Independent subsurface consultancy · Calgary, Canada
GeoMata works with geoscience and reservoir engineering teams to build and update static models, evaluate uncertainty and support field development. The work is led by Tim McCullagh, M.Sc., with more than 20 years of international subsurface experience.
Purpose
GeoMata builds on existing interpretations, combining geological understanding with fit-for-purpose modeling workflows. Documented assumptions, uncertainty analysis and collaboration with reservoir engineers help teams use the models for resource evaluation, simulation and development planning.
Capabilities
Core service
Fit-for-purpose static models that integrate structure, stratigraphy, facies, petrophysics, saturation and volumetric uncertainty.
Independent review of existing models and workflows, covering geological consistency, input assumptions, uncertainty and recommendations for further work.
Integration of seismic interpretation, geological mapping, well data, petrophysics and reservoir engineering feedback to support resource evaluation and development planning.
Seismic interpretation, AVO integration, prospect maturation, volumetrics and uncertainty analysis for exploration, well planning and farm-out studies.
Integration of seismic inversion, geostatistics and machine-learning volumes, with quality checks and comparison against well data and conventional modeling methods.
Representative experience
Tim McCullagh's experience includes reservoir characterization, resource evaluation and multidisciplinary studies across Canada, Colombia and Southeast Asia.
Built and updated multi-field static models using well, seismic and petrophysical data, with inversion and machine-learning inputs in recent work. Evaluated uncertainty and selected representative models for volumetric assessment and reservoir simulation.
Integrated 2D and 3D seismic interpretation, AVO evidence, regional geology and volumetrics to mature prospects and support drilling, portfolio, partner and farm-out decisions.
Modeled clastic and carbonate reservoirs in structurally complex, fractured and mature-field settings, integrating seismic, core, logs and petrophysics for resource and field-development work.
GeoMata BAR Framework™
BAM, AIM and RAM are diagnostic entry points selected to suit the project objectives, available evidence and required level of detail. Each can be used independently or combined as the study develops.
Baseline Assessment
Review the available data, existing interpretations, model assumptions and key uncertainties to establish the scope of further work.
Advanced Insight
Use data integration, scenario modeling and uncertainty analysis where additional detail would support the study objectives.
Rapid Assessment
Address a specific question through a targeted review or fit-for-purpose model within an agreed scope and timeframe.
Flexible entry points. The scope is agreed with the client team; there is no requirement to complete all three assessments or follow a fixed sequence.
How GeoMata engages
BAR guides the technical scope. Build, Assure and Integrate describe how GeoMata contributes to the client team.
Build
Assure
Integrate
Working method
GeoMata agrees the objectives and comparison criteria with the client team, then develops the model through input review, testing and engineering feedback.
Agree the study objectives, key uncertainties, available evidence and evaluation criteria.
Develop a fit-for-purpose model that reflects the geological interpretation and study requirements.
Compare model results with well data, volumetrics, dynamic behaviour and alternative interpretations.
Deliver the model with documented assumptions, limitations and quality checks, and support its use in subsequent studies.
Model delivery
About GeoMata
Tim McCullagh, M.Sc. — Principal Geoscientist & Geomodeling Advisor
Tim has more than 20 years of oil and gas experience across Canada, Colombia and Southeast Asia, including ten years based in Jakarta. His work spans clastic and carbonate reservoirs, frontier exploration, structurally complex fields and mature producing assets.
GeoMata combines seismic interpretation, geological mapping, well data and reservoir modeling to evaluate resources, identify drilling opportunities and support field development. The approach is collaborative, building on existing interpretations and applying fit-for-purpose Petrel workflows with clear documentation and communication.
Start a conversation
For enquiries about reservoir modeling, model review or exploration studies, contact Tim to discuss your objectives and where GeoMata could contribute.
Contact GeoMatatim@geomata.ca
