Electromagnetic Ranging Tool Tilt Angle Optimization
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Solution Overview
Problem
Existing electromagnetic ranging methods in subterranean operations face challenges in accurately determining the location of a target wellbore due to dominant direct signal interference, especially at lower frequencies, which complicates ranging measurements and can make them infeasible.
Innovation Solution
Adjusting the tilt angles between the transmitter and receiver orientations in the electromagnetic ranging tool to cancel direct coupling signals, allowing for stronger target wellbore signal detection and improved ranging accuracy, without requiring additional coil antennas or complex mechanical configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If electromagnetic ranging tools use direct signal transmission at lower frequencies, then the signal penetration capability is improved, but direct signal interference dominates and reduces measurement accuracy
Solution Approach 1:
The patent converts the harmful direct coupling signal into a beneficial component by using it as a reference for adaptive cancellation. The direct signal that previously dominated and reduced measurement accuracy is now utilized to generate cancellation signals that eliminate its interference, allowing lower frequency operation with improved measurement accuracy.
Solution Approach 2:
The patent dynamically adjusts the tilt angles of transmitter and receiver coils to optimize the ratio of target signal to direct signal. By changing the orientation parameters of the electromagnetic components, the system maximizes target wellbore signal detection while minimizing direct coupling interference, enabling accurate ranging at lower frequencies.
2Measurement precision
If additional coil antennas are added to cancel direct signals, then the direct signal interference is reduced, but the device complexity increases
Solution Approach 1:
The patent makes the existing transmitter and receiver coils multi-functional by adjusting their tilt angles. Instead of adding separate cancellation coils, the existing components perform both target signal detection and direct signal cancellation functions through optimized orientation, reducing device complexity while maintaining measurement precision.
Solution Approach 2:
The patent achieves direct signal cancellation by changing the orientation parameters (tilt angles) of existing coils rather than adding new components. This parameter-based solution maintains measurement precision while avoiding the increased device complexity that would result from additional coil antennas.
3Measurement precision
If complex mechanical configurations are used to adjust transmitter and receiver orientations, then the target signal detection is improved, but the ease of operation is reduced
Solution Approach 1:
The patent implements dynamic adjustment of transmitter and receiver coil orientations during the ranging operation. The tilt angles are adjusted in real-time to optimize signal detection, allowing the system to adapt to different operational conditions without requiring complex fixed mechanical configurations, thereby improving ease of operation.
Solution Approach 2:
The patent optimizes target signal detection by changing the orientation parameters of existing coils through controlled mechanical adjustment. Rather than using complex mechanical configurations, the system adjusts tilt angles as operational parameters, simplifying the mechanical design while maintaining improved target signal detection capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the accuracy of ranging measurements by eliminating direct signal interference, enabling precise determination of target wellbore location and reducing errors, even in layered formations, without the need for additional equipment or complex mechanical adjustments.
Implementation Method 1
inducing a current on a conductive member by transmitting electromagnetic fields by coil antennas positioned in a second wellbore. The induced current in turn may cause the casing to radiate a secondary electromagnetic field
Implementation Method 2
The induced current in turn may cause the casing to radiate a secondary electromagnetic field
Implementation Method 3
The gradient of the magnetic field radiated by the conductive member in addition to the magnetic field itself may be measured. Using a relationship between the magnetic field and its gradient, a ranging measurement may be calculated
Data Source
AI summary
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.