The gas storage

with complex engineering geological conditions

has the characteristics of low formation pressure

alternating load and high intensity injection-recovery. The process of drilling

completion and injection-recovery can easily induce the formation damage

which seriously restricts the high efficient construction and injection-recovery efficiency of gas storage

and brings great challenges to the stable and safe gas supply of gas storage. Based on the analysis of the engineering geological characteristics of the gas storage

and combined with the actual formation damage control cases

the formation damage mechanism of the gas storage in the process of drilling

completion and injection-recovery has been revealed

and the technical countermeasures for the formation damage control of the gas storage has been put forward. The loss of drilling and completion fluid in gas formation is easy to induce solid invasion

fluid sensitivity

stress sensitivity and other damages

and the multi cycle strong injection-recovery is easy to induce stress sensitivity

particle migration

sand production and other damages. Formation damage control of gas storage requires strategic planning in advance

strengthening the concept of system engineering

upgrading and improving the whole life cycle reservoir protection and its supporting technology. Not only the construction and operation stage of gas storage

but also the development stage of gas field should be considered in the formation damage prediction

diagnosis

control and relief technology. Gas storage geology-engineering integration technology based on drilling and completion and multi cycle injection-recovery process should be researched and developed as soon as possible.