Abstract: Use of Color Displays in Seismic Interpretation

W. F. Albers

Auxiliary measures of seismic data, such as interval velocity, reflection strength, phase, and frequency content, are important aids to an interpreter. These measurements can be used to resolve problems of correlation across zones of broken continuity, for lithologic identification, and as a means of determining reflection anomalies which may be indicative of hydrocarbon accumulations.

The problem which the interpreter faces is one of appreciating these many variables and seeing their interrelations. The optimum display of auxiliary variables is in the form of a color modulation superimposed on a normal black and white reflection section.

The quantitative use of color in the display of seismic data brings to an interpreter's attention variations in geology which are not otherwise evident. For instance, a velocity inversion stands out when the velocities are displayed in color. Frequency and amplitude anomalies also are more evident. The use of calibrated color aids the interpreter in his checks for areal consistency and for locally significant variations.

With well-processed data which are relatively free of recording variations, changes in reflectivity indicate changes in the geology. The Seischrome process permits the interpreter to focus on the exact points where changes occur and to determine the magnitude of the changes.

AAPG Search and Discovery Article #90972©1976 AAPG-SEPM Annual Convention and Exhibition, New Orleans, LA