Seismic data processing is an art and a science. The open source software Seismic Unix has modules for over 20 migration routines, other packages do so as well. Before we get to choosing the best migration routine, there are a couple things anyone handling seismic data should remember. These are 7 Tips from my experience: […]
Tag Archives: seismic
The subjective science of seismic interpretation
The final step in the work with seismic data is seismic interpretation. In a scientific field called geophysics, interpretation sounds highly subjective; Very different from the usual statistics, ray and wave phenomenae. This can’t be right, right? I’d love to say it’s very clear and seismic data reveals a perfect image of the subsurface. But […]
Promax 2D Multiple Reduction
I am at a point, I could use some help with the program Promax 2D from Landmark Corp. I have posted in a LinkedIn group and this way I hope I may get some signal boost for my question. Do you have some experience with the following? Help a fellow Masters student out? I am […]
Do you know your seismic velocity?
In seismic data analysis a lot of work goes towards getting a good velocity model of the subsurface. We talk about the seismic velocity. However, this may lead to some serious misconceptions. One step in seismic processing is velocity analysis. We pick the velocity that adjusts our data for the best value. Usually this is […]
Under Pressure – Multi-component seismic acquisition
Imaging the subsurface has become more and more complex. If we want to get a state-of-the-art image we might consider a slanted multi-component streamer acquisition and process it with a full waveform inversion to finish it off with a nice pre-stack Gaussian beam migration. Yeah… Even as a geophysics master student this is some tough […]
Recording a seismic wave – What’s new?
Streamers are an essential part in the marine seismic experiment. When I first came into geophysics, I learned that streamers are fluid-filled hoses with pressure probes. This might be right in the case of our streamer at the university which isn’t quite up to par with the newest developments out in the industry. Oil-filled seismic […]
Know your scale – Why wavelengths are so important
So you thought there is just one “seismics”? In general, we might say that the seismics experiment is watching mechanical waves travel through Earth and then apply science on it to get an image of the Earth’s interior. However, this experiment and the science behind it has a high degree of uncertainty. When we conduct […]
Seismics Introduction
We send sound into the ground and listen what comes back to the surface. There are a lot of sources we can use to make this sound. A very basic but effective approach is to use a sledgehammer and bang it on a steel cap on the ground. This works well to get some acoustic […]