发明名称 |
Method for estimating a position of a wellbore |
摘要 |
A method is disclosed which utilizes multiple overlapping surveys to estimate a position in a wellbore and related position uncertainty. Multiple surveys are often taken over the same portion of a wellbore either concurrently or sequentially and/or using various instruments. Each survey generates an estimated survey position and related uncertainty for a given location in the wellbore. By combining the estimated survey positions and uncertainties for these overlapping surveys, a resultant position and related ellipsoid of uncertainty is estimated. This resultant position estimates a position in the wellbore by incorporating the estimated survey positions and uncertainties of multiple overlapping surveys.
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申请公布号 |
US6736221(B2) |
申请公布日期 |
2004.05.18 |
申请号 |
US20010028864 |
申请日期 |
2001.12.21 |
申请人 |
SCHLUMBERGER TECHNOLOGY CORPORATION |
发明人 |
CHIA CHRISTOPHER R.;PHILLIPS WAYNE J.;AKLESTAD DARREN LEE |
分类号 |
E21B47/022;(IPC1-7):E21B47/00 |
主分类号 |
E21B47/022 |
代理机构 |
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代理人 |
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地址 |
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