Seismic Poynting Vector Stabilization via Derivative Amplitude Adjustment
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Solution Overview
Problem
Poynting vector computation in seismic exploration is unstable due to zero derivative values at the peak and trough of seismic wavelets, affecting data processing quality.
Innovation Solution
Adjust the amplitude of the time derivative of the seismic wavefield and compute the Poynting vector of the adjusted time derivative to obtain a first Poynting vector, then operate on this with a second Poynting vector to stabilize the final Poynting vector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Poynting vector computation is performed using time derivative of seismic wavefield, then computational efficiency is improved, but computation stability deteriorates due to zero derivative values at peak and trough of wavelets
Solution Approach 1:
The patent introduces an amplitude adjustment factor to modify the time derivative of the seismic wavefield. This parameter change transforms the original time derivative into an adjusted version with enhanced amplitude characteristics, ensuring that the adjusted derivative maintains non-zero values at critical points (peak and trough of wavelets) while preserving the computational efficiency of the Poynting vector method.
2Reliability
If amplitude of time derivative is adjusted to avoid zero values, then computation stability is improved, but computational complexity increases
Solution Approach 1:
The patent applies a simple amplitude adjustment factor (a scalar value) to the time derivative, which is computationally inexpensive. This parameter change approach avoids complex transformations while effectively preventing zero values in the derivative, thus improving stability without significantly increasing computational complexity.
Data Source
AI summary
The present disclosure provides a method and system for stabilizing a Poynting vector of a seismic wavefield. The method includes: adjusting an amplitude of a time derivative of the seismic wavefield, and computing a Poynting vector of the adjusted time derivative of the seismic wavefield to obtain a first Poynting vector, where a difference between the amplitude of the first Poynting vector and the amplitude of a second Poynting vector is within a set range, and the second Poynting vector belongs to the seismic wavefield; and conducting operation on the second Poynting vector and the first Poynting vector to obtain a final Poynting vector of the seismic wavefield. The present disclosure addresses instability of Poynting vectors computation.