Title:
REAL-TIME FORMATION ANISOTROPY AND DIP EVALUATION USING TRI-AXIAL INDUCTION MEASUREMENTS
Document Type and Number:
WIPO Patent Application WO/2011/091216
Kind Code:
A3
Abstract:
The present disclosure relates to a method to determine a formation property of a subsurface formation. A downhole logging tool having two or more tri-axial antennas is provided and used to obtain azimuthally sensitive data. Borehole correction is performed on the obtained data and a ZD-inversion is performed on the borehole corrected data for all antenna spacing groups. A formation indicator flag is determined and, depending on the determined formation indicator flag, a 1D-axial inversion and/or a 1D-radial inversion is performed over selected zones, or neither is performed. The best ZD-inversion results are selected and the 1D-axial inversion results and/or the 1D-radial inversion results, if any, are combined with the selected best ZD- inversion results to form a composite inversion result. The formation property of the subsurface formation is determined using the composite inversion result.
Inventors:
WU PETER T (US)
BARBER THOMAS D (US)
BARBER THOMAS D (US)
Application Number:
PCT/US2011/021986
Publication Date:
October 27, 2011
Filing Date:
January 21, 2011
Export Citation:
Assignee:
SCHLUMBERGER CA LTD (CA)
SCHLUMBERGER TECHNOLOGY BV (NL)
PRAD RES & DEV LTD
SCHLUMBERGER SERVICES PETROL (FR)
SCHLUMBERGER HOLDINGS
WU PETER T (US)
BARBER THOMAS D (US)
SCHLUMBERGER TECHNOLOGY BV (NL)
PRAD RES & DEV LTD
SCHLUMBERGER SERVICES PETROL (FR)
SCHLUMBERGER HOLDINGS
WU PETER T (US)
BARBER THOMAS D (US)
International Classes:
G01V3/18; E21B47/00; G01V5/04; G16Z99/00
Foreign References:
| US6934635B2 | 2005-08-23 | |||
| EP2113794A1 | 2009-11-04 | |||
| US7076370B1 | 2006-07-11 | |||
| US20080211507A1 | 2008-09-04 |
Attorney, Agent or Firm:
FONSECA, Darla P. et al. (Office IP Counsel200 Gillingham Lane MD 200-, Sugar Land TX, US)
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