Abstract: Systems and methods for active ranging-while-drilling (ARWD) for collision avoidance and/or well interception. A method for electromagnetic ranging of a target wellbore may include disposing an electromagnetic ranging tool in a wellbore, wherein the electromagnetic ranging tool comprises an electromagnetic transmitter and an electromagnetic receiver; exciting a subterranean formation with the electromagnetic transmitter; adjusting at least one orientation of the electromagnetic transmitter, the electromagnetic receiver, or both the electromagnetic transmitter and the electromagnetic receiver; exciting the target wellbore with the electromagnetic transmitter; measuring at least one component of an electromagnetic signal from the target wellbore with the electromagnetic receiver; and determining at least one ranging parameter of the target wellbore based, at least in part, on the at least one component of the electromagnetic field measured by the electromagnetic receiver.

Abstract: Systems and methods for active ranging-while-drilling (ARWD) for collision avoidance and/or well interception. A method for electromagnetic ranging of a target wellbore may comprise disposing a downhole measurement tool into a wellbore, wherein the downhole measurement tool may comprise receivers comprising at least one radially spaced pair of the receivers and at least one axially spaced pair of the receivers; performing field measurements with the receivers, where a first set of field measurements are from at least one radially spaced pair of the receivers, and a second set of field measurements are from at least one axially spaced pair of the receivers; and calculating at least one target well parameter of a target well from at least one of the first set of field measurements and the second set of field measurements.

Abstract: A method and system for wellbore ranging. A method for wellbore ranging may comprise placing a coil antenna in a wellbore, wherein the coil antenna may comprise one or more coil windings, and the coil windings comprise a magnetic material. The method may further comprise measuring a characteristic of an induced electromagnetic field with the coil antenna. A system for wellbore ranging may comprise an electromagnetic ranging tool which may further comprise a coil antenna, wherein the coil antenna comprises one or more coil windings, and wherein the coil windings comprise a magnetic material. The method may further comprise an information handling system, wherein the information handling system may be operable to measure a characteristic of an induced electromagnetic field with the coil antenna.

Abstract: A method and system for identifying a target well. A system for identifying a target well may comprise placing an electromagnetic ranging tool in a wellbore, transmitting an electromagnetic field into a formation, inducing an eddy current within a target well, measuring a second electromagnetic field from the target well, calculating a position or an orientation of a transmitter or a receiver relative to another position, and calculating at least one parameter of the target well. An electromagnetic ranging system may comprise an electromagnetic ranging tool and an information handling system. The information handling system may be operable to calculate a position and/or an orientation of a transmitter or a receiver relative to another position on the electromagnetic ranging tool disposed on a borehole assembly, and calculate at least one parameter of a target well from the calculated position or orientation of the transmitter and the receiver.

Abstract: A system includes a drillstring in a first borehole. The drillstring includes a magnet rotatable about an axis of the drillstring. The system further includes at least one fiber optic sensor deployed in a second borehole for generating electromagnetic (EM) field measurements in response to a magnetic field produced by rotation of the magnet about the axis of the drillstring. The system further includes a processor in electronic communication with the at least one fiber optic sensor to determine a distance or direction of the magnet relative to the at least one fiber optic sensor based on the EM field measurements.

Abstract: An electromagnetic ranging system and method for location a target well. The electromagnetic ranging system may comprise a modular electromagnetic ranging tool. The electromagnetic ranging tool may comprise at least one transmitter coil and a receiver coil operable to measure at least one component of the electromagnetic field. An information handling system may be in signal communication with the modular electromagnetic ranging tool. A method for electromagnetic ranging of a target wellbore may comprise disposing a modular electromagnetic ranging tool in a wellbore, transmitting an electromagnetic field to the target wellbore from at least one transmitter coil disposed on the modular electromagnetic ranging tool, measuring at least one component of a secondary electromagnetic field, and determining a relative location of the target wellbore from at least measurements by the at least one receiver coil and one or more parameters of the at least one transmitter coil.

Abstract: A rotating coil antenna tool apparatus includes a transmitter coil and a receiver coil that are used for ranging to a target well. The transmitter coil transmits a first electromagnetic signal and the receiver coil receives second electromagnetic signal. At least one of the transmitting coil or the receiver coil is rotating while transmitting or receiving their respective signals. The receiver coil is inhibited from receiving the first electromagnetic signal. A relative distance and/or direction to the target well is determined based on the second electromagnetic signal.

Abstract: A method and system for wellbore ranging. A method for wellbore ranging may comprise placing a coil antenna in a wellbore, wherein the coil antenna may comprise one or more coil windings, and the coil windings comprise a magnetic material. The method may further comprise measuring a characteristic of an induced electromagnetic field with the coil antenna. A system for wellbore ranging may comprise an electromagnetic ranging tool which may further comprise a coil antenna, wherein the coil antenna comprises one or more coil windings, and wherein the coil windings comprise a magnetic material. The method may further comprise an information handling system, wherein the information handling system may be operable to measure a characteristic of an induced electromagnetic field with the coil antenna.

Abstract: Systems and methods for active ranging-while-drilling (ARWD) for collision avoidance and/or well interception. A method for ranging while drilling may comprise employing a rotating magnet assembly to induce a changing magnetization and/or electric current in a conductive member disposed in a target wellbore, wherein the rotating magnet assembly may be employed in a second wellbore; measuring at least one component of a magnetic gradient tensor using receivers; and calculating a relative location of the conductive member based at least in part on the measurements of the at least one component of the magnetic gradient tensor.

Abstract: A system includes a drillstring in a first borehole. The drillstring includes a magnet rotatable about an axis of the drillstring. The system further includes at least one fiber optic sensor deployed in a second borehole for generating electromagnetic (EM) field measurements in response to a magnetic field produced by rotation of the magnet about the axis of the drillstring. The system further includes a processor in electronic communication with the at least one fiber optic sensor to determine a distance or direction of the magnet relative to the at least one fiber optic sensor based on the EM field measurements.

