AGL Energy Limited is seeking to sell gas storage and exploration assets. AGL Energy is seeking buyers for a bunch of gas storage and exploration assets it inherited as part of the Mosaic Oil takeover in 2010. The utilities giant is believed to be testing market interest in the Silver Springs gas storage facility in central Queensland's Surat Basin, the nearby Churchie gas field and some undeveloped discoveries and exploration ground. It's understood the sale is part of AGL's decision to exit upstream gas, as announced this time last year, rather than a move to get out of gas storage infrastructure altogether. AGL is expected to retain its Newcastle Gas Storage Facility.