发明申请
- 专利标题: Method for reducing permeability restriction near wellbore
- 专利标题(中): 降低井筒附近渗透率限制的方法
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申请号: US10364717申请日: 2003-02-11
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公开(公告)号: US20040157749A1公开(公告)日: 2004-08-12
- 发明人: John W. Ely , Bradley C. Wolters , William D. McCain
- 主分类号: E21B043/00
- IPC分类号: E21B043/00
摘要:
Method is provided for increasing the productivity of gas wells producing from reservoirs where retrograde condensation occurs around the wells. An oil-wetting surfactant is injected in a solvent to oil wet the formation for a selected distance around a well or a hydraulic fracture intersecting the well. A pre-flush liquid, such as carbon dioxide, alcohol or similar products and mixtures thereof, may be used to reduce water saturation before injection of the surfactant. The method may also be applied to increase the productivity of oil wells producing from reservoirs where breakout of solution gas occurs near the well.
公开/授权文献
- US06945327B2 Method for reducing permeability restriction near wellbore 公开/授权日:2005-09-20