发明名称 |
Subsurface borehole evaluation and downhole tool position determination methods |
摘要 |
<p>Methods for processing ultrasonic signal data to evaluate subsurface properties and tool orientation. Acoustic signals are transmitted into a plurality of azimuthal borehole positions. Formation echo signal transit time distributions are then determined in a plurality of azimuthal sectors for the acoustic signals. Front face echo signal transit times are also measured and farther-mode and closer-mode transit times are determined for the distribution of formation echo signals. Farther and closer tool standoffs are determined for the azimuthal sectors and a borehole diameter is determined from a summation including standoffs in opposing sectors. The standoffs are also used to determine a preferential tool position.</p> |
申请公布号 |
AU2003203923(B2) |
申请公布日期 |
2005.04.21 |
申请号 |
AU20030203923 |
申请日期 |
2003.04.29 |
申请人 |
SCHLUMBERGER TECHNOLOGY B.V. |
发明人 |
MIGUEL F PABON;W ROBERT SLOAN |
分类号 |
E21B47/08;G01V1/44;(IPC1-7):G01V001/50 |
主分类号 |
E21B47/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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