In situ synthesis,structure, and properties of a dendritic branched nano-thickening agent for high temperature fracturing fluid |
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| Authors: | Jun Tang Haibo Li Shengdong Yan Siming Yan |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, 610500 Sichuan, China;2. Northwest Sichuan Gas Mine, PetroChina, Southwest Oil and Gas Field Branch, Mianyang, 621000 Sichuan, China |
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| Abstract: | The aim of this work was to prepare a novel dendritic branched nano-thickening agent by free radical polymerization of acrylamide (AM), acrylic acid (AA), sodium p-styrene sulfonate, dimethyl diallyl ammonium chloride, and multiwalled carbon nanotubes. The as-synthesized nano-thickening agent was characterized by Fourier transform infrared, Raman spectra, transmission electron microscope, 1H-NMR, and thermogravimetric analysis (TGA). Compared with the pristine polymer and partially hydrolyzed polyacrylamide (HPAM), thickening capacity, temperature resistance, and salt tolerance properties of the nano-thickening agent considerably improved, and the viscosity of 0.5% nano-polymer solution was 126.5 mPa·s. Additionally, the properties of the nano-gel prepared by nano-thickener, such as temperature and shear tolerance, viscoelasticity, sand carrying capacity, and gel breaking performance, were evaluated showing the satisfactory performance of the nano-gel under high temperature condition. The results indicated that the nano-thickener has potential applications in the field of oil and gas production. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137, 48446. |
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| Keywords: | fracturing fluid in situ polymerization multiwalled carbon nanotubes nano-thickening agent rheology |
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