steam period

Use of payback period and dynamics of the annual cost of other economic indicators, right back to the second category of high temperature thermal absorption heat pump for the steam system, economy is evaluated.

采用投资回收期和动态年度费用等经济性指标，对回热式高温型第二类吸收式热泵供汽系统的经济性进行了评价。

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Anatomise the energy change of the oil zone and injection steam during soak period, the reasonable calculation formula to calculate the time of soaking is deduced.

详细剖析了焖井过程中油层和蒸汽的能量变化，推导了焖井结束后加热半径的计算公式，推导出确定焖井时间的合理计算公式。

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Harmful effect caused by rise in viscosity can be removed, pump efficiency may be raised, production period of oil well may be prolonged and oil production in period may be increased by pumping through variable? displacement in steam?

采用变排量抽油技术能消除因粘度升高造成的不利影响，提高泵效、延长油井生产周期、增加周期产油量。

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The results showed that the revamping could save steam 2-3 t/ h, circulating water 170 t/ h and had good creat direct economical profits. The investment recovery period was about 4 months.

改造后，节约1.0MPa蒸汽2～3t/h，冷却稳定汽油所用循环水流量减少170t/h，直接经济效益233.9万元/a，投资回收期约为4个月。

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Optimal multi-period operational planning of steam power systems using improved particle swarm optimization method

改进PSO算法在蒸汽动力系统多周期运行优化中的应用

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Application of the Downhole Thermocouple Temperature Log Data in Steam Soaking Period

井下热电偶测温技术在吞吐开采阶段的应用研究

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