The period within 1-15 April and the period within 1-15 October each calendar year shall be used for stabilization of the reservoir, technical preventive maintenance and preparation of the gas storage for the next basic period of injection/withdrawal.

Please note that Bulgartransgaz EAD may change this schedule due to technological and operational reasons. Any change will be announced in due course on this webpage.

UGS “Chiren” - maintenance schedule