Search results
Results from the WOW.Com Content Network
Reflection seismology, more commonly referred to as "seismic reflection" or abbreviated to "seismic" within the hydrocarbon industry, is used by petroleum geologists and geophysicists to map and interpret potential petroleum reservoirs. The size and scale of seismic surveys has increased alongside the significant increases in computer power ...
In comparison to the typical seismic reflection survey, which is restricted to relatively small incidence angles due to the limited offsets between source and receiver, wide-angle reflection and refraction (WARR) data are acquired with long offsets, allowing the recording of both refracted and wide-angle reflection arrivals. [1] [2]
Seismic reflection is a sound wave bounced back from subsurface at the interface between media with different acoustic properties (density and wave velocity). [3] In geology, the reflections normally occur at the contacts between different rocks, for example, between layers of sedimentary rocks (stratification).
A seismic source is a device that generates controlled seismic energy used to perform both reflection and refraction seismic surveys. A seismic source can be simple, such as dynamite , or it can use more sophisticated technology, such as a specialized air gun.
Upper figure: a seismic profile showing intensity vs round-trip travel time. Lower figure: an interpretation of the results. Seismology makes use of the ability of vibrations to travel through rock as seismic waves. These waves come in two types: pressure waves and shear waves . P-waves travel faster than S-waves, and both have trajectories ...
In reflection seismology, a seismic attribute is a quantity extracted or derived from seismic data that can be analysed in order to enhance information that might be more subtle in a traditional seismic image, leading to a better geological or geophysical interpretation of the data. [1]
Seismic refraction is exploited in engineering geology, geotechnical engineering and exploration geophysics. Seismic refraction traverses (seismic lines) are performed using an array of seismographs or geophones and an energy source. The methods depend on the fact that seismic waves have differing velocities in different types of soil or rock.
Modern seismic reflection surveys are designed and acquired in such a way that the same point on the subsurface is sampled multiple times, with each sample having a different source and receiver location. The seismic data is then carefully processed to preserve seismic amplitudes and accurately determine the spatial coordinates of each sample.