1.SINOPEC Research Institute of Petroleum Engineering,Beijing,100101;2.China
With the increasingly strict environmental protection regulations, environmental-friendly shale inhibitors with excellent inhibition are more and more valued by researchers. therefore. This article first discusses the mechanism of shale hydrated swelling and expansion, and then introduces the research status of environmentally friendly shale inhibitors at home and abroad in the past decade, including amine based, acrylamide-based, biomacromolecule-based, polyol-based, silicon-based shale inhibitor. The advantages and disadvantages of the inhibition capacity and toxicity of various inhibitors are compared and analyzed, and the future development trend of environmentally friendly inhibitors are discussed.