Abstract
Brittle fracture of cement sheath, induced by perforation and stimulation treatments, can cause cross flow of formation fluid and increase casing damage. A novel agent XL was developed for solving the problem. Experimental results showed that the toughness of the set cement containing XL was improved remarkably. The engineering properties of the slurry containing XL, drag reducer USZ (0.2% BWOC), filtrate loss additive F17B (1.2% BWOC) and crystalloid expanding agent F17A (3% BWOC) could meet technical requirements of cementing operation. After perforation, good quality cement sheath enhanced with XL was observed by CBL/VDL logs in a deep well.
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Hua Sudong was born in 1981 and received his MS degree from Nanjing University of Technology in 2007. He now is studying for his PhD degree in Nanjing University of Technology with his research interests in the additives of oil-well cement. E-mail: huasudong@163.com
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Sudong, H., Xiao, Y. Properties and application of oil-well cement enhanced with a novel composite toughening agent. Pet. Sci. 4, 52–59 (2007). https://doi.org/10.1007/BF03187442
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DOI: https://doi.org/10.1007/BF03187442