在典型的蒸汽驱里，常通过一种便携系统对回注蒸汽干度进行定期测量，多为一月一次，然后依据所获值设定阀门与记录仪。而这些值在下一次测量前一直假设为恒定不变。蒸汽干度随时间变化会严重影响开采效果。在加州中部进行的一次大规模热采研究表明，蒸汽干度在45％和100％之间 In a typical steam flooding, the dryness of the injected steam is often measured periodically by a portable system, mostly once a month, and the valves and recorder are then set based on the values ​​obtained. These values ​​are assumed to be constant until the next measurement. Steam dryness over time can seriously affect the mining effect. A large-scale thermal recovery study conducted in central California showed that the dryness of steam is between 45% and 100%