Method for charting drillable zones in an oilfield avoiding anomaly zones
US6101446A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 30, 1999 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | Mar 30, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V1/301
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The charting method consists in realising a recordings acquisition, constituting on the basis of the recorded seismic traces, a 3D seismic block (X, Y, T) sampled in elementary cells (C.sub.ijk), such that each elementary cell contains a sample (k) of a central seismic trace (TR.sub.ij), calculating for each elementary cell (C.sub.ijk) of the seismic block, the energy thereof, and fixing an energy threshold beyond which the presence Tk of anomaly zones is considered probable, selecting cells of the block which have energy equal or superior to the said threshold, coding the selected cells, such that all the cells belonging to a same contiguously selected cell set have the same code and the selected cells belonging to distinct contiguously selected cell sets have different codes, and effecting an XY projection of the coded cell block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.