Our online courses have been available since 2001. This original material for download was prepared while the authors worked at Amerada Hess London who have authorised release of the material dated September 2001 for non-profit making purposes only. The opinions reflected within are those of the authors not necessarily those of the Hess Corporation. It was the intention to release version 2 of the course in 2002, with revised basic material, corrected typographical and link errors and enlarged theory, migration and survey planning sections. These updates are now available from Tonnta Energy Limited.