Seismic Shot Record Extension via Segmented Data Acquisition
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Solution Overview
Problem
Conventional seismic data acquisition techniques are limited by the need to record full records before another shot occurs, restricting the maximum record length and acquisition efficiency in seismic surveys.
Innovation Solution
The technique extends the record length by recording seismic data over a contiguous time period that includes the time preceding a shot and subsequent shots, allowing for the separation of signal interference from multiple shots, thereby creating an extended shot record that spans multiple shot intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional seismic data acquisition techniques are used to record full records before another shot occurs, then the recording process is simple and straightforward, but the maximum record length is restricted and acquisition efficiency is limited
Solution Approach 1:
The patent segments the seismic recording process by dividing the extended record into multiple datasets acquired during different time periods between shots. Each dataset captures a portion of the seismic signal, and these segments are later combined through processing to reconstruct the full extended shot record, thereby overcoming the limitation of individual record length constraints.
Solution Approach 2:
The patent performs preliminary recording of seismic data during multiple time periods before completing the full extended shot record. By acquiring data in advance across several intervals and then processing them together, the system prepares the necessary information beforehand to create records that extend beyond the conventional single-shot interval limitation.
2Duration of action of moving object
If the record length is extended to span multiple shot intervals, then faster data acquisition and deeper subsurface exploration are enabled, but signal interference from multiple shots must be separated
Solution Approach 1:
The patent extracts the desired seismic signal from the extended record by separating it from interfering signals produced by multiple shots. Through processing techniques applied to the multiple datasets, the system isolates and extracts the relevant seismic information corresponding to each shot, removing the harmful interference components to produce clean shot records.
Solution Approach 2:
The patent introduces an intermediary processing step that acts as a mediator between the raw extended seismic recordings and the final shot records. This intermediary processing stage performs the necessary signal separation and combination operations, transforming the complex multi-shot data into distinct, usable shot records without requiring direct manual intervention.
3Duration of action of moving object
If multiple datasets from different time periods are combined to generate shot records, then extended shot records spanning multiple shot intervals are created, but the data processing complexity increases
Solution Approach 1:
The patent merges multiple datasets acquired during different time periods to generate extended shot records. By combining these separate data collections through systematic processing, the system creates comprehensive records that span multiple shot intervals, achieving extended record length while managing the complexity through structured combination procedures.
Data Source
AI summary
A system includes an interface and a processor. The interface receives seismic datasets, which are associated with multiple firings of a set of at least one seismic source. Each dataset is acquired by seismic sensors during a different time period of a sequence of time periods that are limited by times at which the set of seismic source(s) are fired. The processor, for each of the firings of the set of seismic source(s), generates an associated shot record based on information contained at least two of the datasets.