Abstract: A magnetic ranging system, in some embodiments, comprises: a wellbore in a formation; a conductive casing in said wellbore; and excitation and return electrodes electrically coupled to the conductive casing, the excitation electrode positioned downhole relative to the return electrode, the excitation and return electrodes generating a current in the casing, said current resulting in an electromagnetic signal that propagates through said formation toward a sensor in another wellbore.

Abstract: A surface excitation ranging method includes selecting a first well with a metal casing as a target well and selecting a second well with a metal casing as a ground well. The method also includes installing a supplemental grounding arrangement for a power supply located at earth's surface, wherein the ground well and the supplemental grounding arrangement fulfill an impedance criteria or ranging performance criteria. The method also includes conveying an electrical current output from the power supply along the target well. The method also includes sensing electromagnetic (EM) fields emitted from the target well due to the electrical current. The method also includes using distance or direction information obtained from the sensed EM fields to guide drilling of a new well relative to the target well.

Abstract: A system includes a gradient sensor arrangement deployed in a first borehole, the gradient sensor arrangement having a plurality of spaced sensors at a single measured depth position. The system also includes an electromagnetic (EM) transmitter deployed in a second borehole. The system also includes a processor configured to determine a distance or direction of the EM transmitter relative to the gradient sensor arrangement based on EM field measurements collected by the gradient sensor arrangement in response to an EM field emitted by the EM transmitter. The system also includes a directional drilling controller configured to update a trajectory for either the first borehole or the second borehole in response to the determined distance or direction.

Abstract: An electromagnetic ranging system and method for location a target well. The electromagnetic ranging system may comprise a modular electromagnetic ranging tool. The electromagnetic ranging tool may comprise at least one transmitter coil and a receiver coil operable to measure at least one component of the electromagnetic field. An information handling system may be in signal communication with the modular electromagnetic ranging tool. A method for electromagnetic ranging of a target wellbore may comprise disposing a modular electromagnetic ranging tool in a wellbore, transmitting an electromagnetic field to the target wellbore from at least one transmitter coil disposed on the modular electromagnetic ranging tool, measuring at least one component of a secondary electromagnetic field, and determining a relative location of the target wellbore from at least measurements by the at least one receiver coil and one or more parameters of the at least one transmitter coil.

Abstract: A surface excitation ranging method includes installing a customized grounding arrangement for a power supply located at earth's surface, wherein the customized grounding arrangement fulfills an impedance criteria or ranging performance criteria. The method also includes conveying an electrical current output from the power supply along a target well with a metal casing. The method also includes sensing electromagnetic (EM) fields emitted from the target well due to the electrical current. The method also includes using distance or direction information obtained from the sensed EM fields to guide drilling of a new well relative to the target well.

Abstract: Disclosed embodiments include well ranging apparatus, systems, and methods which operate to receive normal and tangential components of electromagnetic field strength measurements within a first well as a set of field strength components from at least one sensor, wherein the at least one sensor is used to take multiple azimuthal field strength measurements at a single depth. Further activities include determining an approximate range from the at least one sensor to a second well that serves as a source of an electromagnetic field, via direct transmission or backscatter transmission, when a ranging direction associated with a housing upon which the at least one sensor is mounted is unknown. Additional apparatus, systems, and methods are disclosed.

Abstract: A method and system for identifying a target well. A system for identifying a target well may comprise placing an electromagnetic ranging tool in a wellbore, transmitting an electromagnetic field into a formation, inducing an eddy current within a target well, measuring a second electromagnetic field from the target well, calculating a position or an orientation of a transmitter or a receiver relative to another position, and calculating at least one parameter of the target well. An electromagnetic ranging system may comprise an electromagnetic ranging tool and an information handling system. The information handling system may be operable to calculate a position and/or an orientation of a transmitter or a receiver relative to another position on the electromagnetic ranging tool disposed on a borehole assembly, and calculate at least one parameter of a target well from the calculated position or orientation of the transmitter and the receiver.

Abstract: A rotating coil antenna tool apparatus includes a transmitter coil and a receiver coil that are used for ranging to a target well. The transmitter coil transmits a first electromagnetic signal and the receiver coil receives second electromagnetic signal. At least one of the transmitting coil or the receiver coil is rotating while transmitting or receiving their respective signals. The receiver coil is inhibited from receiving the first electromagnetic signal. A relative distance and/or direction to the target well is determined based on the second electromagnetic signal.

Abstract: A method includes cementing a target well with a target well cement comprising resistive cement having resistivity that is greater than a resistivity of a subsurface formation through which the target well passes. The method includes injecting an injected signal into a conductive casing material at least partially surrounded by the target well cement. The method also includes receiving a resulting signal that results from the injecting at a signal receiver disposed within at least one of the target well and a drilling well separated from the target well.

Abstract: Systems and methods for active ranging-while-drilling (ARWD) for collision avoidance and/or well interception. A method for electromagnetic ranging of a target wellbore may include disposing an electromagnetic ranging tool in a wellbore, wherein the electromagnetic ranging tool comprises an electromagnetic transmitter and an electromagnetic receiver; exciting a subterranean formation with the electromagnetic transmitter; adjusting at least one orientation of the electromagnetic transmitter, the electromagnetic receiver, or both the electromagnetic transmitter and the electromagnetic receiver; exciting the target wellbore with the electromagnetic transmitter; measuring at least one component of an electromagnetic signal from the target wellbore with the electromagnetic receiver; and determining at least one ranging parameter of the target wellbore based, at least in part, on the at least one component of the electromagnetic field measured by the electromagnetic receiver.