Abstract: It's difficult to inject water in low-permeability zone, and a set of tests about petroleum sulfonate such as solvability, surface tension variety and core test were carried out to examine its effects on depressur-ization and augmented injection. Also scaling and corrosion experiments were developed to test whether wa-ter wells were damaged when added petroleum sulfonate. The results showed that the petroleum sulfonate with low concentration is helpful for depressurization and augmented injection since it can reduce surface tension of sewage, and it also has some corrosion control effect.