子洲地区山2段气藏底水控水对策研究

Water control strategy of bottom water in Zizhou gas field

气井出水不仅容易使得气井产能快速下降,还可能导致气藏井控动态储量减少,增加生产管理难度。子洲山2段气藏广泛存在底水,底水锥进会导致气井产能急剧下降,在分析研究气藏主要地质特征的基础上,就底水的控水技术展开研究,文中运用了Dupuit临界产量公式和Schols.R.S临界产量计算模型,得到气井合理打开程度与临界产量之间的关系,以期为开发对策调整提供依据。

Water breakthrough not only leads to quick decreased productivity but reduced dynamic gas reserves of well control, which makes it difficult to production management. Therefore,water control is one of the most pressing problems facing in gas reservoirs.As bottom - water occurs widely in Member 2 of Shanxi Formation in Zizhou gas field, the bottom water coning will cause the productivity of gas wells decrease dramatically.Based on the main regional geological features of gas reservoirs,the study on water- control technology in base - water driving reservoirs was carried out.By using Dupuit critical production formula and Schols. R.S model for calculation,the relationship between the gas well critical output and its rational perforating level was obtained in this paper,which provides guidance for development strategy adjustment.