LOW ELECTRICAL CONDUCTIVITY INHIBITORS AND THEIR PREPARATION METHODS, AND DRILLING FLUIDS CONTAINING LOW ELECTRICAL CONDUCTIVITY INHIBITORS

Abstract

The present invention provides a low electrical conductivity inhibitor and a method for preparing said inhibitor, as well as a drilling fluid containing said low electrical conductivity inhibitor. The method for preparing said low electrical conductivity inhibitor comprises: mixing a tertiary amine and an epoxy coupling agent, carrying out a reaction under a first heating, cooling and then adding a terminator, and carrying out a second heating and then adding a conditioning agent to obtain a low electrical conductivity inhibitor.The drilling fluid containing the inhibitor can overcome the technical problem that the existing brine drilling fluids have high electrical conductivity which affects the evaluation results of low resistivity oil layers from array induction logging on the oil layers, and meet the requirements of low electrical conductivity of drilling fluids, collapse prevention, and environmental friendliness.