Help link doesn’t work within the software
Modify the config.xml file on the <pdfreader> line to use the system installed reader. Most current systems come with Evince. You may also manually open the PDF files in the DOC folder of the installed application.
How do I install Linux products?
You will extract the contents of the tarball and place the license file in the (installation_folder)/license folder. Search for the machines.txt files in the subfolders and add the names of the machines in it. You can easily find them by executing “find . –type f –name ‘machines.txt’” and then editing the machines.txt files found. You will also need to make sure to configure SSH or RSH to not prompt for a password and run “installation_ssh.sh” or “installation_rsh.sh” for our surface seismic software and “instDownhole_ssh.sh” or “instDownhole_rsh.sh” for our downhole software. Then the software can be launched with “./GeoTomoSurfaceSeismic.sh” for our surface seismic software and “./GeoTomoDownholeSeismic.sh” for our downhole software.
How do I install Windows products from the .ZIP file?
You will extract the contents of the ZIP file into a folder without spaces. Please place the license we send you in the (installation_folder)/license directory. You will then execute the BAT file in the folder you extracted it into to launch the software.
I am running the Linux software through a Windows X11 emulator and having display problems
Traditionally we do not run our Linux software through X11 on Windows. We have found that certain Windows X11 window managers have problems displaying certain graphics elements of the software, including tabs, cursors, 2D/3D models, etc.
These problems arise when you may be using XMing for Windows. Please try to download and use Moba and make sure you are using “ssh –X” from the shell provided when you launch Moba.
I am setting the source depths to 0m when generating the synthetic seismograph, but since its FD modeling, the source needs to be buried below the free surface. How do I accomplish this?
For the 3D finite difference, we typically use a model that has the air velocity at the top of the model. As such, there will be multiple reflections generated due to the velocity contrast.
You can reduce the effect of the multiples by modifying your velocity model such that you extend the shallowest velocity up far above the surface to effectively remove that boundary.
Here is a link to a paper that talks about how the surface is handled that may be useful to you as well: http://www.geotomo.com/doc/SEG%2011%20FWI%20Tomography%20with%20Considerations%20for%20Large%20Topography%20Variations.pdf
I have a problem with a 2D model which is not ray tracing correctly when using the PS conversion optionThe problem is due to the round off issue on the grid size in the project (floating point decimal). You will need to specify the grid size when building the project so that the default grid size is not an integer.
Published on 20-OCT-2017
I have multiple segy files with geometry corrected and I would like to merge them
When working with a dataset and need to merge multiple SEGY files into a single SEGY file, you will use the Merge SEGY Files in the Utility menu in the launcher.
You will simply generate an ASCII file listing all of the SEGY files to merge, using the full path to the SEGY files:
There is no limitation to the number of files you can merge and the size is limited by the amount of free space you have on the device to output the merged SEGY file.
As a reminder, all of the SEGY files should be consistent on number of samples and sample interval.
License not found when using su (switch user)
Using "su" to switch a user within a logged in machine/session to launch the software, it will keep the user's home the same, depite the $USER export changing, which will not properly connect to the license. Try running "ssh (machine) -l (user)" instead and then launching the software.
Please ensure the license is in the license folder, the user has access to read the license and execute lmgrd and geotomo executables.
What does utility “Set Unique SHT/REC ID do”?
It scans the Shot and Reciever coordinate information in bytes 73-85 (4 byte integer) and creates unique IDs based on shots and receivers that fall in to the same bin (defined by the bin size specified by the user)
When running FD elastic model with a layer of deep water (sea) the program crashes with “fd2dte_master.exe has stopped working”When running FD elastic model with a layer of deep water, the program crashes. What you should check is the Vs of the model. The correct way to model the water Vs for the elastic FD is to use a value of 0.0. If you have a different value and the program crashes, please try this first.
Why does it take the launcher image so long to change when moving the mouse over different products?
This is a bug in JAVA, please edit the “GeoTomoSurfaceSeismic.sh” or “GeoTomoDownholeSeismic.sh” script and add “-Dsun.java2d.pmoffscreen=false” after the java command. We have noticed this may really only affect slow SSH connections and remote desktop sessions, such as VNC or NX.
Why does my job not start after clicking apply?
If you click apply and the black terminal window appears to deploy the job, but nothing shows up in the log window, please login to the nodes and disable the firewall and try again.
If you require a firewall, you can modify the runtime script by putting --mca oob_tcp_dynamic_ports 49990-50010 before "-np" on the mpirun or mpiexec line and making sure you open that range of ports in the firewall. Then retry the job from the modified script. If that works, then you can create a file in $HOME/.openmpi/mca-params.conf and add the following:
For larger jobs and clusters you may have to open up more ports, so if the job fails to start then you know you will need to make the modification to include more ports.
Published on 4-NOV-2017
MPI job hangs or isn’t running properly.
