It can also be used to calculate recoverable reserves according to the extreme oilsteamratio in this period.
又可根据蒸汽吞吐阶段的极限油汽比，计算该阶段的可采储量。
2
Cyclic steam stimulation is a major way of recovering heavy oil at present. Efficient development is highly dependent on rational using of steam energy and improving oil-steamratio.
The statistics of 36 oilfield steam drive pilot test results show that the oil-steamratio depends on not only the reservoir parameters, but also the steam injection rate.