Seismic facies

Classical seismic facies approach is an exceedingly useful technique for better understanding of the geological development of the study area. Seismic facies is a descriptive analysis of the reflection patterns, such as sequence shape, reflection configuration, overall amplitude, frequency and continuity. Amplitude and frequency are used effectively to evaluate seismic attributes.

Standard attributes:

• Sequence shape
• Reflection pattern
• Reflection continuity
• Average amplitude
• Average frequency content
• Direct Hydrocarbon Indicators (DHI)

Possible Interpretation Results:

• Depositional systems
• Direction of deposition
• Potential Reservoir rock
• Potential Source rock
• Seal potential

Using the facies patterns and the seismic data reflections along with dip meter data, if available, direction of deposition can be interpreted along with depositional facies.

Such interpretation is critical not for fluvial environments only (see figures), but for other types of depositions as well – both clastic and carbonate.

Once the depositional facies is interpreted then migration paths and possible trapped hydrocarbons can be evaluated.

Cluster analysis of seismic facies is a part of dynamic interpretation of seismic data used for studying the deposition settings within the specific intervals and for lithofacies prediction from seismic data. The procedure is performed using the Stratimagic package utilizing the technology of neural networks NNT (SISMAGETM Neural Network Technology).

This technology can be used both on 3D and 2D seismic data.