Patent ID: 11867050
Assignee: MAGNETIC VARIATION SERVICES, LLC
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A method for drilling, the method comprising:
accessing, by a computer system, typelog reference data respectively associated with a plurality of reference wells in a geological vicinity of a well to be drilled;
using the typelog reference data, performing, by the computer system, a typelog alignment for the typelog reference data using multi-stage optimization based on the alignment between multiple pairs of typelogs to generate an aligned depth log, wherein performing the typelog alignment for the plurality of reference wells using multi-stage optimization further comprises:
performing, by the computer system, a multistage iterative optimization including successive alignment through multiple stages of data,
when results of the multistage iterative optimization are not acceptable, adjusting, by the computer system, at least one of a start depth, an end depth, and a current alignment function, and
when results of the multistage iterative optimization are acceptable, outputting the aligned depth log;

using the aligned depth log, determining, by the computer system, a stratigraphic depth of a bottom hole assembly (BHA) in a wellbore of the well during drilling; and
using the aligned depth log, drilling a portion of the wellbore based on the stratigraphic depth.