Solid-free high-density acid-resistant completion fluid as well as preparation method and application thereof

The invention provides a solid-free high-density acid-resistant well completion fluid and a preparation method and application thereof.The density range of the solid-free high-density acid-resistant well completion fluid is 1.60-2.11 g/cm < 3 >, the solid-free high-density acid-resistant well completion fluid comprises a weighting agent and water, the weighting agent comprises potassium formate and cesium formate, and the mass ratio of the potassium formate to the water is 32: 10-33: 10. The density range of the solid-free high-density acid-resistant well completion fluid provided by the invention is adjustable within 1.60-2.11 g/cm < 3 >, the solid-free high-density acid-resistant well completion fluid can stably exist for 72 hours under the temperature condition of 180 DEG C after being mixed with acid liquor according to the volume ratio of not less than 1: 1, no precipitate is generated, and the solid-free high-density acid-resistant well completion fluid has good adaptability. 本发明提供了一种无固相高密度耐酸完井液及其制备方法与应