Seismic window: where is the seismic line?

摘要

Recently our data manager spent several months cleaning up a large seismic database that had numerous misties at line intersections. The misties were the result of incorrect positional data associated with the seismic lines and some protracted detective work was needed by him to correct the errors. This article describes some causes of the errors and is illustrated with sketches from his notes. The project database covers an area of the offshore Browse Basin and was populated with data from several sources: processing contractors, joint venture operators, study groups, acreage gazettal data packs, purchases, 'the Internet' and government agencies. It was found that where multiple versions of a seismic line were present they rarely plotted in the same place on a map (Figure 1).