Theory of Influences of Water Hammer Effect on Well Cleanout
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摘要: 洗井工艺在水文勘探孔成井工艺中占有重要的地位。以封闭反压洗井为例,详细阐述了水锤效应的洗井原理,并通过相应的模型简化推算,得出了水锤效应所造成的水头差可达136 m,在理论上证明了水锤效应具有良好的洗井效果。最后,通过对水锤压强公式中变量的分析,提出了将泵的入水口置于封隔段最底端、提高泵量、减小封隔段长度等3种方法来优化水锤效应的洗井效果。Abstract: Cleanout service plays an important role in hydrological well completion.With an example of packed backpres-sure cleanout, well cleanout by water hammer effect is elaborated in this paper.It is showed that by the model simplifica-tion, the water head difference caused by water hammer effect can reach 136m;the good effect of well washing is proved in theory.Based on the analysis on variance in the water hammer pressure formula, 3 methods for well cleanout optimization by water hammer effect are put forward:put suction nozzle of pump at the bottom end of packed interval, increase the pump volume or shorten the length of packed interval.
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Key words:
- packed backpressure cleanout /
- water hammer effect /
- water hammer wave
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