The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Apr. 02, 2024

Filed:

May. 07, 2020
Applicant:

Magnetic Variation Services, Llc, Denver, CO (US);

Inventors:

Stefan Maus, Boulder, CO (US);

Alexander Michael Mitkus, Denver, CO (US);

Timothy William Gee, Englewood, CO (US);

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 44/00 (2006.01); E21B 7/04 (2006.01); E21B 47/04 (2012.01); G01B 21/18 (2006.01); G05B 13/04 (2006.01);
U.S. Cl.
CPC ...
E21B 47/04 (2013.01); E21B 7/04 (2013.01); E21B 44/00 (2013.01); G01B 21/18 (2013.01); G05B 13/04 (2013.01); G05B 13/041 (2013.01); E21B 2200/20 (2020.05);
Abstract

Stratigraphic analysis includes determining misfit values between stratigraphic vertical depth of an offset wellbore, SVDand measured depth of a subject wellbore. A likelihood that the target measured depth is equal to or within a tolerance of stratigraphic vertical depth of the subject wellbore, SVD, for sequences of stratigraphic vertical depth is calculated. A probability weighted average and an uncertainty that the target measured depth for the subject wellbore, TMD, is equal to or within a tolerance of stratigraphic vertical depth of the subject wellbore, is calculated. A continuous probability function over a range of measured depth that the target measured depth for the subject wellbore, TMD, is equal to or within a tolerance of stratigraphic vertical depth of the subject wellbore, SVD, is calculated. The likelihood, the probability weighted average, the uncertainty, and the continuous probability function are used to make drilling decisions


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