Process for separating waves in borehole seismics for walkway-type acquisitions
US6028821A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 7, 1998 |
| Grant date | Feb 22, 2000 |
| Priority date | — |
| Expiry date | Oct 7, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/614
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A process for separating waves in borehole seismics for walkaway-type acquisitions. Waves are generated in a medium from several positions of a source. The waves are received at at least three sensors along axes V, H.sub.1, H.sub.2. Collections of C traces are formed with a common source. On the basis of the trace collection, collections of residual C traces and C signals, a pivot trace is selected from the collection of residual C traces. A straight line of variable slope p is plotted at each sampled point of the pivot trace. The amplitudes of the seismic events located at the intersections of the traces with the straight line are summed along the straight line. The amplitude sums are then transferred to a domain (.tau., p). A synthetic seismogram is made from the domain (.tau., p) and iterations are performed until the synthetic seismogram is acceptable in terms of the data of the collection of residual C traces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.