Cellulose nanofibril-polymer hybrids for protecting drilling fluid at high salinity and high temperature

Xiongli Liu; Zhaoyang Yuan; An Wang; Chunping Wang; Jialei Qu; Bin Chen; Bing Wei; Nuwan Sella Kapu; Yangbing Wen

doi:10.1016/j.carbpol.2019.115465

Cellulose nanofibril-polymer hybrids for protecting drilling fluid at high salinity and high temperature

Carbohydr Polym. 2020 Feb 1:229:115465. doi: 10.1016/j.carbpol.2019.115465. Epub 2019 Oct 19.

Authors

Xiongli Liu¹, Zhaoyang Yuan², An Wang¹, Chunping Wang¹, Jialei Qu¹, Bin Chen³, Bing Wei⁴, Nuwan Sella Kapu⁵, Yangbing Wen⁶

Affiliations

¹ Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457, China; Tianjin Woodelf Biotechnology Co. Ltd., Tianjin, 300457, China.
² Department of Biochemistry & Molecular Biology, Michigan State University, 603 Wilson Road, East Lansing, MI, 48824, United States. Electronic address: yuanzha2@msu.edu.
³ CNOOC Drilling & Production Technology Research Institute, Tianjin, 300457, China.
⁴ State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, Sichuan, China.
⁵ Department of Chemical & Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC, V6T 1Z4, Canada.
⁶ Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, Tianjin, 300457, China; Tianjin Woodelf Biotechnology Co. Ltd., Tianjin, 300457, China. Electronic address: yangbingwen@tust.edu.cn.

PMID: 31826464
DOI: 10.1016/j.carbpol.2019.115465

Abstract

A copolymer (PADH) was first synthesized from 2-acrylamido-2-methylpropane sulfonic acid (AMPS), N,N-dimethylacrylamide (DMA), and 2-Hydroxyethyl acrylate (HEA) by UV-induced polymerization. Subsequently, cellulose nanofibrils (CNFs) were introduced into the copolymer through ironic cross-linking between ferric ions and carboxylate groups as well as sulfonic acid groups to produce a hybrid product (PADHC-Fe³⁺-3). The salt tolerance and thermal stability of the copolymers and the hybrid product were investigated. The results showed that the optimum HEA dosage was 5% (in relation to the total mass of AMPS and DMA). In addition, the fluid loss test showed that the hybrid product PADHC-Fe³⁺-3 had excellent salt tolerance (maximum tolerance: 26.5 wt% NaCl and 32 wt% combined salts) and thermal stability (maximum tolerance: 200 °C). The SEM images indicated that the filter cakes became denser after the addition of PADHC-Fe³⁺-3. The results demonstrated that the cross-linked hybrid product was very promising for industrial application in drilling engineering.

Keywords: Cellulose nanofibril; Drilling engineering; Filtrate reducer; Hybrid polymer; Salt tolerance; Ternary copolymerization; Thermal stability.