2010•Unpublished venueRequires access
Using semblance based coherency to detect micro faults in the Khangiran gas field
Hashemi Gazar
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Abstract
Seismic attributes are very useful in seismic data interpretation. One of these attributes is the coherency attribute. Seismic coherency is a complex trace and a geometrical attribute that is applied to a 3D cube of seismic data. It is a measure of lateral changes in acoustic impedance caused by the variation in structure, stratigraphy, lithology, porosity, and the presence of hydrocarbons. When coherency attributes are applied to seismic data, they show the continuity between two or more traces of the seismic window. The rate of the seismic continuity is a sign of geological continuity. The 3D seismic coherency cube can be extremely effective in delineating faults. To calculate the attribute of coherency, there are three solutions: semblance, eigenstructure and cross correlation. Inputs of these