Objective In order to effectively control the leakage risk of water reinjection in the gas field, the prevention and control gate of groundwater pollution risk is put in front.

Methods This study established the Hall plot of the reinjection well combined with the daily operation parameters. The linear relationship between the cumulative injection volume of the reinjection well and Hall integral (injection pressure difference×cumulative time) was used to monitor abnormal reinjection conditions. The application of microseismic monitoring technology also verify the Results.

Results The application of Hall plot can track and monitor the reinjection wells more easily and visually, eliminate the influence of changes in single injection parameters, realize the early warning of reinjection risk on the basis of routine monitoring on underground water in the water reinjection wells, improve the accuracy and scientificity of leakage monitoring on the reinjection wells in gas field, and lay a foundation for the early warning of underground water environmental risk in the reinjection wells in the following step.

Conclusions The groundwater environmental risk prevention and control system with the integrity management of gas field water reinjection wells as the core should be further established and improved.