文献类型：期刊文献

英文题名：Rheological Performance of High-Temperature-Resistant, Salt-Resistant Fracturing Fluid Gel Based on Organic-Zirconium-Crosslinked HPAM

作者：Xin, Hui[1];Fang, Bo[1];Yu, Luyao[1];Lu, Yongjun[2];Xu, Ke[2];Li, Kejing[1]

机构：[1]East China Univ Sci & Technol, Res Ctr Chem Engn, Shanghai Key Lab Multiphase Mat Chem Engn, Lab Chem Engn Rheol, Shanghai 200237, Peoples R China;[2]China Petr Explorat & Dev Res Inst, Beijing 100083, Peoples R China

年份：2023

卷号：9

期号：2

外文期刊名：GELS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000945099700001)】；

基金：This research was funded by the China's National Science and Technology Major Project, project number 2017ZX05023003, the Petrochina Science and Technology Management Department Project, project number 2020B-4120, and the National Natural Science Foundation of China, grant number 51834010.

语种：英文

外文关键词：HPAM; fracturing fluid gel; high-temperature-resistant; salt-resistant; rheological analysis; zirconium crosslinker; molecular dynamics simulation

摘要：Development of low-cost, high-temperature-resistant and salt-resistant fracturing fluids is a hot and difficult issue in reservoir fluids modification. In this study, an organic zirconium crosslinker that was synthesized and crosslinked with partially hydrolyzed polyacrylamide (HPAM) was employed as a cost-effective polymer thickener to synthesize a high-temperature-resistant and salt-resistant fracturing fluid. The rheological properties of HPAM in tap water solutions and 2 x 10(4) mg/L salt solutions were analyzed. The results demonstrated that addition of salt reduced viscosity and viscoelasticity of HPAM solutions. Molecular dynamics (MD) simulation results indicated that, due to electrostatic interaction, the carboxylate ions of HPAM formed an ionic bridge with metal cations, curling the conformation, decreasing the radius of rotation and thus decreasing viscosity. However, optimizing fracturing fluids formulation can mitigate the detrimental effects of salt on HPAM. The rheological characteristics of the HPAM fracturing fluid crosslinking process were analyzed and a crosslinking rheological kinetic equation was established under small-amplitude oscillatory shear (SAOS) test. The results of a large-amplitude oscillation shear (LAOS) test indicate that the heating effect on crosslinking is stronger than the shear effect on crosslinking. High-temperature-resistant and shear-resistant experiments demonstrated good performance of fracturing fluids of tap water and salt solution at 200 degrees C and 180 degrees C.