%0 Journal Article
%T Preparation and Performance of the Hyperbranched Polyamine as an Effective Shale Inhibitor for Water-Based Drilling Fluid
%A Yuan Liu
%A Xiao Luo
%A Jianbo Wang
%A Zhiqi Zhou
%A Yue Luo
%A Yang Bai
%J Open Journal of Yangtze Oil and Gas
%P 161-174
%@ 2473-1900
%D 2021
%I Scientific Research Publishing
%R 10.4236/ojogas.2021.64014
%X Seeking effective solutions to control and mitigate the interaction between drilling fluids and clay formations has been a challenge for many years, and various shale inhibitors have shown excellent results in problematic shale formations around the world. Herein, the hyperbranched polyamine (HBPA) inhibitor with a higher ratio of amine groups and obvious tendentiousness in protonation was successfully synthesized from ethylenediamine, acryloyl chloride and aziridine by five steps, in which the metal-organic framework (MOF) was employed as a catalyst for ring-open polycondensation (ROP). The structure and purity were confirmed by nuclear magnetic resonance hydrogen spectroscopy and high-performance liquid chromatography (HPLC) respectively. The HBPA displays more excellent performance than EDA and KCl widely applied in the oil field. After aging at 80°C and 180°C, the YP of a slurry system containing 25 wt.% bentonite and 2 wt.% HBPA are just 8.5 Pa and 5.5 Pa (wt.%: percentage of mass), respectively. The swelling lengths of 2 wt.% HBPA are estimated to be 1.78 mm, which falls by 70% compared with that of freshwater. Under a hot rolling aging temperature of 180°C, the HBPA system demonstrates a significant inhibition with more than 85% shale cuttings recovery rate and is superior to conventional EDA and KCl. Mechanism analysis further validates that the HBPA can help to increase the zeta potential.
%K Water-Based Drilling Fluid
%K Inhibitors
%K Hyperbranched Polyamine
%K Metal Organic Framework Catalyst
%K Amine Groups
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=112700