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1. (WO2014210021) SYSTEM AND METHOD FOR FORMATION DETECTION AND EVALUATION

Pub. No.:    WO/2014/210021    International Application No.:    PCT/US2014/043892
Publication Date: Thu Jan 01 00:59:59 CET 2015 International Filing Date: Wed Jun 25 01:59:59 CEST 2014
IPC: E21B 47/04
E21B 47/02
Applicants: MOTIVE DRILLING TECHNOLOGIES INC.
Inventors: BENSON, Todd, W.
STOKELD, Brian, Eugene
LOCKHART, Dwight, A.
Title: SYSTEM AND METHOD FOR FORMATION DETECTION AND EVALUATION
Abstract:
Provided are a system and method for identifying planned markers while drilling a borehole. In one example, the method includes obtaining a plan containing planned markers that each corresponds to a baseline marker from an existing well. Each of the baseline markers corresponds to a waveform from a log file obtained from the existing well and is associated with a waveform representation of the corresponding waveform. Each of the planned markers is associated with an estimated true vertical depth (TVD) value. A second log file corresponding to the borehole is obtained that contains waveforms representing formation information detected within the borehole. The second log file is scanned for a planned marker based on the estimated TVD value and the waveform representation of the baseline marker corresponding to the planned marker. At least one match may be identified and reported for the planned marker.