Abstract: Aiming at the high heterogeneous carbonate reservoir of Gaomo area in Sichuan basin, different types of diverting acid conductivity are studied by acid concentration, reservoir temperature, acid injection displacement, acid consumption and so on. The experimental results show that: the conductivity of acid corrosion fracture formed by viscoelastic diverting acid system with high acid concentration is higher than that of viscoelastic diverting acid system with low acid concentration under the same conditions; with the increase of acid concentration, reservoir temperature, acid injection displacement and acid dosage, the conductivity of acid corrosion fracture increases continuously. But when the acid concentration is greater than 20%, the increase of conductivity of acid corrosion fracture is limited, which can effectively guide the acidizing construction design. The field application is carried out in Gaomo area by using the diversion ability of steering acid, and the high conductivity is realized. The test gas production is 80.01×10⁴ m³/d.