Method for joint interpretation of multi-array induction and multi-component induction measurements with joint dip angle estimation
US6885947B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2002 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Mar 23, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Data are acquired using multi-array logging tool in a borehole having an angle of inclination to a normal to the bedding plane of earth formations. The multi-array measurements are filtered using angle dependent filters to give a filtered curve corresponding to a target one of the multi-array measurements using angle dependent filters. Correlation coefficients are determined for a set of possible dip angles and a relative dip angle is estimated from the correlation coefficients. This dip angle estimate together with bed boundaries obtained from the multi-array measurements are used for inverting multi-component measurements alone or jointly with multi-array measurements to refine the relative dip angle interpretation and give horizontal and vertical formation resistivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.