NON-TOXIC, SHALE INHIBITIVE WATER-BASED WELLBORE FLUID

摘要

A wellbore fluid may include an aqueous base fluid; a natural amine having at least one amine group and at least a C3 oleophilic backbone; and an unmodified biopolymer viscosifier, wherein the natural amine and the biopolymer viscosifier are present in an amount such that at least 75% of the original concentration of each of the natural amine and the biopolymer results in a 50% decrease in light output of Vibrio fischeri upon exposure to the natural amine and the biopolymer viscosifier or the greatest percentage of effect in light output of Vibrio fischeri is a reduction that is less than a 50% decrease in light output, or the natural amine or biopolymer trigger hormesis.