Evaporation in thin film region of water at ambient temperature under reduced pressure conditions: Flow and interface characteristics

Liu, Yongxin; Zhou, Leping; Du, Xiaoze

doi:10.1016/j.vacuum.2023.111814

Cited by 4 publications

(1 citation statement)

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“…In 2005, a piecewise function expression of wind speed function was established based on the Dalton model, which further reduced the error of surface evaporation prediction (Min, 2005). At present, the research on the evaporation model mainly focuses on the evaporation of conditions with normal temperature and pressure or reduced pressure Liu et al, 2023). The pressure of CSG in the wellbore is high.…”

Section: Introductionmentioning

confidence: 99%

Study on evaporation drainage of deep coal seam gas wells

Zhu,

Jing,

Zhang

et al. 2024

Front. Energy Res.

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Targeting the problem of a small amount of fluid accumulation in deep coal seam gas (CSG) wells during flowing production stage, the evaporation drainage method is proposed to discharge the liquid accumulation. Based on the Dalton evaporation model and wind speed function, a calculation model of evaporation drainage was established for deep CSG wells, which was verified by laboratory experiments. Taking a CSG well in the western Ordos Basin as an example to analyze the evaporation drainage capacity, the influence of temperature, daily gas production, bottomhole flowing pressure (BHFP), formation gas water saturation on the evaporation drainage capacity was investigated. The results show that the maximum evaporation water production is 2,533.8 kg/d at a bottomhole temperature of 80°C and a gas production rate of 30 × 103 m3/d. It is found that the temperature and pressure have a marked influence on the evaporation drainage. By improving the gas production and bottomhole temperature, and reducing the BHFP can effectively promote the evaporation drainage capacity. The initial moisture content of CSG in the reservoir are inversely proportional to the evaporation drainage capacity. By adjusting the BHFP and daily gas production, the evaporation drainage capacity can match the liquid production rate of the formation. Evaporation drainage can effectively extend the flowing production time of deep CSG wells and reduce the costs of production.

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Section: Introductionmentioning

confidence: 99%