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 one or more planned markers with a drilling plan, comprising:
using, by a computer system, a first log file of a first well in order to identify and store one or more markers that have a name, a true vertical depth (TVD) and a waveform; creating, by the computer system, one or more planned markers for a second well, where each of the one or more planned markers corresponds to one of the identified and stored markers; assigning, by the computer system, an estimated TVD value and an uncertainty range value to each of the one or more planned markers; and storing, by the computer system, each of the one or more planned markers with the assigned estimated TVD and the uncertainty range value.