Temperature-resistant thixotropic agent, and preparation method and use thereof

Abstract

The present disclosure relates to a temperature-resistant thixotropic agent, and a preparation method and use thereof. The present disclosure subjects diutan gum to graft modification using acrylic acid and N-vinylpyrrolidone to obtain modified diutan gum; the modified diutan gum is compounded with magnesium aluminum silicate to prepare the temperature-resistant thixotropic agent. The temperature-resistant thixotropic agent prepared according to the present disclosure can significantly enhance the thixotropic properties of magnesium oxychloride cement (MOC) under the high-temperature conditions encountered in oil and gas wells, effectively improve the rheological properties of the cement slurry, enhance the retention capacity of the cement slurry within fractures, and improve the plugging stability, among other improvements. This agent demonstrates broad application prospects in oil and gas well engineering and constitutes an effective solution to the challenge of lost circulation in fractured formations during oil and gas well drilling.

Dependencies are inferred from the claim text.