Seismic Lithology & Facies Classification

lithology bannerClassifying lithologies and facies is important to distinctly define rocks of interest and to build a better understanding of the depositional environments encountered in the wellbore. 

Typical reservoir properties considered for lithology prediction are mineral composition, especially volume of sand and clay, porosity, fluid saturations and texture characteristics.

well log

Defining Seismic Facies with Petrophysics and Rock Physics

Petrophysical facies classification for seismic reservoir characterization workflows integrates log data with core or cuttings data and production data to define facies properties.  Rock physics modeling establishes the elastic relationships between those rock properties and the seismic response. 

Predicting Facies Distribution

With those relationships established, an integrated seismic inversion and classification workflow utilizing multi-dimensional probability density functions (PDFs) for each possible facies and a supervised Bayesian classification scheme generates probability cubes for the distribution of the different facies that have been defined with lithology and fluid properties. This methodology, grounded with real-world petrophysical measurements, quantifies uncertainty in seismic lithology and facies prediction while providing a superior definition of the lithology classes. 
The predicted facies and fluid volumes are the foundation for advanced earth modeling.

facies probabilityProbability volume for a"low density shale" facies class from an onshore US unconventional play. Red indicates 100% probability, light blue indicates 0%.

 

Industry Articles

INDUSTRY ARTICLES

Explore CGG's impressive library of journal and magazine articles.

Geostatistical Inversion Guides Development I...

HaiHong Wang | Kevin Chesser | Jeff Zawila | Samuel Fluckige...
©2016 The American Oil & Gas Reporter

Accounting for bias and uncertainty in facies...

John Pendrel | Henk Schouten | Raphael Bornard
©2016 SEG
GeoConsulting - (new) Petrophysics

Petrophysics & Rock Physics

Our Petrophysical workflows and Rock Physics modeling integrate log, core/cuttings and production data to obtain meaningful physical properties

GeoConsulting - (new) Seismic Reservoir Characterization

Seismic Reservoir Characterization

Seismic inversion workflows customized for your reservoir characterization goals and backed by global expertise in clastic, carbonate and unconventional reservoirs

GeoSoftware - Advanced Geostatistical Inversion

Advanced Geostatistical Inversion

Integrate disparate data and interpretations across all pertinent geoscience domains into highly detailed and predictive sub-surface reservoir characterizations.
GeoConsulting - Geophysical Services (SRC)

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