Open Data/Open Source: Seismic Unix scripts to process a 2D land line

Introduction

Seismic Unix (SU) is a popular open-source seismic processing software package (Stockwell, 1997; Cohen and Stockwell, 2010). The distribution includes some example processing scripts and three books that teach how to use the software are Seismic Processing with Seismic Un*x (Forel et al., 2005), Geophysical Image Processing with Seismic Unix (Stockwell, 2011), and Theory of Seismic Imaging (Scales, 1997) . These reference cover broad subjects including basic Unix commands, setting up a user environment, basic seismic processing, migration theory, programming, and advanced scripting for seismic processing. You can follow the text and recreate some seismic processing examples. These books do not provide good examples of geometry definition and how to load trace headers.

I hope to assist a processing geophysicst working or studing independently at a University or company that needs field data. I assume he is familiar with Seismic Unix. I providing example scripts, programs, and field data to process a 2D land line using the processing system. I describe the data acquisition and previous data processing. I provide the custom programs that load the trace headers. The scripts for data reformat to Seismic Unix format, header loading qc display, shot record velocity filter, deconvoution, CDP gather, velocity analysis, residual statics, stack, and post stack migration can be downloaded and this paper describes the scripts. This is a more complete processing sequence and a different dataset than provided in previous publications. The scripts provide the detailed parameters used by the Seismic Unix programs. The parameters for deconvolution, velocity filter, mute, moveout velocity, and scaling can adapted for use by other seismic processing systems. The results are similar to the results obtained in 1981 using GSI's proprietary software.

You can download Seismic Unix, the field data, and the scripts, and recreate my results. The scripts, data, and programs can be modified to validate your own seismic processing ideas. I intend the reader to use the paper and the scripts together to jump directly to a processing stage of interest to change parameters or programs to test alternative processing. This should accelerate the testing and validation of new seismic research, especially at universities and small companies that do not have large data archives and processing groups.

Open Data/Open Source: Seismic Unix scripts to process a 2D land line