Wavelet Transformation Tool

Plug-in interface

The user has the option of generating attributes for either inline, crossline, whole cube or 2D seismic data. Output can be realized in ZGY format or can be saved directly in SEGY format.

Plug-in Overview

The "Wavelet transformation tool" plug-in for Petrel provides tools for spectral decomposition of seismic data by Continuous Wavelet Transform (CWT) or Short Time Fourier Transform (STFT).

Specifications

• Wavelet transform can be applied to the seismic data, which can be either a 2D line or 3D Inline/Xline or 3D cube.
• All possible options for wavelet transformation included. For example, Morlet wavelet provides better resolution at higher frequency, while Ricker wavelet gives better resolution at lower frequency.
• Option for STFT and CWT.
• Intuitive GUI.
• Efficient and highly accurate algorithms.
• Wavelet coefficients relates to the changes detected in the signal (for seismic data: changes in bed thickness, singularities, etc.).

Features

All possible options for spectral decomposition are included: The plug-in allows the user to perform wavelet transformation with six different algorithms. These are divided in two broad categories: Continuous Wavelet Transform (CWT) and Short Time Fourier Transform (STFT). Under the CWT group, the user has the option of choosing Morlet, Ricker, or Haar wavelets. These different wavelets have different properties that may be suited for different data and different frequencies. Morlet wavelet is suited for all frequencies, but produces poor time resolution at lower frequencies. Ricker wavelet has shown to produce better result with seismic data at lower frequencies.