Seismic Tool Array Synchronization via Downhole Clock
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Solution Overview
Problem
Current seismic data collection in oil and natural gas production is limited by the inability to effectively synchronize and combine multiple seismic tool arrays, resulting in reduced data quality and quantity during drilling operations.
Innovation Solution
The implementation of downhole clock synchronization technology to synchronize multiple seismic tool arrays, enabling a master-slave arrangement and synchronized downhole clock domains, which enhances data collection by increasing the number of seismic sensors and improving data fidelity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple seismic tool arrays are combined to increase the number of sensors, then the quantity of seismic data collected is improved, but the synchronization and coordination between arrays becomes more difficult
Solution Approach 1:
The system divides the seismic tool arrays into master and slave groups, with each array having its own controller that can independently manage synchronization. This segmentation allows each controller to handle synchronization tasks for its respective arrays while communicating with a master controller, reducing the overall complexity compared to a fully centralized approach.
Solution Approach 2:
The master controller acts as an intermediary between slave controllers and the surface system. It receives synchronization commands from the surface and distributes them to slave controllers, which then coordinate their respective arrays. This intermediary structure simplifies the communication architecture and reduces the burden on individual array controllers.
2Measurement precision
If multiple seismic tool arrays are synchronized to improve data quality, then the measurement precision is improved, but the device complexity increases due to synchronization requirements
Solution Approach 1:
The system implements feedback mechanisms where slave controllers report their synchronization status and timing information to the master controller. The master controller adjusts synchronization commands based on this feedback to maintain precise timing across all arrays. This feedback loop ensures high measurement precision while automating the complexity management.
Solution Approach 2:
The system dynamically adjusts timing parameters and synchronization intervals based on operational conditions. Controllers can modify sampling rates, trigger intervals, and synchronization thresholds to optimize data quality while reducing computational complexity when full precision is not required.
3Reliability
If downhole clock synchronization is implemented to enhance data collection, then the data fidelity is improved, but the device complexity and operational difficulty increase
Solution Approach 1:
Slave controllers automatically adjust their internal clocks and synchronization timing based on commands from the master controller without requiring manual intervention. The system self-calibrates by comparing timing information and automatically correcting drift, maintaining high data fidelity while reducing operational complexity.
Solution Approach 2:
The system performs preliminary synchronization setup and calibration before actual seismic data collection begins. Controllers establish timing relationships and test synchronization during an initialization phase, ensuring that data fidelity is optimized before production operations start, thereby simplifying ongoing operations.
Data Source
AI summary
A technique facilitates accumulation of information via arrays of seismic tools to enable improved assessment of subterranean reservoirs. A plurality of seismic tool arrays may be combined to increase the quantity of downhole seismic tools, e.g. sensors. The seismic tool arrays are synchronized, via downhole clock synchronization technology, in a manner which enhances seismic data collection via the combined seismic tool arrays. In drilling applications, the seismic tool arrays may be combined with a bottom hole assembly. For example, multiple seismic tool arrays may be combined in a logging-while-drilling platform.