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US 2016/0102544 A1Published application
Well Trajectory Planning Using Bounding Box Scan For Anti-Collision Analysis
AssigneeSchlumberger Technology Corporation
InventorsDarren Lee Aklestad, Chun Wang, Lu Jiang, Nannan Zhang
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Abstract
A method for evaluating a planned well trajectory for avoidance of collision with an existing wellbore includes constructing a bounding box about the planned well trajectory and a bounding box for a trajectory of at least one existing wellbore. If there is no intersection between the bounding boxes, the planned well trajectory is used for drilling a well.
Claims20
A method for evaluating a planned well trajectory for avoidance of collision with an existing wellbore, comprising:
- in a processor, constructing a bounding box about the planned well trajectory and a bounding box for a trajectory of at least one existing wellbore, the existing well trajectory constructed from survey data obtained from the at least one existing well;
- and
- determining in the processor if there is no intersection between the bounding boxes, and using the planned well trajectory for drilling a well if no intersection exists.
A method for directionally drilling a well, comprising:
- operating a directional drilling system to cause a well to follow a planned well trajectory;
- at selected length intervals during operating the directional drilling system, stopping drilling and obtaining a directional survey at a point of the stopping;
- determining a well trajectory from the directional survey and any prior directional surveys;
- constructing a bounding box about the determined well trajectory and a bounding box for a trajectory of at least one existing wellbore;
- and
- if there is no intersection between the bounding boxes, continuing drilling the well along the planned well trajectory.
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Dependencies are inferred from the claim text.