Study on the Shale Hydration Inhibition Performance of Triethylammonium Acetate

Shale inhibitor is an additive for drilling fluids that can be used to inhibit shale hydration expansion and dispersion, prevent wellbore collapse. Small molecular quaternary ammonium salt enter the interlayer of clay crystal, enables excellent inhibition performance. In this paper, a novel ionic inhibitor, triethylammonium acetate (TEYA), was obtained by solvent-free synthesis using acetic acid triethylamine as raw materials. The final product identified target Fourier transform infrared spectroscopy (FT-IR). performance TEYA studied mud ball immersion test, linear rolling recovery test particle size distribution test. results demonstrated shows good mechanism FT-IR X-ray diffraction (XRD), respectively; showed could crystal layer it through physical adsorption.