Mixed Air-Hang Response Calibration for Modular Wellbore Tools
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Solution Overview
Problem
Conventional air-hang calibration methods for wellbore tools, particularly modularized wellbore tools like deep resistivity tools, face challenges due to large spacing between transmitters and receivers, making it difficult to hang the tools accurately and avoiding ground reflections, leading to inaccurate data collection and calibration.
Innovation Solution
A method to determine a mixed air-hang response by calculating coefficients for combinations of transmitters and receivers, using equations to combine air-hang responses from different transmitter-receiver pairs, allowing for improved calibration of formation signals in modularized wellbore tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional air-hang calibration methods are used for modularized wellbore tools with large spacing between transmitters and receivers, then the tools can be calibrated, but the calibration accuracy deteriorates due to difficulty in hanging the tools accurately and avoiding ground reflections
Solution Approach 1:
The calibration process is segmented into multiple independent air-hang responses, each corresponding to a specific transmitter-receiver pair. Each pair is calibrated separately and then combined through mathematical operations to produce the final mixed air-hang response, allowing accurate calibration despite large spacing requirements
Solution Approach 2:
The patent introduces an intermediary mathematical model that combines multiple air-hang responses into a mixed air-hang response. This model acts as a mediator between the individual calibrated pairs and the final calibration result, enabling accurate calibration without requiring the entire tool to be hung simultaneously
2Adaptability or versatility
If different combinations of transmitters and receivers are used in modularized wellbore tools, then the tool versatility is improved, but the calibration accuracy deteriorates due to varying air-hang responses
Solution Approach 1:
The patent creates a universal calibration approach that works for all possible transmitter-receiver combinations in the modularized tool. By calculating separate air-hang responses for each pair and then combining them mathematically, the system achieves accurate calibration regardless of which specific combinations are used, making the calibration process universal across all tool configurations
Solution Approach 2:
The patent changes the calibration parameters by calculating separate air-hang responses for each transmitter-receiver pair and then combining them through mathematical operations. This parameter transformation allows the system to accommodate different tool configurations while maintaining calibration accuracy through the mixed air-hang response calculation
Data Source
AI summary
Certain aspects of the present disclosure relate to calibrating a formation signal for a mixed set measurement device. A first air-hang response of a first measurement device for a tubular string associated with a drilling operation can be measured. A second air-hang response of a second measurement device for the tubular string associated with the drilling operation can be measured. The first air-hang response and the second air-hang response can be used to determine a mixed air-hang response of the mixed set measurement device. The mixed air-hang response can be used to calibrate a formation signal for the mixed set measurement device.