Tubing injection wells using injection process for reducing pressure and increasing acidification

The present invention discloses a water injection well with a production string acidification process for blood pressure by injection, comprises the following steps: a, volume ratio, taking weak acid to acidify the solution from 0.3 to 3 parts to 97 parts water injection mixing 99.7; B, by drip injection method, the mixture is injected into the water line; C while, when the amount reaches the set injection with water injection well and the pressure reduced to 90% before application of the injection pressure, injection is stopped the mixture; the feeble acidifying solution is: in weight percent, which component: acid: 10-30%; stabilizer: 2-8%; inhibitor: 1 to 5%; surfactant: 6.5 to 17%; I the amount of distilled water. This method expands the radius acidizing injection wells, injection wells alleviate fouling near the wellbore, to extend the validity of the injection wells; Tubing achieve continuous compounding acidification, simplifying the construction process; acidified water wells simultaneously without affecting normal produce.