Code covered by the BSD License  

Highlights from
SeisLab 3.01

4.44444

4.4 | 18 ratings Rate this file 220 Downloads (last 30 days) File Size: 2.9 MB File ID: #15674
image thumbnail

SeisLab 3.01

by

 

24 Jul 2007 (Updated )

Release 10.0301 of a collection of functions for analysis/display of seismic and well-log data.

| Watch this File

File Information
Description

A set of about 170 functions (plus support functions called by them) for analysis and display of exploration-seismic data and well logs. These functions read and write seismic data in standard SEG-Y format, read and write well logs in LAS-format 2.0 (also read LAS-format 3.0), and perform many of the manipulations usually performed on these data types. They use standardized structures to represent seismic data and well data and thus allow simple concatenation of function calls.

The functions come with a manual in PDF format and scripts with examples. Several versions of Matlab were released during their development. Presently, I run them under R2007b, but I try not to use Matlab syntax introduced after R2007a. Also, SeisLab 2.01, which works with Matlab 6.1 (2001) and higher, can still be downloaded from the Matlab File Exchange (file 8827).

Generally, I make an effort to avoid functions from toolboxes; however, I am aware of at least one call to a function in the Optimization Toolbox.

In case you already have SeisLab installed you can find its distribution ID by typing "ddid" at the Matlab prompt. If you get the error message "Undefined function or variable 'ddid'." then you have the very first release of SeisLab. Otherwise, compare the distribution ID with that of this release. If it is lower then this release is newer.

Major changes in SeisLab 3.0:

Some functions require Matlab R2007a or higher.

Representation of seismic data and log data in single-precision or double-precision with trivial conversion from one into the other via overloaded functions "single" and "double". This means datasets can be about twice as big.

LAS-file reader rewritten; reads LAS 2.0 and 3.0 files;
the old LAS-file reader (LAS 2.0 only) is still available as "read_las2_file". It is somewhat faster.

SEG-Y file reader rewritten. For large files it is much faster than the previous one; even more so if IBM to IEEE conversion is required. The original SEG-Y reader is still available as "read_segy_file_legacy".

Display of volumes of seismic data in form of slices, contour slices, iso-surfaces ("s_volume_browser"). Slices can be static or animated. The volume-browser software is no longer included in this distribution as it is on a different update schedule. If you don't have it you can download the latest version from the Matlab File Exchange (file 13526).

Faster and more accurate seismic plots.

EXAMPLE (used to plot the attached figure):

% Read interactively selected SEG-Y file
seismic = read_segy_file;

% Make a volume plot of the data read
s_volume_browser(seismic);

Acknowledgements

Adv Exp Fig, Printing Matlab Errors (R14sp3 And Later), Showcell & Cell\Disp, Line Wrap A String, and Vector Norm inspired this file.

MATLAB release MATLAB 7.4 (R2007a)
Other requirements Developed on a PC under Windows, but should work on other platforms as well.
Tags for This File   Please login to tag files.
Please login to add a comment or rating.
Comments and Ratings (25)
17 Sep 2014 tarun

does it still has picking amplitude of individual traces capability? I thought S_spicks command achieves it but it is no longer seems to be available in the program suite.
I would like to know how I can pick these amplitude off from the seismic wiggle trace...Can somebody help?

15 Sep 2014 Adam  
17 Apr 2014 Paul Edigbue

Hi
Anybody that knows how to generate synthetic 3D seismic trace, just about 12 or 24 traces, show pls help me. I need matlab code that could do it for me.

01 Apr 2014 kaiba Wong

Hi there, I was using Seislab and for no reason it starts giving me error even after I re-downloaded it. I am having with this particular function: s_log2reflectivity

after running presets.. I get this error:
Error using struct/moperation (line 37)
Operation "*" is not defined for these two arguments

Error in * (line 15)
ds=moperation(i1,i2,'*');

Error in l_curve (line 41)
beta = U'*b; beta2 = norm(b)^2 - norm(beta)^2;

Error in l_depth2time (line 194)
wlog=l_curve(wlog,param.action,mnem_out,temp,'ms',param.description);

Error in s_log2reflectivity (line 64)
wlog1=l_depth2time(wlog1,{'output',cm.twt});

if anyone has a solution for this, it will be extremely helpful. Please let me know what is wrong. I did not alter the original code. Thanks in advance.

