Seismic 2D Reflection Processing and Interpretation of ... - Posiva

30Figure 25. Example of a weak reflector continuing from line S48 to line S50 to lineS362. It would be hard to locate the reflector from the single lines without the helpfrom the crossing lines.4.2 Three dimensional surfacesTwo-dimensional stacked sections were imported into OpendTect visualizationenvironment, where reflectors were picked. Sections were displayed using variabledensity display. In an intersection of two lines, reflectors may continue from line toline which allows three dimensional picking. Example of reflectors continuing fromline to line is shown in Figure 26. Reflectors picked from crossing lines, constructsurfaces. After all the relevant surfaces and reflectors were picked, they were mergedinto larger surfaces. Still some single two-dimensional reflectors remain.Example of a three-dimensional surface is shown in Figure 27. This surface consists ofreflectors picked from the lines 312, 432, 28, 29, 30, 31 and 43.Twelve surfaces and 23 single 2D reflectors in total were picked and are shown inAPPENDIX 1. 2D reflectors constructing surfaces are named according to the surfacename and single reflectors with a prefix ‘single’. Surfaces were mainly in focus butalso some single reflectors can be found interesting (see below). Normally the highamplitude reflectors are not continuous over the whole survey area, but display ratherbroken and some times discontinuous character. Also abundant diffracted energy (steep