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Pentaerythritol encapsulated with boric acid: An efficient composite crosslinker for guar gum fracturing fluid
Author(s) -
Wang Chunnan,
Du Jing,
Liu Peisong,
Su Yuhang,
Li Xiaohong,
Zhang Zhijun
Publication year - 2020
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.48528
Subject(s) - guar gum , guar , boric acid , materials science , fracturing fluid , composite number , pentaerythritol , montmorillonite , chemical engineering , composite material , fire retardant , chemistry , organic chemistry , biochemistry , engineering
Commonly used crosslinker agents often have a low crosslinking efficiency with guar gum, the major component of fracturing fluid for crude oil recovery, and it often required a high loading of guar gum for achieving desired recovery from low‐permeability reservoir. Nevertheless, a high‐loading of guar gum might result in excessive residue and reduce the conductivity of the reservoir. Therefore, boric acid, a commonly used crosslinking agent, was introduced onto the surface of pentaerythritol to afford a composite crosslinking agent denoted as PB. The as‐prepared PB crosslinker was characterized by Fourier‐transform infrared spectrometry. The guar gum fracturing gel crosslinked with the PB had fantastic viscoelasticity and thermal stability and could reduce the guar gum loading by 16.7%, with boric acid as a control. Besides, the gel‐broken liquid had good compatibility with the simulated water and caused reduced damage to rock core, showing potential for hydraulic fracturing of low‐permeability reservoirs. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48528.