Patent ID: 11920441
Assignee: MAGNETIC VARIATION SERVICES, LLC
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 1:
2. The method according to claim 1, wherein the misfit value, MV is computed using a plurality of offset well logs and the method further comprises:
taking a plurality of measurements at the plurality of measured depths, MDsw along the borehole of the subject well;
selecting a plurality of offset well logs, each having a plurality of measurements at true vertical depths, TVDow;
generating a mapping of true vertical depths, TVDow against stratigraphic vertical depths, SVDow, wherein the mapping relates the stratigraphic vertical depths, SVDow to the corresponding true vertical depths, TVDow of the plurality of offset well logs;
computing a combined Misfit value, MVc for each of the measurements at measured depths, MDsw of the borehole of the subject well, and offset measurements of true vertical depths, TVDow of all of the plurality of offset well logs;
determining, responsive to the combined misfit value, MVc, the stratigraphic vertical depth, SVDsw of the borehole of the subject well, wherein the stratigraphic vertical depth, SVDsw is determined to correspond to a minimum cost produced by the combined misfit value, MVc; and
drilling the borehole of the subject well responsive to the determined stratigraphic vertical depth, SVDsw, to the target stratigraphic vertical depth of the subject well, TSVDsw.