| 利用井底压力采集短接准确计算地层压力的方法 |
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| 引用本文： | 刘永贵,孔凡军,杨海波,董孟坤,李明.利用井底压力采集短接准确计算地层压力的方法[J].探矿工程,2004,31(6):54-57. |
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| 作者姓名： | 刘永贵 孔凡军 杨海波 董孟坤 李明 |
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| 作者单位： | 大庆石油管理局钻井工程技术研究院;大庆油田有限责任公司勘探分公司;大庆石油管理局钻井工程技术研究院;大庆钻井一公司;大庆石油管理局钻井工程技术研究院 |
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| 摘 要： | 介绍了现有技术情况下求取欠平衡地层压力的方法以及存在的缺点，在此基础上研制了井底压力采集短接，通过现场试验，实测出关井求压过程中井下气液两相流时的井底压力，根据常规试井理论和地层渗流理论建立一种利用实测数据计算地层压力的新方法，该方法是在井筒内建立压力平衡，采用实际测量出的平衡点的井底压力，消除了套压、立压不稳定以及钻井液密度不准带来的误差，准确计算出该井段各分层地层压力的大小。该方法非常接近实际地层压力，使关井求压计算值误差降低4%左右。
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| 关 键 词： | 大庆油田 欠平衡钻井 地层压力 井底压力 采集短接 关井求压 |
| 收稿时间： | 2003/12/12 0:00:00 |
| 修稿时间： | 2003/12/12 0:00:00 |
Precise Calculation Methods for Formation Pressure with Downhole Pressure Collection Joint |
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| LIU Yong-gui,KONG Fan-jun,YANG Hai-bo,DONG Meng-kun and LI Ming.Precise Calculation Methods for Formation Pressure with Downhole Pressure Collection Joint[J].Exploration Engineering(Drilling & Tunneling),2004,31(6):54-57. |
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| Authors: | LIU Yong-gui KONG Fan-jun YANG Hai-bo DONG Meng-kun and LI Ming |
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| Institution: | Drilling Engineering Technology Institute of Daqing Petroleum Administrative Bureau;Survey Branch of Daqing Oil Field Corporation;Drilling Engineering Technology Institute of Daqing Petroleum Administrative Bureau;Daqing First Drilling Company;Drilling Engineering Technology Institute of Daqing Petroleum Administrative Bureau |
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| Abstract: | Calculation methods of under balanced formation pressure under existing technology and its defects are introduced. Down hole pressure collection joints are development. Air/liquid double phase pressure down the well was measured during well shut off through in situ test. A new formation pressure calculation method was established based on conventional well test theory and formation transfusion theory and using measured data. The method was established on pressure balance around well wall and the down hole pressure at balance point which was actually measured. It eliminated the errors caused by unstable casing and stand pipe pressure and imprecise drilling fluid density. It can precisely calculate the formation pressures along the borehole. The calculated pressure by the method is much closed to actual pressures. The calculation errors of well shut off pressure were down about 4%. |
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| Keywords: | Daqing Oilfield under balance pressure drilling formation pressure down hole pressure collection joint well shut off pressure |
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