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US 2022/0018244 A1Published application
Downhole Ranging Using 3D Magnetic Field and 3D Gradient Field Measurements
AssigneeHalliburton Energy Services, Inc.
InventorsMichael Bittar, Hsu-Hsiang Wu, Yijing Fan
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Abstract
A ranging system and method uses three-dimensional (“3D”) magnetic field measurements to correct ranging distance and direction. Ghost well interference may also be decoupled from the ranging solutions using 3D magnetic gradient field measurements.
Claims23
A method for downhole magnetic ranging between a first and second wellbore, the method comprising:
- deploying one or more magnetic receivers in a second wellbore positioned adjacent a first wellbore, the magnetic receivers being located on a tool body;
- emitting magnetic fields from the first wellbore;
- calculating a range between the first and second wellbores using magnetic fields obtained by the magnetic receivers, wherein the range includes at least one of:
- a distance between the first and second wellbores;
- or
- a direction of the first wellbore in relation to the second wellbore;
- using the magnetic receivers positioned at a first axial position along the second wellbore to obtain a first magnetic field emitted from the first wellbore;
- using the magnetic receivers positioned at a second axial position along the second wellbore to obtain a second magnetic field emitted from the first wellbore, the second axial position being axially offset from the first axial position,
- wherein the first and second magnetic fields combine to form a three-dimensional (“3D”) magnetic field;
- and
- using the 3D magnetic field to correct the range between the first and second wellbores.
8 more elements
A system for downhole magnetic ranging between a first and second wellbore, the system comprising:
- one or more magnetic receivers located along a tool body;
- and
- processing circuitry communicably coupled to the magnetic receivers and comprising instructions which, when executed, causes the processing circuitry to perform operations comprising:
- calculating a range between the first and second wellbores using magnetic fields obtained by the magnetic receivers, wherein the range includes at least one of:
- a distance between the first and second wellbores;
- or
- a direction of the first wellbore in relation to the second wellbore;
- using the magnetic receivers positioned at a first axial position along the second wellbore to obtain a first magnetic field emitted from the first wellbore;
- using the magnetic receivers positioned at a second axial position along the second wellbore to obtain a second magnetic field emitted from the first wellbore, the second axial position being axially offset from the first axial position,
- wherein the first and second magnetic fields combine to form a three-dimensional (“3D”) magnetic field;
- and
- using the 3D magnetic field to correct the range between the first and second wellbores.
9 more elements
A method for downhole magnetic ranging between a first and second wellbore, the method comprising:
- calculating a range between a first and second wellbore using magnetic fields emitted from the first wellbore;
- obtaining a three-dimensional (“3D”) magnetic field by combining magnetic fields obtained at different axial positions along the second wellbore;
- and
- correcting the range using the 3D magnetic field.
1 more element
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Dependencies are inferred from the claim text.