Computer Modelling Group

Computer Modelling Group Ltd., commonly known as CMG, is a Calgary-based software company serving the petroleum-reservoir engineering and subsurface modelling market. Its principal business is the development and commercialization of simulation software used to represent fluid flow through reservoirs, evaluate recovery strategies, and support technical decisions across the life of an oil and gas asset. The company’s tools are intended for specialist users such as reservoir engineers, production engineers, geoscientists, and energy companies assessing field-development alternatives. CMG originated in 1978 through work led by Khalid Aziz in the University of Calgary’s Chemical Engineering department. The initial simulator-development effort was supported by a research grant from the Alberta government. During its early history, the organization operated as a non-profit entity for 19 years. Its technical reputation developed particularly around heavy-oil modelling, an area in which accurately representing complex fluid behavior, thermal processes, and difficult recovery conditions is important. CMG subsequently broadened its modelling expertise to cover conventional reservoirs, enhanced and improved oil recovery, compositional systems, unconventional resources, and other advanced reservoir-flow applications. The company had a commercial product by the late 1980s and became a publicly traded company in 1997 through a listing on the Toronto Stock Exchange under the symbol CMG. Its core product family comprises IMEX, GEM, and STARS. IMEX is a conventional black-oil simulator for primary, secondary, and enhanced or improved oil-recovery studies. GEM is an equation-of-state compositional simulator designed for more complex fluid systems and unconventional-resource modelling. STARS is a thermal and advanced-processes simulator that uses k-value approaches to support studies involving thermal recovery and other specialized processes. CMG also offers CMOST, a reservoir-engineering tool for automating history matching, sensitivity analysis, and optimization of reservoir models. This type of automation helps users test multiple model parameters and compare possible interpretations or development strategies. CoFlow extends the company’s scope into production engineering by supporting wellbore and facility analysis and enabling coupling with reservoir models. Together, these products position CMG as a technical software provider whose value proposition is based on simulation capability, workflow integration, and specialized knowledge of complex reservoir behavior. The company is headquartered in Calgary and has branch offices in Houston, Dubai, Bogotá, Rio de Janeiro, London, and Kuala Lumpur. The international office network reflects its focus on global energy-producing regions and on customers operating reservoirs with differing geological, fluid, and production characteristics. CMG has stated that it serves more than 570 clients in 58 countries, although the cited reference does not provide a date for that customer figure. In 2018, president and chief executive officer Kenneth Dedeluk announced his retirement, and Ryan Schneider was appointed as his successor. In 2025, CMG announced an agreement to acquire SeisWare International, a Calgary- and Houston-based geoscience software company, for an estimated purchase price of US$6.6 million before customary closing adjustments. The transaction was presented as an expansion of CMG’s seismic-solutions activities and was accompanied by leadership changes involving Bluware and SeisWare. CMG remains an active, publicly listed specialist software company focused on subsurface and production technologies for the energy sector.

Computer Modelling Group began in 1978 as a simulator-development initiative associated with Khalid Aziz in the University of Calgary’s Chemical Engineering department. The work received financial support through a research grant from the Alberta government. The project addressed the need for increasingly sophisticated computational tools to represent reservoir behavior and evaluate petroleum-recovery methods. CMG’s early technical development helped establish a foundation for later commercial software used by reservoir engineers and energy companies. For its first 19 years, the organization operated as a non-profit entity. Its expertise became especially associated with heavy-oil simulation, where thermal effects, viscous fluids, complex phase behavior, and specialized recovery methods can make conventional modelling approaches insufficient. Over time, CMG expanded beyond heavy oil into broader reservoir-flow and advanced-processes modelling. The company had a commercial product available by the late 1980s, marking its transition from a research-oriented initiative into a software business serving industry users. CMG became a public company in 1997 when it was listed on the Toronto Stock Exchange under the ticker CMG. Its commercial portfolio developed around three principal reservoir simulators. IMEX addressed conventional black-oil simulation for primary, secondary, and enhanced or improved recovery studies. GEM provided equation-of-state compositional and unconventional simulation capabilities for reservoirs and fluids requiring more detailed representations. STARS focused on thermal and advanced processes, including applications in which thermal recovery and specialized process modelling are central. The company later broadened its product ecosystem with CMOST, a reservoir-engineering application for automated history matching, sensitivity analysis, and model optimization. This supported more systematic evaluation of reservoir uncertainty and development options. CMG also developed CoFlow for production engineering, including wellbore and facility analysis and smart coupling between production models and reservoir models. The combination of simulation, optimization, and production workflows became a defining part of CMG’s specialist software position. CMG operates from Calgary and maintains branch offices in Houston, Dubai, Bogotá, Rio de Janeiro, London, and Kuala Lumpur. Its geographic presence corresponds to the international nature of the oil and gas industry and provides access to customers in several major energy markets. The company has reported more than 570 clients across 58 countries, though the available reference does not date that figure. In 2018, President and CEO Kenneth Dedeluk announced his retirement, and Ryan Schneider was appointed to succeed him. A later strategic development came on 31 July 2025, when CMG announced the planned acquisition of SeisWare International, a geoscience software company with more than 40 employees in Calgary and Houston according to the cited material. The estimated purchase price was US$6.6 million, subject to customary closing adjustments. The transaction was intended to integrate SeisWare into CMG’s seismic-solutions division and broaden the company’s activities beyond its established reservoir-simulation base. The 2025 transaction also produced organizational changes. Herman Nieuwoudt, who had become president of Bluware in November 2024, was elevated to Executive Vice President and President of Seismic Solutions. Murray Brack, SeisWare’s chief executive, was expected to continue with CMG as SeisWare’s general manager, reporting to Nieuwoudt. At the annual general meeting on 4 September 2025, Anuroop Duggal and Andrew Pastor were elected to the board, with Pastor later designated chair. CMG therefore entered its current period as an active, publicly listed energy-software company combining established reservoir-simulation products with an expanding seismic-solutions direction.

