Changes

* Refraction

* Refraction

'''2-D reflection seismic data''' provide cross-sectional views in both the dip and strike directions. Data on the lines are a mixture of both in-plane and out-of-plane reflectors. 2-D reflection seismic data are most important in the earlier stages of an exploration program, especially in frontier basins.

'''2-D reflection seismic data''' provide cross-sectional views in both the [[dip]] and strike directions. Data on the lines are a mixture of both in-plane and out-of-plane reflectors. 2-D reflection seismic data are most important in the earlier stages of an exploration program, especially in frontier basins.

'''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.