Application of IPPA Acid in Changqing Oil Field Broken down Process

In view of low permeability, severe nonhomogeneity, the high content of chlorite and the bad acid effect, the original triturates IPPA acid and additive were applicated to resolve the problem of Changqing oil field aciding effect. The results indicated that IPPA acid system could raise the aciding retardant and prevented the second deposit, and enhanced the aciding effect. Thirteen wells′deep aciding were conducted, the success rate was 90%, acquired good effect.