Basic Safety Offshore
description: SEISMIc SURvEy this method is based on the natural phenomena of sound waves travelling at various distances after reflections on earth-layers. the sound waves are created by means of air guns and will be reflected back to the surface by the boundaries between different layers. Differences in density cause differences in the reflection patterns. hydro phones linked to computers scan an area and the collected data is translated into a drawing. geological specialists can then identify “Fields of promise”. After a promising survey a drilling unit may drill one or more appraisal (tests) wells. Appraisal (test) drilling will prove the potential of the field and determine if the field is economically
publisher: falck nutec
format: pdf