US Patent No: 4,982,381
Number of patents in Portfolio can not be more than 2000
Method and device for acquiring and processing signals obtained in wells and particularly in horizontal wells
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Jan 1, 1991
Issued date -
Nov 28, 1989
filing date -
07/441,982
serial no -
Expired
status
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Abstract
A method is disclosed for acquiring and processing logs obtained by a well-logging tool moved in a well, providing better discrimination between the discontinuities of the sub-soil oriented substantially in the same direction as the well and situated on each side thereof, and particularly in a substantially horizontal well. The method includes the displacement of the tool along the well and the provision of at least two series of signal transmission, reception and logging cycles, the position of the signal transmission and/or reception means relatively to the axis of the well being different from one series to another, so as to cause the distance from the transmission and/or reception means to the discontinuities on each side of the well to vary. Combining the logs from these series of cycles makes it possible to distinguish the reflections on the side of the well from which they come.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 4,460,986 Method of seismic exploration using acoustic diagraphy | 10 | 1981 | |
| 4,833,658 Method of seismic prospecting with very high resolution in horizontal boreholes | 6 | 1987 | |
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| 4,597,464 Method and system for well velocity shooting and vertical seismic profiling | 12 | 1982 | |
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| 4,641,520 Shear wave transducer for stress measurements in boreholes | 19 | 1984 | |
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| 4,873,675 Method and apparatus for seismic exploration of strata surrounding a borehole | 8 | 1988 | |