SHALE INHIBITORS USED IN THE WATER-BASED FLUID FOR SHALE FORMATION

摘要

A shale inhibitor to improve the application of water-based drilling fluid in the shale formation rock is provided. An embodiment of the shale inhibitor is the reaction product of an amine, such as triethanolamine, and epichlorihydrin in water solution. Another embodiment of the shale inhibitor is the reaction product of triethanolamine, epichlorihydrin, and hypophosphorous acid. It is highly effective and has a better performance than most commercial products on preventing the disintegration and swelling of the shale formation.