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US 2026/0287777 A1Published application
Wellbore data depth matching using change point algorithms
AssigneeSchlumberger Technology Corporation
InventorSylvain WLODARCZYK
Life of this patent
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Abstract
A method includes receiving a well log having a signal. The method also includes identifying in the signal a first change point that demarcates a first signal region and a second signal region. The method also includes determining that the first signal region is inconsistent in comparison to the second signal region. The method also includes producing a modified well log by removing the first signal region from the signal in response to determining that the first signal region is inconsistent in comparison to the second signal region.
Claims20
A method comprising:
- receiving a first well log comprising a first signal and a second well log comprising a second signal;
- positioning a first window within the first well log and a second window at a first location within the second well log;
- determining a first similarity value between the first signal in the first window and the second signal in the second window at the first location;
- repositioning the second window at a second location within the second well log;
- determining a second similarity value between the first signal in the first window and the second signal in the second window at the second location;
- selecting the first location or the second location of the second window based on the first and second similarity values;
- and
- producing a modified second well log based on a selected one of the first and second locations of the second window.
5 more elements
A computing system comprising:
- one or more processors;
- and
- a memory system comprising one or more non-transitory computer-readable media storing instructions that, when executed by at least one of the one or more processors, cause the computing system to perform operations, the operations comprising:
- receiving a first well log comprising a first signal and a second well log comprising a second signal;
- positioning a first window within the first well log and a second window at a first location within the second well log;
- determining a first similarity value between the first signal in the first window and the second signal in the second window at the first location;
- repositioning the second window at a second location within the second well log;
- determining a second similarity value between the first signal in the first window and the second signal in the second window at the second location;
- selecting the first location or the second location of the second window based on the first and second similarity values;
- and
- producing a modified second well log based on a selected one of the first and second locations of the second window.
8 more elements
A method comprising:
- receiving a first well log comprising a first signal and a second well log comprising a second signal;
- selecting a second change point in the second well log, wherein the second change point represents a depth in the second well log and is selected based on a proximity to a depth represented by a first change point in the first well log;
- positioning a first window in the first well log based on the first change point;
- positioning a second window at a first location in the second well log based on the second change point;
- determining a first similarity value between the first signal in the first window and the second signal in the second window at the first location;
- repositioning the second window at a second location in the second well log based on the second change point;
- determining a second similarity value between the first signal in the first window and the second signal in the second window at the second location;
- selecting the first location or the second location of the second window based on the first and second similarity values;
- determining a modified second change point based on a selected one of the first and second locations of the second window;
- and
- producing a modified second well log based on the modified second change point.
8 more elements
Dependencies are inferred from the claim text.