Changes

'''3-D reflection seismic data''' provide resolved cross-sectional views along any azimuth within the survey area. Time “slices” (maps) on any horizon can also be generated. The nature and location of out-of-plane features can be more accurately determined. Because of the high acquisition costs, 3-D seismic techniques normally are used only to more accurately define individual prospects.

'''3-D reflection seismic data''' provide resolved cross-sectional views along any azimuth within the survey area. Time “slices” (maps) on any horizon can also be generated. The nature and location of out-of-plane features can be more accurately determined. Because of the high acquisition costs, 3-D seismic techniques normally are used only to more accurately define individual prospects.

'''Shear wave data''', in combination with conventional compressional wave data, can provide information on lithology, fractures, and the presence of hydrocarbons.

'''Shear wave data''', in combination with conventional compressional wave data, can provide information on lithology, [[fracture]]s, and the presence of hydrocarbons.

'''Refraction seismic data''' provide a deep crustal view of gross structure (basin scale to lithosphere-upper mantle scale), which is useful when trying to understand regional tectonics.

'''Refraction seismic data''' provide a deep crustal view of gross structure (basin scale to lithosphere-upper mantle scale), which is useful when trying to understand regional tectonics.