Discussion on layered string structure and sealing inspection method of injection well

Abstract:
Contradiction between layers, and the primary condition is that the layered pipe string must be sealed. Sealing inspection of injection well string is the main method to check whether the packer of injection well is sealed. In the process of sealing inspection, some unqualified sealing inspection data often appear, which is easy to be judged as unsealed. It may cause false report of operation and waste of production cost.This paper enumerates and analyzes the common unqualified sealing inspection data, analyzes it in combination with the structural characteristics of downhole string, and puts forward the corresponding rectification methods to improve the sealing inspection coincidence rate of layered injection wells.