System and method for formation detection and evaluation

摘要

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.

主权项

1. A method for using a plurality of planned markers with a drilling plan comprising:
obtaining, by a computer system, a marker archive containing a plurality of baseline markers from at least one existing well, wherein each of the baseline markers corresponds to a waveform from a first log file obtained from the first well, and wherein each of the baseline markers is associated within the marker archive with a name, a true vertical depth (TVD) value of the corresponding waveform, and a waveform representation of the corresponding waveform; creating, by the computer system, a plurality of planned markers for a drilling plan for a second well; associating, by the computer system, each of the plurality of planned markers with one of the baseline markers; assigning, by the computer system, an estimated TVD value and an uncertainty range to each of the planned markers; and saving, by the computer system, each of the planned markers.