Seismic Interference Attenuation via Residual Data Segmentation
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Solution Overview
Problem
Seismic interference in marine seismic surveys, caused by temporal overlap of controlled and uncontrolled sources, leads to noise contamination and requires substantial processing to attenuate, often resulting in signal leakage and reduced data quality.
Innovation Solution
The method involves separating recorded seismic data into coherent and residual portions, where seismic interference is attenuated from the residual portion, utilizing coherency measures in data domains like common channel, common receiver, and common depth point, and applying source separation techniques to isolate and remove interference energy, thereby preserving reflection energy in the coherent portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If substantial processing is applied to attenuate seismic interference, then interference attenuation is improved, but signal leakage increases and data quality deteriorates
Solution Approach 1:
The seismic data is segmented into coherent portions and residual portions. The coherent portion contains the desired reflection energy while the residual portion contains the interference. By processing only the residual portion, the method achieves interference attenuation while preserving the coherent reflection energy, thus avoiding signal leakage and maintaining data quality.
Solution Approach 2:
The interference energy is extracted from the residual portion of the seismic data through coherency measures in various data domains. By isolating and removing only the incoherent interference components while leaving the coherent reflection energy intact, the method achieves effective interference attenuation without causing signal leakage or degrading overall data quality.
2Measurement precision
If coherency measures are applied in data domains, then noise removal quality is improved, but processing complexity increases
Solution Approach 1:
The processing is segmented into distinct stages: separating coherent and residual portions, applying coherency measures specifically to the residual portion, and recombining the results. This segmentation allows complex coherency-based noise removal to be applied selectively only where needed, reducing overall processing complexity while maintaining high noise removal quality.
Solution Approach 2:
Coherency measures are applied locally to the residual portion rather than to the entire seismic dataset. This localized application of complex processing techniques achieves high noise removal quality in the interference-containing regions while avoiding unnecessary processing of the coherent reflection energy, thereby reducing overall processing complexity.
Data Source
AI summary
The present disclosure is related to methods, systems, and machine-readable media for interference attenuation of a residual portion of seismic data, such as may be recorded in a marine seismic survey. Recorded seismic data can be separated into a portion attributed to a source and a residual portion. Seismic interference attenuation can be performed on the residual portion.