Analysis and optimization of influencing factors of negative pressure stripping desulfurization process for sour water in Yuanba gas field

LIU Penggang; SUN Tianli; CHEN Wei; HOU Xiaozhi; HUANG Yuanhe; ZHU Guo; HE Hai; FANG Bin

doi:10.13809/j.cnki.cn32-1825/te.2020.04.020

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Analysis and optimization of influencing factors of negative pressure stripping desulfurization process for sour water in Yuanba gas field
Vol. 10, Issue 4, Pages: 125-129(2020)
Published：2020
DOI： 10.13809/j.cnki.cn32-1825/te.2020.04.020
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DOI：

LIU Penggang, SUN Tianli, CHEN Wei, et al. Analysis and optimization of influencing factors of negative pressure stripping desulfurization process for sour water in Yuanba gas field[J]. Petroleum Reservoir Evaluation and Development, 2020, 10(4): 125-129. DOI： 10.13809/j.cnki.cn32-1825/te.2020.04.020.

摘要

针对目前元坝气田汽提塔脱硫效率低、正压汽提技术表现出局限性、存在极大优化空间的现象

开展了负压汽提脱硫新工艺现场试验

并对汽提效率影响因素进行深入分析研究。通过参数优化

得到最优进液pH值控制在4.0 ~ 5.0

推荐汽提塔塔压控制在-30 ~ -25 kPa

最优气液比为8 ~ 12

汽提进液量为7 ~ 9 m

有利于提高汽提效率。现场应用表明

优化后负压汽提效率达到96.28 %

比正压汽提提高19.68 %

年节约成本约180.86万元

降本增效效果显著。负压汽提脱硫新工艺表现出明显的技术优势和良好的应用前景

也为同类海相高含硫气田的现场应用提供一定的参考。

Abstract

In view of the low desulfurization efficiency of stripper

limitation of positive pressure stripping technology and great optimization space in Yuanba gas field

a new process of negative pressure stripper desulfurization is carried out

and the influencing factors of stripper efficiency are analyzed in depth. By parameter optimization

the optimal pH value is 4.0~5.0

the recommended stripper pressure is -30~-25 kPa

the optimal gas-liquid ratio is 8~12

and the liquid inlet volume is 7~9 m

which is conducive to improving the stripper efficiency. The field application shows that the efficiency of negative pressure stripping is 96.28 %

19.68 % higher than that of positive pressure stripping. The annual co

st saving is about 1 808 600 yuan

which has significant effect on cost reduction and benefits enhancement. The new process of negative pressure stripping desulfurization shows obvious technical advantages and good application prospects

and also provides certain reference for the field application of similar marine high sulfur gas fields.