There can be a number of reasons why your job may not run correctly. After verifying the mounts and you’ve made sure there are no system problems, the next step to try is editing the runtime script generated (usually created in the data folder of the project and includes the word “_runScript”) and placing following text after “mpirun” but before “-np”:
--mca btl_base_verbose 30 –-mca plm_base_verbose 100
This will increase the verbosity of mpirun and include information that will assist in troubleshooting in the job’s log file. Please send the log file, screen shots, and any relative information to support when contacting us about the issue.
libg2c.so not found
This library is required to run some of the Fortran code in our software. You will need to search for the RPM if you use RHEL/CentOS/SuSE and install it (as root) with "rpm -i (rpmname).rpm".
For Debian/Ubuntu, please search online for the package "libg2c0_3.4.6-8ubuntu2_amd64.deb" and use the command "dpkg -i --force-all libg2c0_3.4.6-8ubuntu2_amd64.deb" to install it.
To find the RPM for your specific distribution, please visit http://rpm.pbone.net and search for "libg2c.so".
Version 10 and below of Ubuntu, you can find the package in the repository as "libf2c2" and install it with the command: "apt-get install libf2c2".
What does VECON do?
VECON provides a powerful model builder to quickly and easily create a 2D or 3D velocity model from a variety of input data types and sources. VECON then uses this model, along with the well trajectory, to help you design the optimum source-receiver geometry for your VSP survey by tracing rays, and model any imaging problem.
The 2D/3D finite-difference modeling in VECON graphically illustrates wavefield propagation through your model helping you understand many survey design or interpretation issues.
Is it difficult to install VECON?
There is no installation required for the Windows version. Simply copy the VECON folder from the software CD or extract it from the downloaded archive, and then you are ready to run the program. You must also obtain a license key from GeoTomo which is required to run the software. This small file can be sent via email and is placed in the VECON/license folder.
The Linux version is also quickly installed but is usually performed by your system administrator as some steps may require root privileges.
How do I obtain a VECON license key?
For Windows, we need to know the hostid of the computer you be using for VECON. Please download the Windows script from http://geotomo.com/scripts.html and run it. Please send back the text file that is generated.
Email the number returned to firstname.lastname@example.org and a license key will be generated and sent via email. Place the key file in the VECON/license folder. No other steps are required.
When I run VECON, I get the following error message: “java.lang.Exception: Failed to read the license key. License Failed!”.This message means that VECON has found a license key but it does not match your computer. Make sure you have not altered the key in any way. Also, adding or changing your computer hardware may require that you obtain a new key. If you suspect this is the problem, repeat the steps for obtaining a key to see if the hostid number has changed. If so, you will need to obtain a new license key from email@example.com.
What information do I need to build a 2D model in VECON?2D models can easily be built interactively in VECON. You can draw the 2D layers, faults and objects “freehand”. You can also load seismic data (SEGY) or a cross-section in gif or jpg format. By picking along the seismic data or image you quickly build the layers for your 2D model. You will also need P-wave velocities for the layers and objects in your model. VECON also allows you to specify layer densities, Vp/Vs ratio and velocity gradients, but these can be defaulted if you choose. You can also load 2D interface data from several other vendor packages. Check with firstname.lastname@example.org for additional details.
What information do I need to build a 3D model in VECON?
VECON 3D models can be built from intersecting 2D models. All the options listed above are available for constructing cross-sections used to build your 3D model. You can also import ASCII 3D interface maps from your interpretation system to either build a model directly or to aid in building cross-sections for the 3D model. Another way to construct 3D models is by digitizing contour maps directly in the 3D model builder. You will also need P-wave velocities for the layers and objects in your model. VECON also allows you to specify layer densities, Vp/Vs ratio and velocity gradients, but these can be defaulted if you choose.
You can also load 3D models from some other vendor packages. Check with email@example.com for additional details.
Can VECON generate synthetic traces for input to another software package?Synthetic traces can be generated by either the wavefront raytracer or the finite-difference modeling in VECON. The 2D raytracer generates 2-component synthetics and the 3D raytracer 3-component synthetics. 2D/3D acoustic finite-difference synthetics record the pressure response of the model. 2D/3D elastic finite-difference synthetics record the vector response of the model. 2D VTI/TTI/HTI anisotropic finite-difference synthetics are also available. All synthetics are written in standard SEGY format.
What information is contained in the VECON synthetic traces?In addition to the wavefield contained in the trace data, all geometry data and traveltimes of all the seismic phases is written to the standard SEGY trace headers.
Does VECON treat land and marine cases differently?When creating a new VECON model you must specify if it is Land or Marine. For land models the first layer in the model is assumed to be the surface topography. You can build the topography interactively or load it from an ASCII file. For marine models, sea level is automatically defined at depth zero. The first layer in the model is assumed to be the sea floor. A water velocity is automatically assigned but can be edited if necessary.
The acquisition geometry I need to model is “non-standard”. Can VECON handle this?VECON provides tools to define most standard VSP geometries, including reverse and normal-incidence surveys. Receivers are positioned at regular intervals in the borehole. Shots can be placed at regular intervals along or below the surface or a layer in your model. Editors are available to change individual shot or receiver coordinates if required for a “non-standard” survey.
What types of 3D acquisition geometry does VECON support?Templates in VECON make it easy to define rectangle, circle, spiral and single-well 3D VSP surveys. Editors are also available to change individual shot or receiver coordinates if required for other survey geometries.