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.

* Interpretation on each line should proceed from well-imaged, well-constrained portions of the line toward areas of poorer constraint. Use symbols for varying quality of interpretation.

* Interpretation on each line should proceed from well-imaged, well-constrained portions of the line toward areas of poorer constraint. Use symbols for varying quality of interpretation.

* Map multiple horizons.

* Map multiple horizons.

* Map and contour fault surfaces critical to closure.

* Map and [[contour]] fault surfaces critical to closure.

* Integrate fault and horizon contours.

* Integrate fault and horizon contours.

* In thrust, rift, and extensional terranes, emphasize dip line interpretation; in foreland and [http://www.glossary.oilfield.slb.com/en/Terms.aspx?LookIn=term%20name&filter=wrench%20fault wrench] terranes, equally emphasize strike line interpretation.

* In thrust, rift, and extensional terranes, emphasize dip line interpretation; in foreland and [http://www.glossary.oilfield.slb.com/en/Terms.aspx?LookIn=term%20name&filter=wrench%20fault wrench] terranes, equally emphasize strike line interpretation.

[[Category:Predicting the occurrence of oil and gas traps]]  

[[Category:Predicting the occurrence of oil and gas traps]]  

[[Category:Exploring for structural traps]]

[[Category:Exploring for structural traps]]