METHOD OF PRE-STACK TWO-DIMENSION-LIKE TRANSFORMATION OF THREE-DIMENSIONAL SEISMIC RECORD

摘要

A method of pre-stack two-dimension-like transformation of three-dimensional seismic record is accomplished by the following steps: acquiring 3D seismic data, and arranging them according to a shot gather; calculating the offsets of all the wave detection points from the first detection line of the first shot; making a straight line((L2')which connects the shot point (S) and the wave detection point (R1) of the smallest offset as the transformed coordinate axis, and making the shot point (S) as the center, drawing circles whose radii are the offsets (offseti) of each wave detection point, then rotating each wave detection point to the straight line (L2'), thereby accomplishing the two-dimension-like transformation of all the detection lines of the shot, and getting three-dimensional seismic data graph with high precision; and then making the processing of the noise elimination and static correction on the three-dimensional seismic record using conventional technique.