Black Oil &
Unconventional Simulator

IMEX models primary and secondary oil recovery processes in conventional and unconventional reservoirs.

The Importance of Speed in Reservoir Simulation

Conventional Reservoirs: Accurate and Fast
Model simple to structurally complex, heterogeneous, oil and gas reservoirs, using small to very large scale multi-million grid cell models to achieve reliable production forecasts.


  • Model under-saturated and saturate oils, volatile oils, gas condensates, dry and wet gas reservoir fluid systems
  • Choose from multiple gridding options: Cartesian, radial, areal orthogonal and fully non-orthogonal corner point grids
  • Model naturally fractured reservoirs and gravity segregation processes using the multiple dual continuum options
  • Achieve rapid history matching and optimization of reservoir management workflows by seamlessly interfacing with CMOST AI

Secondary Oil Recovery: Improve Reservoir Deliverability
Evaluate and optimize field development plans and predict recovery for primary and secondary recovery methods in complex and heterogeneous reservoirs.


  • Predict and compare reservoir performance by applying: water injection, polymer injection, pseudo-miscible gas injection, in continuous and WAG mode
  • Implement polymer related processes by modelling adsorption, polymer degradation, shear thinning and non-linear viscosity mixing
  • Inject chase gas with different properties than the solution gas

iSegWell: Intelligent Segmented Wells
Accurately and realistically model the flow and pressure change throughout the wellbore branches, tubing strings and equipment. Optimize well completions and downhole equipment with iSegWell


  • Advanced wellbore modelling tool fully coupled to reservoir simulator
  • Wellbore modelling for gravity and friction pressure losses (horizontal and multi-lateral wells, downhole equipment, tubing)
  • Increase well capability by simultaneously optimizing well design and reservoir productivity
  • Define and use advanced flow control devices (FCDs) to optimize injection and production strategy
Unconventional Reservoirs: Efficient Production Forecasts
Use one of the most sophisticated tools for modelling naturally or hydraulically fractured reservoirs to accurately capture transient flow behavior and to achieve better production forecasts.


  • Logarithmically-spaced, locally-refined (LS-LR) grids for accurate and efficient modelling of naturally or hydraulically fractured reservoirs
  • Model longitudinal or transverse bi-wing hydraulic fractures and complex hydraulic fracture networks through a stimulated reservoir volume (SRV)
  • Achieve better-propped fracture characterization, history matching and forecasting with imported third-party hydraulic fracture simulation data
  • Model variation in permeability along the length of the fracture to more realistically capture field conditions
  • Accurately model the matrix-fracture and matrix-matrix transfer in naturally fractured reservoirs
  • Utilize various correlations to capture the effect of non-Darcy flow inside hydraulic fractures
  • Ability to characterize geometry, shape and size of the SRV using microseismic data
  • Achieve more reliable gas-in-place and reserves estimates by modelling adsorption gas contribution to production in shale and CBM reservoirs
  • Optimize well and fracture spacing to increase production, NPV and EUR

Coupled Surface Network Modelling: Optimize from Reservoir to Point of Delivery
Create explicitly-coupled subsurface and surface network models, including onshore gas storage fields and deep water offshore oil and gas fields.


  • Couple to third-party surface network simulators to model more complex (e.g. looped) surface networks
  • Coupled system modelling allows engineers to trouble-shoot bottlenecks in the entire reservoir and surface network system

Performance: Optimize Efficiency and Throughput
CMG's solver and parallelization technology maximizes hardware potential and provides you with software that runs large, complex simulation jobs in the shortest amount of time.


  • Decrease project turn-around time
  • Run more simulation jobs simultaneously and get results faster than before
  • Additional parallelization increases parallel speed-up when jobs are submitted on a higher number of cores
  • Reduce capital expenditures with efficient use of current IT hardware, no annual upgrades required
  • Quickly load results of large models using the new standardized and compressed SR3 files to maximize productivity

SPE Technical PapersWant to learn more?
Check out the SPE technical papers focused on IMEX - you'll have an opportunity to learn from our customers and our R&D team on innovative applications of IMEX in the field. Find out more...