A method for determining, displaying and utilizing the relative changes of elastic moduli and that of density of geologic formations
CA 2246151 C · Owner: China National Offshore Oil Corp. · Inventors: Chen, Xinping
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The general object of the present invention is to provide a method for determining and displaying the relative changes of elastic moduli and that of density of geologic formations and for utilizing these relative changes and plottings for gas/oil exploration especially for direct gas and light oil detection. The said relative changes of elastic moduli are the relative change of Lame constant .DELTA..lambda./(.lambda.+2µ) the relative change of shear, modulus .DELTA.µ/(.lambda.+2µ) and/or .DELTA.µ/k+(4/3µ the relative change of bulk modulus, .DELTA.k/k+(4/3)µ; and the relative change of density is .DELTA.p/p.
Read the whole patent
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 November 20, 1996 and granted October 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 20, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 2018.
- 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
Timeline From CIPO dates
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.