A seismic characterization of a non conventional reservoir using geometric and geomechanical attributes
Joaquín Cardoso, Eduardo Trinchero and Luis Vernengo
Event name: V Simpósio Brasileiro de Geofísica
Session: Geofísica da exploraçăo de hidrocarbonetos
Publication date: 27 November 2012
Info: Extended abstract, PDF ( 432.04Kb )
In the event that geoscientists are challenged to seismically characterize some reservoirs, in which their uniformity makes it difficult to identify the seismic facies and, especially, when conventional seismic attributes clearly do not solve the problem, geometric attributes provide a new perspective from a different viewpoint. This often gives greater geological sense to the seismostratigraphic interpretation of these reservoirs since new features can be identified in relation to both the structural architecture and the stratigraphic aspects of the characterization. Classic attributes provide a satisfactory solution, especially in the seismic characterization of conventional reservoirs such as sandstones, but this is not so evident in shales, tight sands or in presence of more compact and uniform reservoirs, which, however, are currently incorporating an amount of reserves that was unthinkable a few decades ago and whose development seemed almost impossible. This paper describes the application of geometric and geomechanical attributes and its interrelation, in an area covered with 3D seismic and characterized by the existence of important geological sequences traditionally classified as source rock. The steps followed included the proper condition of seismic data and a coherent and systematic working methodology that contributed to the seismic-geometric characterization of the potential reservoirs and displayed a more encouraging outlook for the discovery of commercially exploitable hydrocarbons and for the development of these unconventional reservoirs.