Operationally, a commercial Steam Assisted Gravity Drainage (SAGD) project differs in a number of respects to other production technologies, such as primary or Cyclic Steam Stimulation (CSS). First, the SAGD technology is unique in that when a SAGD well is shut-in, the recovery process continues to operate. Heat continues to be transferred into the cold bitumen and bitumen continues to drain down into the pool of hot liquids at the base of the chamber. Secondly, the process involves the generation of a large steam chamber, which has considerable heat storage. Short-term variances in steam injection have little impact on chamber pressure and therefore temperature. These unique characteristics present a number of opportunities to exploit seasonal and short-term variations in bitumen and gas prices to the advantage of the SAGD, operator.