Patent ID: 11940589
Assignee: LANDMARK GRAPHICS CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  E | IPC E  G

Claim 17:
18. A system, comprising:
a data transceiver, capable of receiving a set of directional survey points and input parameters, wherein the set of directional survey points is collected along a borehole path of a borehole, where the borehole path is located through a subterranean formation; and
a stratigraphic processor, capable of communicating with the data transceiver, calculating intersection points between the borehole and one or more layers of the subterranean formation, determining layer types of the one or more layers where at least one layer in the one or more layers has a layer type that is unconformable, calculating a set of true stratigraphic thicknesses (TSTs) between a layer of the one or more layers and each directional survey point in the set of directional survey points, calculating a set of TST differences using the set of TSTs that are adjacent, calculating a set of turning points in stratigraphy (TPS) using the set of TST differences and the input parameters, a linear transformation from a measured depth to each TST difference in the set of TST differences is used to calculate the set of TPS, and wherein an adjustment to an angle or a direction of a geo-steering system is made, using the set of TPS, to adjust an orientation of the borehole path relative to the set of TPS.