Seismic Repeatability Metric via Shot-Receiver Pair Matching
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Solution Overview
Problem
Current methods lack an effective solution for determining the repeatability of multiple shot-receiver pairs in seismic acquisition, which is crucial for time-lapse seismic technology, especially in offshore streamer modes, where existing techniques only evaluate single shot-receiver pairs and fail to provide consistency analysis for multiple pairs.
Innovation Solution
A method and device that select baseline and monitor observation systems within a predetermined range, match multiple shot-receiver pairs to establish matching relationships, and calculate overall geometry repeatability using a specific formula, taking the minimum value as the overall geometry repeatability metric between systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing techniques evaluate only single shot-receiver pairs, then the evaluation method is simple, but the repeatability determination is incomplete for multiple shot-receiver pairs
Solution Approach 1:
The patent segments the evaluation process into distinct components: selecting baseline and monitor observation systems, matching shot-receiver pairs, calculating repeatability for each pair, and determining overall repeatability. This segmentation allows comprehensive evaluation of multiple shot-receiver pairs while maintaining clear methodology.
Solution Approach 2:
The patent transitions from evaluating single shot-receiver pairs (one-dimensional) to evaluating multiple shot-receiver pairs simultaneously (multi-dimensional). By introducing multiple dimensions of comparison across different shot-receiver pairs, the method achieves comprehensive repeatability determination.
2Reliability
If multiple shot-receiver pairs are evaluated comprehensively, then the repeatability metrics are more accurate, but the calculation complexity increases
Solution Approach 1:
The patent performs preliminary actions by pre-selecting baseline and monitor observation systems and pre-matching shot-receiver pairs before the actual repeatability calculation. This preliminary organization simplifies the subsequent calculation process and ensures reliable comparison foundations.
Solution Approach 2:
The patent calculates repeatability for each individual shot-receiver pair and then determines the overall repeatability by selecting the minimum value. This partial evaluation approach (evaluating each pair separately) ensures comprehensive coverage while using a simplified aggregation method (minimum selection) to determine overall reliability.
3Measurement precision
If shot-receiver pairs are matched across different observation systems, then the repeatability of multiple pairs can be determined, but the matching complexity increases
Solution Approach 1:
The patent uses shot-receiver pair matching as an intermediary step between selecting observation systems and calculating repeatability. This intermediary matching process establishes corresponding relationships between baseline and monitor systems, facilitating accurate multi-pair repeatability measurement while managing complexity through structured pairing.
Data Source
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AI summary
The present invention provides a method and device for determining overall metrics of seismic geometry repeatability, wherein the method comprises: selecting baseline geometry and monitor geometry; matching shot-receiver pairs of the baseline geometry with shot-receiver pairs of the monitor geometry to obtain multiple matching relationships; calculating for the multiple matching relationships according to a predetermined calculation formula for multi-trace geometry repeatability, to obtain overall geometry repeatability corresponding to each of the multiple matching relationships; taking the minimum value of the overall geometry repeatability corresponding to each of the multiple matching relationships as overall repeatability metrics between the monitor geometry and the baseline geometry. In the embodiments of the present invention, by using the above method, the situation of different number and uncertain matching of shot-receiver pairs between the baseline geometry and the monitor geometry can be solved, the aim of accurately determining repeatability of multiple shot-receiver pairs in time-lapse seismic acquisition can be achieved, and thus the monitoring efficiency of seismic geometry repeatability can be improved.