Method and apparatus utilizing nmr measurements to gather information on a property of the earth formation surrounding a wellbore
CA 2450598 C · Owner: Heidler, Ralf · Inventors: Woodburn, Charles; Heidler, Ralf
Overview
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A method is provided for gathering information on the pore pressure in an earth formation surrounding a wellbore. The method includes the initial steps of selecting at least one suitable property (e.g. porosity drilling fluid composition, etc.) of the drilling environment (which is defined by the wellbore and the surrounding formation) and at least one NMR parameter (e.g. T2 distribution) in an NMR measurement response. The method selects a suitable property for which values over a plurality of wellbore depths can be correlated with the characteristics or behavior of the pore pressure in the earth formation. The method further includes conducting an NMR measurement at a plurality of …
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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.
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- Filed November 24, 2003 and granted January 8, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 24, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 24, 2025.
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