Method for fracture detection using multicomponent seismic data
CA 2278441 C · Owner: Colorado School Of Mines · Inventors: Devault, Bryan C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a method for interpreting shear-wave seismic data, to detect fractures in the subsurface of the earths crust. Seismic shear waves are acquired, along medium symmetry planes and their corresponding AVO intercepts and gradients are, estimated. The resulting AVO attributes are combined using a weighted least squares, solution to estimate the change in splitting parameter and fast shear velocity, which are, diagnostic of the presence of fractures. The method is also useful in assessing the porosity, of the subsurface. Knowledge o.f subsurface fracturing and porosity is useful in locating, for example, oil and gas wells.
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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 July 23, 1999 and granted October 21, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 23, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.