Seismic measurements

Seismic measurements can be used to gain knowledge about geological structures in the ground. The oil industry uses seismic measurements to locate oil-and gas reservoirs. This method works by sending a pressure wave into the ground, which gets reflected back when it meets a geological boundary. An example of a geological boundary is a boundary between sand and rock layers. This wave is then reflected back to the surface after a few seconds. The time that it takes for the wave to return to the surface tells us how far down the geological boundary is located. By the help of special computer programs, we can make three-dimensional maps of the subsurface. In our survey we used dynamite to produce pressure waves, which is normal when you work on shore.