徐深气田D区块气井积液诊断及水体规模

发布时间：2018-06-08 23:56

本文选题：徐深气田 + 火山岩气藏　；参考：《大庆石油地质与开发》2017年06期

【摘要】：徐深气田D区块属于块状底水的火山岩气藏,准确识别气井出水、判断气井是否积液、计算水体规模成为急需解决的问题。通过理论计算与现场动态分析相结合,建立了一套适合D区块气井出水与积液诊断的方法。研究表明:气藏出地层水的水气比下限为0.2 m~3/10~4m~3,矿化度下限为8 000 mg/L,气井临界携液流量为(1.55～3.45)×10~4m~3/d,水体规模为(6.27～6.86)×10~8m~3;综合水气比和矿化度下限可以快速准确识别气井是否出水;气井是否积液,取决于油管直径、井筒温度和压力3种因素综合作用结果。在静态水体规模计算基础上,引入动态方法来验证,有利于减小静态法参数选取的不确定性,能够更准确计算水体规模大小。
[Abstract]:The D block of Xushen gas field belongs to the volcanic gas reservoir with block bottom water. It is urgent to identify the gas well effluent accurately, judge whether the gas well accumulates liquid or not, and calculate the scale of water body. By combining theoretical calculation with field dynamic analysis, a set of methods suitable for the diagnosis of gas well effluent and fluid accumulation in block D are established. The results show that the lower limit of water-gas ratio of gas reservoir is 0.2 m / 3 / 10 / 4 m ~ (3), the lower limit of salinity is 8 000 mg / L, the critical liquid carrying flow rate of gas well is 1.55 ~ 3.45 脳 10 ~ (4) m ~ (3 / d), the scale of water body is 6.27 ~ 6.86) 脳 10 ~ (8) m ~ (3), the combined water-gas ratio and the lower limit of salinity can quickly and accurately identify whether the gas well is out of water or not. Whether the gas well accumulates fluid depends on the combined action of tubing diameter, wellbore temperature and pressure. On the basis of static water scale calculation, the dynamic method is introduced to verify, which is helpful to reduce the uncertainty of the static method parameter selection, and can calculate the water body size more accurately.
【作者单位】：大庆油田有限责任公司勘探开发研究院;重庆科技学院石油与天然气工程学院;
【基金】：中国石油天然气股份公司科技项目“火山岩气藏有效开发技术研究”(2011B-1506)
【分类号】：P618.13

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