- Dallas TX, US BRIAN E. STOKELD - Lewisville TX, US DWIGHT A. LOCKHART - Dallas TX, US
International Classification:
E21B 47/04 E21B 47/09 E21B 47/024 G01V 5/12
Abstract:
A method for determining a total vertical depth (TVD) for a well plan involves measuring differences between a projected BHA position at a depth of a survey station and a calculated BHA position based upon a minimum curvature method at the depth of the survey station. The differences are accumulated at each survey station with respect to the BHA position. Real time TVD corrected gamma logs are generated responsive to the accumulated differences of the BHA position.
System And Method For Formation Detection And Evaluation
- Dallas TX, US BRIAN EUGENE STOKELD - Lewisville TX, US DWIGHT A. LOCKHART - Dallas TX, US
International Classification:
G01V 5/04 E21B 47/04
Abstract:
A method for locating planned markers within a log containing borehole data parses log data to locate an uncertainty region for a planned marker. A fingerprint match is located for the planned marker in the located uncertainty region. The located fingerprint match is saved. A determination is made if additional planned markers are present and returns to the step of parsing for a next planned marker if additional planned markers are present.
System And Method For Formation Detection And Evaluation
- Dallas TX, US BRIAN EUGENE STOKELD - Lewisville TX, US DWIGHT A. LOCKHART - Dallas TX, US
International Classification:
E21B 47/04 E21B 47/12
Abstract:
A method for using markers with a drilling plan uses 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. Second well log data generated while a second well is being drilled is monitored in real time. The second well log data is compared to the one or more markers to located a match to at least one marker in a predetermined TVD range. An estimated TVD value and an uncertainty range value are assigned to each of the at least one planned marker. When a matching marker is located for one of the one or more markers in the predetermined TVD range a report is generated.
System And Method For Formation Detection And Evaluation
- Dallas TX, US BRIAN EUGENE STOKELD - Lewisville TX, US DWIGHT A. LOCKHART - Dallas TX, US
International Classification:
G05B 19/042 E21B 7/00
US Classification:
175 57, 700275
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.
