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Quantitative characterization of the crosslinking degree of hydroxypropyl guar gum fracturing fluid by low-field NMR.
Zhang, Chuanbao; Wang, Yanling; Yin, Zichen; Yan, Yujie; Wang, Ziyue; Wang, Hangyu.
Afiliación
  • Zhang C; Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, PR China; College of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, PR China.
  • Wang Y; Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, PR China; College of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, PR China. Electronic address: wangyl@upc.edu.cn.
  • Yin Z; Jinan Vocational College, Jinan 250103, PR China.
  • Yan Y; Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao 266580, PR China; College of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, PR China.
  • Wang Z; The University of North Carolina at Chapel Hill, 216 Lenoir Dr, Chapel Hill NC27599, USA.
  • Wang H; The University of North Carolina at Chapel Hill, 216 Lenoir Dr, Chapel Hill NC27599, USA.
Int J Biol Macromol ; 277(Pt 3): 134445, 2024 Oct.
Article en En | MEDLINE | ID: mdl-39098685
ABSTRACT
As a widely used water-based fracturing fluid, the performance of hydroxypropyl guar gum fracturing fluid is closely related to the degree of crosslinking, the quantitative characterization of which can reveal a detailed crosslinking mechanism and guide the preparation of fracturing fluid gels with an excellent performance. However, the commonly used high-temperature rheology method for evaluating the performance of fracturing fluids only qualitatively reflects the degree of crosslinking. In this study, low-field nuclear magnetic resonance (LF-NMR) was used to characterize the degree of crosslinking in guar gum fracturing fluid gels. The spin-spin relaxation time of the H proton in guar gum was molecularly analyzed using LF-NMR. The viscoelastic properties met the requirements when the crosslinking degree of the gel was 88-94 %. The transformation of the linear structure into a membrane structure during the crosslinking process of the guar gum fracturing fluid was confirmed by freeze-drying and scanning electron microscopy (SEM) from a microscopic perspective. The changing trend of the microstructure and viscoelastic properties of the fracturing fluid gel under different crosslinker dosages was consistent with changes in the degree of crosslinking. The LF-NMR test process is non-destructive to the gel structure, and the test results demonstrate good accuracy and repeatability.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Espectroscopía de Resonancia Magnética / Gomas de Plantas / Galactanos / Mananos Idioma: En Revista: Int J Biol Macromol Año: 2024 Tipo del documento: Article Pais de publicación: Países Bajos
Texto completo
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Imprimir
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Espectroscopía de Resonancia Magnética / Gomas de Plantas / Galactanos / Mananos Idioma: En Revista: Int J Biol Macromol Año: 2024 Tipo del documento: Article Pais de publicación: Países Bajos