Azimuth Rotation for Seismic Source Data Separation
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Solution Overview
Problem
Seismic surveying faces challenges in separating survey data from multiple seismic sources activated closely in time, leading to interference that reduces data acquisition rates and complicates data interpretation.
Innovation Solution
The method involves receiving and rotating survey data to model interference caused by subsets of seismic sources, using gradient and horizontal data to isolate contributions from individual sources, and applying adaptive subtraction techniques to remove interference, thereby enabling simultaneous source separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple seismic sources are activated closely in time to increase data acquisition rate, then productivity is improved, but interference between sources increases making data interpretation difficult
Solution Approach 1:
The patent segments the combined survey data into separate contributions from each seismic source by rotating the data to different azimuths corresponding to each source. This allows the interference problem to be solved by dividing the total signal into discrete source components that can be individually analyzed.
2Productivity
If survey data from multiple sources is combined to improve coverage, then productivity is improved, but the complexity of separating individual source contributions increases
Solution Approach 1:
The patent introduces azimuth as an additional dimension for data separation. By rotating the survey data to different azimuth angles corresponding to each seismic source location, the method transforms the complex multi-source separation problem into a series of directional projections that are computationally more manageable.
Data Source
AI summary
Separating survey data for multiple survey sources where first survey data along a first axis measured by a survey sensor device is received, the first survey data responsive to activations of the plurality of survey sources at respective azimuths with respect to the survey sensor device. Second survey data is rotated towards a first azimuth of a first of the plurality of survey sources. The rotated second survey data is used as a model of interference caused by a subset of the plurality of survey sources excluding the first survey source. In other examples, a time dithering technique is performed to separate survey data for multiple survey sources.