natural gas storage item vince something interesting natural gas storage class industry rapidly adopting called operational balancing agreements pipeline contracts producers ldc public utilities handle imbalances shipping namely production shortfalls overages consumption likewise shippers always book scheduled happen actually happens end result storage facillities associated production regions used smooth weekday weekend seasonal patterns well known parking insure issues wellhead output well cutting chase storage facilities producing regions operated insure integrity pipeline system estimated marketed production likely better estimate actual flow pipeline receipt meter production less local storage clayton