Hydrophobic‐associated polymer‐based laponite nanolayered silicate composite as filtrate reducer for water‐based drilling fluid at high temperature. Issue 18 (15th October 2019)

• Record Type: Journal Article
• Authors: Shen, Haokun; Lv, Kaihe; Huang, Xianbin; Liu, Jingping; Bai, Yingrui; Wang, Jintang; Sun, Jinsheng
• Is Part Of: Journal of applied polymer science. Volume 137:Issue 18(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-10-15
• Subjects: composite -- filtration -- hydrophobic association -- rheology -- water‐based drilling fluids; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.48608
• Languages: English
• ISSNs: 0021-8995

Abstract

ABSTRACT: Wellbore instability caused by water invasion is the main problem in oil and gas drilling operation. This study reports the utilization of a hydrophobic‐associated polymer‐based laponite nanolayered silicate composite as a filtrate reducer in water‐based drilling fluids (WDFs). The thermal performance and micromorphology of the composite were analyzed by thermogravimetric analysis, transmission electron microscope, and field emission scanning electron microscopy. The results indicated that the composite possessed a "bean pod" structure and a good thermal stability. The rheological properties of the composite solution were evaluated. The results showed that the hydrophobic association interaction of the composite is weak but existent, and the crosslink network structure is variable. The applied performances of WDFs containing the composite were also evaluated. Evaluation results showed that the composite could improve the properties of the thermal stability, salt tolerance, and fluid loss control of WDFs. The particle size distribution of WDFs and the micrographs of filter cakes explained the improving. The composite was expected to be applied as an efficient filtrate reducer for developing high performance drilling fluids. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48608. Abstract : The AADS@LP adsorbed on the clay surface and optimized the particle size distribution of WDFs. The AADS@LP made the clay particles stack tightly. Then, the AADS@LP micro/nanoparticles blocked the pores and cracks and form an isolation layer. A maze structure consisted of AADS@LP extend the path of invasion of water molecules. The nonpolar part of the DAAS molecule on the surface of the LP can prevent water molecules passing through the maze and the filter cake.