12 Mar 2014 peter  
04 Mar 2014 anusha js  
08 Feb 2013 Joseph Jennings

Hi,

I need help using the l_compare function. When I attempt to compare different logs and change each log's depth so they all have the same vertical scale, I get the following error:

Error using assign_input (line 116)
There is a problem with the input arguments of function
"l_compare".

Error in l_compare (line 95)
compare=assign_input(compare,argument(3:end));

Error in Project3 (line 31)
l_compare({wellLog11, 'RILD',{'color','b'}, {'linewidth'
1},{'depths',4500,5000}},...

Does anyone know what I am doing wrong?

This is my code for the l_compare function:

l_compare({wellLog11, 'RILD',{'color','b'}, {'linewidth' 1},{'depths',4500,5000}},...
{wellLog13, 'RILD',{'color','b'}, {'linewidth' 1},{'depths',4500,5000}}, ...
{wellLog7, 'RILD', {'color','b'}, {'linewidth' 1},{'depths',4500,5000}}, ...
{wellLog18d, 'RILD', {'color','b'}, {'linewidth' 1},{'depths',4500,5000}}, ...
{wellLog15, 'RILD', {'color','b'}, {'linewidth' 1},{'depths',4500,5000}});

Thanks in advance.

05 Jun 2012 Nam Nicholas  
25 Apr 2012 wang  
10 Jan 2012 Dave  
13 Dec 2011 Pit D  
18 Jul 2011 Vaughn

I notice among the "list_of_seismic_functions" one call "s_insert_deviated_synthetic". But there's no corresponding m-file. Will this function be available soon?

08 Dec 2010 Jorge Reveron

Hi,
I have a problem with memblock function when I try to read a 3D segy file. The problem is that memblock uses the commamnd:

temp=textscan(evalc('feature(''memstats'')'),'%s','delimiter','\n');

but textscan function requires how first argument a fid from file that it should be read.
Can I use an alternative function to scan 'feature(''memstats'')'?

Thanks

26 Mar 2010 Ravi

Excellent! As promised it is faster than the previous versions. I checked reading a 566 MB segy file and found that it is 2 times faster than the previous code on a HP- Z600 workstation with 4 GB RAM.
Thanks a lot for such a nice contribution!

26 Feb 2010 xiao gh

how can i get SEG-Y data?
I get the website (http://www.seg.org),but I can't find the place to download SEG-Y data.
Is somebody give some help?
thanks a lot!

19 Jan 2010 Todd Bredbeck

Very useful set of tools, especially the IO capabilities.

05 Jan 2010 Novrianto  
12 Mar 2009 William

Can this toolbox import 3D SEG-Y data? The graphic suggests yes, but I cannot figure out how to do this. An example would be most helpful.

14 Aug 2008 Ravi Srivastava

Overall toolbox is excellent, except that its hard to use for big data set.
I would appreciate if some one could let me know proper example of l_trend_removal.m

04 Mar 2008 li zhihui

Excellent.Thanks!

28 Feb 2008 Matthew Reilly  
11 Dec 2007 Xu Shanhui

Excellent!

20 Aug 2007 Bian Aifei  
30 Jul 2007 Wen-Tao Ma  
26 Jul 2007 Sonny Winardhi  
Updates
14 Jan 2008

Completely rewritten function "s_spectrum" with more options to display amplitude spectra and phase spectra.

The usual collection of bug fixes, added options and error trapping for existing functions.

17 Jan 2008

The previously uploaded file had a wrong Distribution ID.

28 Jan 2008

Bug fix in function "s_spectrum".

04 Jul 2009

Replaced the GNU Lesser General Public License by the BSD License as required by The MathWorks.

08 Jul 2009

Replaced the GNU Lesser General Public License by the BSD License as required by The MathWorks.

20 Jul 2009

Removed the last vestiges of the GNU license and added the manual, that had gone AWOL.

23 Feb 2010

Fixed a number of bugs (e.g. a bug in "write_segy_file" that showed up under Linux).
Added new option to "s_wplot".
Simplified parameter input.
More scripts with examples.
Updated and expanded manual.

01 Mar 2010

Fixed typo in a function statement

Contact us