Geomodeling/Static Modeling Consulting
Integrating Geology, Petrophysics, and Geophysics into a Representative 3-D Static Model
Assign your company's geomodeling/static modeling challenges to A&A, and let the high-level, seasoned geological, petrophysical, and geophysical/seismic-interpretation consultants of the A&A Consulting Team build the representative 3-D static model your reservoir simulation, reserves, and development decisions can stand on.
Avasthi & Associates, Inc. (A&A) is an independent petroleum engineering and geosciences consulting firm. A&A does not sell geomodeling/static-modeling software — our only business is expert technical consulting, which means our geomodeling recommendations are never influenced by a stake in any particular software vendor or technology.
The high-level and seasoned geological, petrophysical, and geophysical/seismic-interpretation consultants of the A&A Consulting Team are experienced in all aspects of developing representative geomodels/static models, using state-of-the-art geomodeling/static-modeling software, such as Petrel.
What Is Geomodeling/Static Modeling?
A geomodel — also called a static model, or geocellular model — is a three-dimensional digital representation of a reservoir's structure, stratigraphy, facies, and petrophysical properties (porosity, permeability, and fluid saturation), built by integrating geological, petrophysical, and geophysical/seismic-interpretation data into a single, internally consistent framework.
Unlike a dynamic reservoir-simulation model, a static model does not simulate fluid flow over time. Instead, it provides the geological foundation — the 3-D grid of rock and fluid properties — that a dynamic reservoir-simulation model is built from (through upscaling), and that is used directly for calculating original oil- and gas-in-place volumes and probabilistic reserves estimates.
A&A's Geomodeling/Static-Modeling Process
The high-level, seasoned consultants of the A&A Consulting Team follow a rigorous, industry-standard workflow to build representative static models, including, but not limited to:
• Structural framework: building the horizon and fault framework from geophysical/seismic interpretation, tied to well tops and marker data
• Facies and stratigraphic modeling: populating the 3-D grid with rock types, honoring the depositional environment and sequence-stratigraphic framework
• Petrophysical property modeling: populating porosity, permeability, and water saturation throughout the 3-D grid, using geostatistical methods (variogram analysis, kriging, and sequential Gaussian/indicator simulation) constrained by log and core data
• Upscaling and QC: upscaling well-log properties to the geocellular grid, and validating the model against the original well data
• Volumetrics: generating probabilistic (P10/P50/P90) oil- and gas-in-place volumes, and preparing an upscaled model suitable for dynamic reservoir simulation
The Disciplines Behind the Model
A representative static model draws on three A&A geosciences disciplines, each contributing a distinct layer of the model:
Geological Consulting
Our geological consultants integrate structural, stratigraphic, and depositional information into the model's structural framework and facies model — defining the geometry, well-to-well correlation, and rock-type distribution the static model is built around.
Petrophysical Consulting
Our petrophysical consultants supply and validate the porosity, permeability, water-saturation, and lithology values — derived from well-log and core analysis, using software such as Interactive Petrophysics (IP) and PowerLog — that constrain the model's petrophysical property distributions.
Geophysical/Seismic Interpretation Consulting
Our geophysical/seismic-interpretation consultants build the horizon and fault interpretation that defines the model's structural framework, and use seismic attributes and inversion to help constrain the facies model between wells.
Related A&A Service: For a full description of A&A's geological, petrophysical, geophysical/seismic, geostatistical, and geochemical analysis services — independent of geomodeling — please see our Geosciences Consulting
What A&A Delivers
A geomodeling/static-modeling consulting engagement with the A&A Consulting Team is built around the practical decisions your company needs to make, including, but not limited to:
• A representative 3-D static model, integrating structural, facies, and petrophysical property data
• Identification and quantification of key geological and geophysical risks and uncertainties in the model
• Probabilistic (P10/P50/P90) oil- and gas-in-place volumes
• An upscaled model, ready for dynamic reservoir simulation
• Presentation-ready results, and mentoring/training for your company's technical staff
Related A&A Services
A representative static model is often the starting point for several other A&A consulting services, including, but not limited to:
• Reservoir Characterization Consulting: reservoir simulation, integrated asset modeling, IOR/EOR, reserves determination, and economic and risk analysis, built on the static model
• Probabilistic Approach to Reservoir Performance Predictions: fully probabilistic reservoir performance forecasts, using the Top-Down Modeling (TDM) tool or the Design of Experiments (DoE) method
• Geomechanics Consulting: in-situ stress analysis, fracturing-stimulation design, and wellbore-stability studies, which draw on the same structural and petrophysical framework
To put the high-level, seasoned geological, petrophysical, and geophysical/seismic-interpretation consultants of the A&A Consulting Team to work on your company's challenging geomodeling/static-modeling, reservoir characterization, probabilistic reservoir performance predictions, and other geosciences-related projects — as well as geomechanics projects — please contact us (Contact@AvasthiConsulting.com) or click here.
