초록 ▼

A semblance attribute to more reliably detect a seismic discontinuity is provided. The semblance attribute of the center point of a seismic volume is calculated from 3D traces within a spatial and time window. The seismic attribute is dependent, at least in part, on the ratio of the square of the su

A semblance attribute to more reliably detect a seismic discontinuity is provided. The semblance attribute of the center point of a seismic volume is calculated from 3D traces within a spatial and time window. The seismic attribute is dependent, at least in part, on the ratio of the square of the sum of the amplitudes of said traces within the window and the sum of the squared amplitudes of said seismic traces over within the window.

대표청구항 ▼

[ What is claimed is:] [1.] A method of locating a subsurface geologic structure indicating a recoverable natural resource in an underground volume, said method comprising:obtaining 3D seismic data traversing at least a portion of said underground volume;calculating a semblance attribute within a wi

[ What is claimed is:] [1.] A method of locating a subsurface geologic structure indicating a recoverable natural resource in an underground volume, said method comprising:obtaining 3D seismic data traversing at least a portion of said underground volume;calculating a semblance attribute within a windowed portion of said 3D seismic data wherein said semblance attribute calculation is dependent at least in part on windowed seismic samples displaced in an in-line spatial direction, windowed seismic samples displaced in a cross-line spatial direction, the number of said in-line seismic samples, and the number of said cross-line seismic samples;displaying a representation of said structure, wherein said representation is dependent at least in part on said semblance attribute; anddrilling a well capable of recovering at least a portion of said natural resource.