• 2025

  SeisWare acquisition announced

  [1]Computer Modelling Groupen.wikipedia.org

  CMG announced an agreement to acquire SeisWare International for an estimated US$6.6 million, subject to customary closing adjustments.

• 2025

  Board changes announced

  [1]Computer Modelling Groupen.wikipedia.org

  Anuroop Duggal and Andrew Pastor were elected to the board at the 4 September annual general meeting; Pastor was later designated chair.

• 2018

  Chief executive succession

  [1]Computer Modelling Groupen.wikipedia.org

  Ryan Schneider was appointed president and chief executive officer after Kenneth Dedeluk announced his retirement.

• 1997

  Listed on the Toronto Stock Exchange

  [1]Computer Modelling Groupen.wikipedia.org

  CMG became a public company and began trading on the Toronto Stock Exchange under the symbol CMG.

• 1988

  Commercial product became available

  [1]Computer Modelling Groupen.wikipedia.org

  CMG had brought a commercial software product to market by the late 1980s.

• 1978

  Simulator-development initiative established

  [1]Computer Modelling Groupen.wikipedia.org

  Khalid Aziz began work on a reservoir simulator through the University of Calgary’s Chemical Engineering department with support from an Alberta government research grant.

A specialist energy-software provider focused on reservoir simulation, advanced recovery-process modelling, automated reservoir-engineering workflows, production analysis, and related subsurface technologies.

• Conventional black-oil reservoir simulator

  IMEX

  IMEX is CMG’s conventional black-oil simulation application. It is used to model primary and secondary production as well as enhanced or improved oil-recovery processes. The product is intended for reservoir-engineering studies in which black-oil representations are appropriate for evaluating fluid movement, pressure behavior, field performance, and development alternatives.

• Compositional and unconventional reservoir simulator

  GEM

  GEM is CMG’s advanced equation-of-state compositional simulator. It supports modelling of complex fluid systems and unconventional-resource applications where a more detailed treatment of phase behavior and composition is required. Its role is to help engineers analyze reservoir performance and recovery strategies that cannot be adequately represented by simpler black-oil approaches.

• Thermal and advanced-processes simulator

  STARS

  STARS is CMG’s k-value thermal and advanced-processes simulation application. It is associated with studies involving thermal recovery and other specialized reservoir processes. The simulator is particularly relevant where heat transfer, temperature-dependent fluid behavior, or nonstandard recovery mechanisms must be represented in a reservoir model.

• Reservoir-engineering workflow and optimization tool

  CMOST

  CMOST automates several reservoir-engineering workflows, including history matching, sensitivity analysis, and optimization of reservoir models. By coordinating repeated simulation runs and parameter studies, it helps users investigate uncertainty, compare model behavior, and identify combinations of assumptions or operating conditions that best fit available data or project objectives.

• Production-engineering software

  CoFlow

  CoFlow is CMG’s production-engineering software for wellbore and facility analysis. It can be coupled with reservoir models, allowing users to connect subsurface simulation with production-system analysis. This supports a more integrated view of how reservoir behavior, well performance, and surface or facility constraints interact.

• 2025

  Acquire SeisWare InternationalM&A

  Background

  CMG sought to broaden its software activities from reservoir simulation and production engineering into geoscience and seismic solutions.

  Action taken

  On 31 July 2025, CMG announced the acquisition of SeisWare International for an estimated purchase price of US$6.6 million, subject to customary closing adjustments. SeisWare’s workforce was to be integrated into CMG’s seismic-solutions division.

  Aftermath

  The announced integration was accompanied by the appointment of Herman Nieuwoudt as Executive Vice President and President of Seismic Solutions and the planned transition of Murray Brack to general manager of SeisWare.

  Estimated purchase price. US$6.6 million (Announced 31 July 2025; subject to customary closing adjustments)

  Source

1. 1Computer Modelling Groupen.wikipedia.org