Shrinkage-Induced Cracking in Oilwell Cement Sheaths

被引:0
作者
Alberdi-Pagola P. [1 ]
Fischer G. [1 ]
机构
[1] Civil and Mechanical Engineering, Technical University of Denmark
关键词
D O I
10.2118/214685-PA
中图分类号
学科分类号
摘要
Ensuring the zonal isolation of hydrocarbon reservoirs is one of the main tasks of the cement sheath, but the development of cracks and debonding between the interfaces might lead to underground water pollution and leaks of oil and gas to the environment. Restrained shrinkage of the cement sheath is one of the most significant causes of cracking, and an experimental investigation has been conducted to quantify how extensive shrinkage-induced cracking might be due to changes in ambient humidity conditions, confinement levels, and mixture compositions. The presence of lateral confinement due to the presence of shale provided an 80% reduction in the cracked area compared to unconfined specimens, but still radial cracks as wide as 200 µm, microannuli up to 100 µm, and cracked areas of 50 mm2 in a representative well section were observed. Additionally, a reduction in crack widths and potential leak paths was obtained by reinforcing the cement slurry with synthetic fibers. A detailed quantification of shrinkage-induced cracking is reported in this study, providing crack information such as position, width, and orientation as a function of time. © 2023 Society of Petroleum Engineers.
引用
收藏
页码:469 / 485
页数:16
相关论文
共 24 条
[1]  
Alberdi-Pagola P., Fischer G., Review of Integrity Loss Detection and Quantification Due to Cracking in Cemented Wells, SPE J, 28, 3, pp. 965-982, (2023)
[2]  
Alberdi-Pagola P., Marcos-Meson V., Paegle I., Et al., Quantitative Analysis of Restrained Shrinkage Cracking in Oilwell Cement Using Digital Image Correlation, SPE J, 28, 2, pp. 496-508, (2023)
[3]  
Allena S., Newtson C. M., State-of-the-Art Review on Early-Age Shrinkage of Concrete, Indian Concr J, 85, pp. 14-20, (2011)
[4]  
Recommended Practice For Testing Well Cements, (2013)
[5]  
Specification for Steel Wire, High Tensile Strength, Cold Drawn, 1, pp. 1-4, (2012)
[6]  
Standard Specification for Liquid Membrane-Forming Compounds for Curing Concrete 1, 6, pp. 8-10, (2015)
[7]  
Standard Test Method for Determining Age at Cracking and Induced Tensile Stress Characteristics of Mortar and Concrete under Restrained Shrinkage, pp. 1-7, (2009)
[8]  
Backe K. R., Skalle P., Lille O. B., Et al., Shrinkage of Oil Well Cement Slurries, J Can Pet Technol, 37, 9, pp. 63-67, (1998)
[9]  
Carter L. G., Evans G. W., A Study of Cement-Pipe Bonding, J Pet Technol, 16, 2, pp. 157-160, (1964)
[10]  
Dall'Acqua D., Hodder M., Kaiser T. M. V., Burst and Collapse Responses of Production Casing in Thermal Applications, SPE Drill & Compl, 28, 1, pp. 93-104, (2013)