Preparation and Properties of Temperature Resistant and Salt Resistant Lotion Fracturing Fluid Thickener

Rongsheng Gao; Yiping Cao; Chen Yu; Xianghui Zhang; Qi Liu; Lanbing Wu

doi:10.54097/m7hvyv77

Authors

Rongsheng Gao
Yiping Cao
Chen Yu
Xianghui Zhang
Qi Liu
Lanbing Wu

DOI:

https://doi.org/10.54097/m7hvyv77

Keywords:

Inverted emulsion polymerization; cellulose modification; thickener.

Abstract

In order to prepare fracturing fluid with excellent solubility, temperature resistance, salt resistance and shear resistance, acrylamide (AM), 2-acrylamide-2-methylpropanesulfonic acid (AMPS) and acryloylmorpholine (ACMO) were copolymerized, and anionic cellulose was introduced to synthesize a new type of polyacrylamide copolymer p (AM/AMPS/ACMO) through inverse emulsion polymerization. The structure and morphology were characterized by infrared spectroscopy and scanning electron microscope. The results showed that in 0, 5, 10, 20, 50, 100, 150 and 200 g/L NaCl, CaCl₂, and MgCl₂ solutions, the viscosity of p (AM/AMPS/ACMO) solution modified by PVA fiber was always higher than that of conventional PAM solution, and the polymer modified by PVA fiber had better salt resistance. The anionic cellulose modified thickener was sheared at 120 ℃ and 150 ℃ for 1 h at 170 s^－1, and the viscosity after shearing is 89.92 mPa·s and 80.10 mPa·s, respectively, which is much higher than the viscosity required by the general technical conditions of fracturing fluid more than 50 mPa·s, indicating that anionic cellulose modified p (AM/AMPS/ACMO) has good temperature and shear resistance.

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