Methanesulfonic acid-ammonium hydrogen fluoride acid liquid system and preparation method and application thereof

The invention provides a methanesulfonic acid-ammonium hydrogen fluoride acid liquid system. The acid liquid system is prepared from components, by weight of 100 g of the solution, as follows: 1-95.6 g of methanesulfonic acid, 0.6-3 g of ammonium hydrogen fluoride, 0.6-3 g of organic acid, 0.15-0.2 g of a ferrous stabilizer, 0.5 g of a discharge aiding agent for acidification, 0.5 g of a foaming agent, 0.5 g of a clay stabilizer, 1.5-2 g of a corrosion inhibitor for acidification, 0.05-0.1 g of a composite scale inhibitor and the balance of solvent water. The provided methanesulfonic acid-ammonium hydrogen fluoride acid liquid system has good corrosion capability, has a certain retardance effect, a deep acidification function on a reservoir and a protection function on an underground tubular column and also has a good anti-scaling function.