Method and apparatus for evaluating the resistivity of invaded formations at high apparent dip angle
CA 2257748 C · Owner: Barber, Thomas D. · Inventors: Barber, Thomas D.; Minerbo, Gerald N.; Broussard, Tracy E.
Overview
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Open the CIPO recordAbstract From the Canadian patent
The present invention relates generally to a method and apparatus for evaluating the resistivity of invaded formations at high apparent dip angle. A multi- array induction tool having a plurality of arrays is disposed in a borehole. Signals from a subset of coils of the array are selected to probe different volumes of the formation surrounding the borehole. The maximum entropy method is used to process data from the subset of coils to effectively remove distortions produced by shoulder and dip effect in the presence of shallow moderate, or deep invasion. After processing the data the resulting multi-array induction log will indicate a conductivity profile for the subset of coils which is …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed January 4, 1999 and granted April 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 4, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 4, 2021.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.