Seismic attribute analysis typically starts with a rock property analysis. Normally, a rock property study begins with an analysis of the rock properties measured by well logs. Through rock property analysis and forward modeling, key seismic attributes can be identified and their ability to distinguish important reservoir or lithology characteristics determined. Generally, time-based attributes relate to structure, amplitude-based attributes to stratigraphy or hydrocarbons, and the frequency-based attributes to stratigraphy or reservoir characterization. Multicomponent seismic attributes can detect fractures and faulting and determine their orientation. Attenuation attributes can help in gas reservoir detection. If enough wells are present, key reservoir attributes can be used in an existing field to optimize production drilling.
The ION Difference
In addition to attributes analysis, we routinely apply a proprietary gather preparation and pre-conditioning process to the seismic data to attenuate surviving multiples, improve signal-to-noise, obtain precise gather flattening, and restore the trace amplitude balance. This provides the best possible input for generating pre-stack inversion and AVO attributes, which enables the most accurate correlation to reservoir rock properties.
We use azimuthally-varying P-wave attributes and/or converted shear-wave splitting attributes, combined with well core and log analysis information, to identify areas with favorable fracture densities along with orientations. This procedure improves drilling success and optimizes production in fracture-dependent unconventional reservoirs.