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Auto-correlation, Source wavelet estimation, Signal processing

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@struct
@struct
 
 
SOURCE_OUTPUT_FILE
SOURCE_OUTPUT_FILE
 
 
private
private
 
 
AGCgain.m
AGCgain.m
 
 
Auto-correlation.png
Auto-correlation.png
 
 
LICENCE.txt
LICENCE.txt
 
 
README.md
README.md
 
 
SOURCE_WAVELET_ESTIMATION.m
SOURCE_WAVELET_ESTIMATION.m
 
 
Source wavelet (positive-negative time).png
Source wavelet (positive-negative time).png
 
 
Source wavelet.png
Source wavelet.png
 
 
add_curve_type.m
add_curve_type.m
 
 
add_header.m
add_header.m
 
 
add_parameter.m
add_parameter.m
 
 
amplitude spectrum.png
amplitude spectrum.png
 
 
amplitude spectrum_all_traces.png
amplitude spectrum_all_traces.png
 
 
auto_correlation_map.m
auto_correlation_map.m
 
 
bpf_fir.m
bpf_fir.m
 
 
clip.m
clip.m
 
 
compare_2d_data.m
compare_2d_data.m
 
 
ddid.m
ddid.m
 
 
default_seismic_colormap.m
default_seismic_colormap.m
 
 
ds_add_header.m
ds_add_header.m
 
 
ds_add_parameter.m
ds_add_parameter.m
 
 
ds_header.m
ds_header.m
 
 
ds_header_sort.m
ds_header_sort.m
 
 
ds_unit_conversion.m
ds_unit_conversion.m
 
 
extracting_cmp.m
extracting_cmp.m
 
 
extracting_cmp_fold_num.m
extracting_cmp_fold_num.m
 
 
extracting_geometry.m
extracting_geometry.m
 
 
extracting_shots.m
extracting_shots.m
 
 
extracting_shots_cmp.m
extracting_shots_cmp.m
 
 
fista.m
fista.m
 
 
fivekmoffsettest.m
fivekmoffsettest.m
 
 
fk.m
fk.m
 
 
fwi_AMC_pattern_2D_synt600.m
fwi_AMC_pattern_2D_synt600.m
 
 
fx.m
fx.m
 
 
fx_revised.m
fx_revised.m
 
 
helpx.m
helpx.m
 
 
iac.m
iac.m
 
 
ifft_dfh_2.m
ifft_dfh_2.m
 
 
inverse_filter.m
inverse_filter.m
 
 
keep.m
keep.m
 
 
l_append.m
l_append.m
 
 
l_average.m
l_average.m
 
 
l_check.m
l_check.m
 
 
l_combine.m
l_combine.m
 
 
l_compare.m
l_compare.m
 
 
l_convert.m
l_convert.m
 
 
l_crossplot.m
l_crossplot.m
 
 
l_curve.m
l_curve.m
 
 
l_curve_math.m
l_curve_math.m
 
 
l_data.m
l_data.m
 
 
l_depth2index.m
l_depth2index.m
 
 
l_depth2time.m
l_depth2time.m
 
 
l_depth2wb_depth.m
l_depth2wb_depth.m
 
 
l_elastic_impedance.m
l_elastic_impedance.m
 
 
l_eqdepth.m
l_eqdepth.m
 
 
l_extend.m
l_extend.m
 
 
l_fill_gaps.m
l_fill_gaps.m
 
 
l_gc.m
l_gc.m
 
 
l_gd.m
l_gd.m
 
 
l_gu.m
l_gu.m
 
 
l_histoplot_1d.m
l_histoplot_1d.m
 
 
l_interpolate.m
l_interpolate.m
 
 
l_itt2vel.m
l_itt2vel.m
 
 
l_litho_plot.m
l_litho_plot.m
 
 
l_lithocurves.m
l_lithocurves.m
 
 
l_lithoplot.m
l_lithoplot.m
 
 
l_merge.m
l_merge.m
 
 
l_plot.m
l_plot.m
 
 
l_plot1.m
l_plot1.m
 
 
l_principal_components.m
l_principal_components.m
 
 
l_redefine.m
l_redefine.m
 
 
l_reflection_coefficients.m
l_reflection_coefficients.m
 
 
l_reflections.m
l_reflections.m
 
 
l_regression.m
l_regression.m
 
 
l_rename.m
l_rename.m
 
 
l_resample.m
l_resample.m
 
 
l_rm_nulls.m
l_rm_nulls.m
 
 
l_seismic_acoustic.m
l_seismic_acoustic.m
 
 
l_seismic_elastic.m
l_seismic_elastic.m
 
 
l_select.m
l_select.m
 
 
l_sonic2time.m
l_sonic2time.m
 
 
l_sort.m
l_sort.m
 
 
l_subtract_ekb.m
l_subtract_ekb.m
 
 
l_switch_depth.m
l_switch_depth.m
 
 
l_tools.m
l_tools.m
 
 
l_trend_removal.m
l_trend_removal.m
 
 
l_unit_conversion.m
l_unit_conversion.m
 
 
lfigure.m
lfigure.m
 
 
mute_make.m
mute_make.m
 
 
mwigb.m
mwigb.m
 
 
my_xcorr.m
my_xcorr.m
 
 
mycolormap.m
mycolormap.m
 
 
mysuptitle.m
mysuptitle.m
 
 
mytitle.m
mytitle.m
 
 
nan_mean.m
nan_mean.m
 
 
nmo.m
nmo.m
 
 
nmo_correction.m
nmo_correction.m
 
 
pfigure.m
pfigure.m
 
 

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Source wavelet estimation

The autocorrelation of seismic signals can provide some preliminary information about the source. 

The code SOURCE_WAVELET_ESTIMATION.m was written to auto-correlate two files of seismic data in Segy format (synthetic_data1.segy and synthetic_data2.segy). The source wavelet is estimated based on the autocorrelation, and its amplitude and phase spectra can be found in the folder.  The estmated source can be found in the folder SOURCE_OUTPUT_FILE.

A) Auto-correlation of seismic signals:

B)Estimated source wavelet:

C)Amplitude spectrum of the source:

C)Phase spectrum of the source:

DISCLAIMER: I don't warrant this code in any way whatsoever. This code is provided "as-is" to be used at your own risk.

This work was done as part of my PhD, I would be happy if you could cite my PhD thesis: Seismic tomography of an amagmatic ultra-slow spreading ridge https://theses.hal.science/tel-04020124/

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Auto-correlation, Source wavelet estimation, Signal processing

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time-series signal-processing seismology wavelet autocorrelation time-series-analysis

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