西南石油大学学报(自然科学版) ›› 2009, Vol. 31 ›› Issue (5): 97-100.DOI: 10.3863/j.issn.1674-5086.2009.05.020

• 石油与天然气工程 • 上一篇    下一篇

毛细管数效应对碳酸盐岩凝析气井产能的影响

李勇 胡永乐 李保柱 张晶   

  1. 中国石油勘探开发研究院油气田开发所,北京海淀100083
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-10-20 发布日期:2009-10-20

THE INFLUENCE OF CAPILLARY NUMBER EFFECT ON DELIVERABILITY OF CARBONATE ROCK GAS CONDENSATE RESERVOIRS

LI Yong HU Yong-le LI Bao-zhu ZHANG Jing   

  1. Research Institute of Petroleum Exploration and Development,CNPC,Haidian Beijing 100083,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-10-20 Published:2009-10-20

摘要: 反凝析现象对地层污染严重,而毛细管数效应则弱化了凝析油的堵塞作用。随着国内塔中I号碳酸盐岩凝析气田投入开发,迫切需要开展相关研究,从而指导气田的开发。介绍了毛细管数效应的定义及其对相对渗透率曲线的影响,通过建立双重介质单井径向模型,研究了毛细管数效应在不同流体性质、地层渗透率、地层压力降落速度情况下对产能的影响。结果表明,毛细管数效应使气井产能明显得到了改善。当地层压力高于露点压力时,毛细管数效应对产能没有影响;地层压力低于露点压力以后,毛细管数效应的影响最为明显,之后对产能的影响逐渐变小。基本规律为初始生产气油比越大、地层压力降落速度越快、岩块系统和裂缝系统渗透率越低,毛细管数效应对产能的影响越大。

关键词: 碳酸盐岩, 凝析气藏, 毛细管数效应, 产能, 双重介质

Abstract: Retrograde condensation can seriously pollute formation.The capillary number effect can reduce the impaction.With the development of Tazhong No.I carbonate rock gas condensate reservoirs in China,it becomes more and more important to study the influence of capillary number effect on deliverability of carbonate rock gas condensate reservoirs in order to guide the field development.The definition of the capillary number effect and its influence on relative permeability curve are presented.Through a dual-permeability simulation model,this research gets the capillary number effect on well deliverability for different flow fluid property,formation permeability and pressure drawdown rate conditions.The results show the deliverability is significantly improved if the capillary number effect included.When formation pressure is higher than the dew point pressure,capillary number effect has no effect on well deliverability,however,it has the largest effect just when formation pressure is smaller than the dew point pressure.And then its effect drops.The larger the initial gas-oil ratio is,the higher the pressure drawdown rate is,the smaller the permeability of matrix and fracture s

Key words: carbonate rock, gas condensate reservoir, capillary number effect, deliverability, dual-porosity media

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