Wellbore Tool Antenna Calibration Scaling Factor
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Solution Overview
Problem
Wellbore tools, such as resistivity logging tools, face inaccuracies in measurements due to manufacturing defects and material variations among identical electromagnetic antennas, leading to inefficiencies and errors in wellbore operations.
Innovation Solution
A scaling factor is determined using decoupled measurements from electromagnetic antennas, which are then applied to adjust measurements taken by the wellbore tool, accounting for differences in dipole moments and tool face angles, thereby improving the accuracy of multi-component tensors and inversion results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If identical electromagnetic antennas are used in wellbore tools, then manufacturing complexity is reduced, but measurement precision deteriorates due to manufacturing defects and material variations
Solution Approach 1:
The patent applies parameter changes by introducing scaling factors that adjust the electromagnetic antenna responses to compensate for manufacturing variations. The scaling factors are determined through calibration processes that modify the apparent dipole moments and phase relationships, transforming the raw measurements into corrected values that account for individual antenna discrepancies while maintaining the simplicity of using identical antenna designs.
2Measurement precision
If calibration is performed for each antenna component, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by creating a calibration system that serves multiple functions: it characterizes individual antenna components, determines scaling factors for compensation, and provides corrected measurements all through a unified calibration process. The calibration apparatus and methods can be applied across different antenna configurations and wellbore tool types, making the complex calibration task manageable through standardized procedures.
3Manufacturing precision
If manufacturing tolerances are tightened, then manufacturing precision is improved, but productivity decreases
Solution Approach 1:
The patent applies preliminary action by performing calibration measurements and determining scaling factors before the wellbore tool is deployed for actual wellbore operations. This allows the tool to be calibrated in a controlled environment (such as air hang calibration) where the scaling factors can be pre-computed and stored, so that no additional calibration equipment or complex procedures are needed during the actual wellbore operation, thereby maintaining high productivity while achieving precise measurements.
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
The scaling factor approach enhances the accuracy of wellbore tool measurements, reduces amplitude and phase offsets, and provides consistent and reliable data for better geo-steering and wellbore operations.
Implementation Method 1
The wellbore tool can include a resistivity logging tool or other suitable wellbore tool that includes two or more electromagnetic antennas such as receivers
Data Source
AI summary
A system can calibrate inconsistencies in a wellbore tool. The system can receive a first set of measurements and a second set of measurements with respect to different electromagnetic antennas. The system can decouple a first multi-components tensor corresponding to the first set of measurements and a second multi-components tensor corresponding to the second set of measurements. The system can determine, using the decoupled first and second multi-components tensors, a scaling factor. The system can apply the scaling factor to a raw measurement received with respect to an electromagnetic antenna of the wellbore tool positioned in a wellbore to decouple a third multi-components tensor or to decoupled components of a fourth multi-components tensor for controlling a wellbore operation.