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G

EM

GEM is a full Equation of State compositional reservoirsimulator with advanced features for modelling recoveryprocesses where the fluid composition affects recovery.GEM also models Asphaltenes, Coal Bed Methane and theGeochemistry for the sequestration of various gases includingAcid Gases and CO2.

GEM provides reservoir simulation capabilities that go beyond theabilities of conventional black oil and K-value compositional simulators,including the effects of asphaltene precipitation and plugging. It is alsothe industrys leading Coal Bed Methane (CBM) simulator, as it canprovide accurate early time water and methane production predictions, aswell as multi-component production predictions for Enhanced CBM(ECBM) recovery. The ECBM features include extended LangmuirIsotherms to model the preferential adsorption of CO2and other gasesand models for coal shrinkage and swelling. The extensive capabilities forrepresenting asphaltene behavior and geochemical effects make GEM themost robust compositional simulator available today.

Hydrocarbon and Acid Gas Injection

Multiple contact miscibility

Swelling

Viscosity reduction

Lowering of interfacial tension

Gas solubility in the aqueous phase

WAG process

Relative permeability hysteresis

VAPEX processes for heavy oil

Molecular diffusion and convective dispersion

Asphaltene precipitation, flocculation, depositionand plugging

Gas, Gas Condensate and Volatile Oil

Gas Cycling and Re-cycling

Condensate blocking

Underground Gas Storage

GEMGeneralized Equation of State Model Reservoir Simulator

Dynamic Reservoir Modellwww.cmgl

Primary & Enhanced Coal Bed Methane

Primary Depletion

Coal Shrinkage and Swelling

Flue Gas, CO2 and N2 Injection for enhancedCBM recovery

Green House Gas Sequestration

CO2 and other acid gas storage

Aqueous equilibrium chemical reactions

Mineral dissolution and precipitation

Thermal Effects

Joule-Thompson near wellbore cooling

Deferential temperature water injection

Fractured Reservoirs

Naturally Fractured Reservoirs

Hydraulically Fractured Reservoirs

Fractured Gas Condensed Wells

Gas-Oil Gravity Drainage

The following is a general list of applications of GEM:

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IMEX

IMplicit-EXplici

Black Oil Simula

STARS

Steam, Thermaand Advanced pro

ReservoirSimula

GEMCompositional Sim

RESULTS

Post-Processin

Applications

TECHNOLOG

LAUNCHER

BUILDER

Pre-Processing

Applications

WINPROP

Phase Behavior Ana

Advanced Features of

GEM include:

Phase Equilibrium Models

Equation of state for oil and gas

Henrys law for gas solubility in the aqueous phase

Solid model for asphaltene

Activity coefficient model for ions in the

aqueous phase

Water vaporization into the gas phase

Modelling of CO2 and Other Acid Gases

Comprehensive modelling of gas solubility in theaqueous phase

Comprehensive geochemistry: intra aqueousreactions, and mineral dissolutionand precipitation

CBM & ECBM Modelling

Standard and Extended multi-componentLangmuir Isotherms

Palmer-Mansoori Shrinkage/Swelling (standard &multi-component)

Asphaltene Modelling

Thermodynamic model for asphaltene precipitation

Reaction kinetics for asphaltene flocculation

Surface deposition, plugging and re-entrainment

Separators

EOS modelling for surface separators with gasplant separator stages

Optimize separator conditions for best overallrecovery

Naturally and Hydraulically FracturedReservoir Modelling Dual porosity

Dual permeability

Sub-domain dual permeability

Matrix-fracture diffusion

Multi-phase non-Darcy flow

Rate dependant relative permeability Integrated to Pinnacle Technologies, Inc.s

FracProPT fracture design software

Integrated to Fracture Technologies Ltds

WellWhiz well, completion and fracture

design software

Dynamic Reservoir Modellingwww.cmgl.ca

For more information or to arrange a demonstration of GEMs capabilities ioffice, contact any of the CMG Marketing and Sales offices worldwide:

Head Office:(Calgary, Canada) 1-403-531-1300 Fax:1-403-289-8502 Email:cmgl@cmgl

Beijing, China Caracas, Venezuela Houston, U.S.A. London, U.K.

86-10-6209-8540 58-212-993-3990 1-281-872-8500 44-1491-832-447

CMGs SuitIntegrate

Modelling T

Advanced Gridding Options

Fundamental Grid options: Cartesian, Corner-Point,Cylindrical, & fully unstructured

Multi-Level, Static or Recurrent Local Grid Refinement (LGR)

Dynamic Gridding (DynaGrid) fully dynamic gridrefinement and amalgamation

Comprehensive Well Management

Full featured production and injection well controls

Field, group, platform, and well level controls

Targets, constraints, and monitoring

Well and group hierarchies

Voidage replacement

Gas lift optimization

Well, Well Group & Surface Manifold Modelling

Fully Coupled Wellbore modelling via source/sink well model,

Wellbore hydraulics via hydraulics tables or correlations

Multi-Lateral Wells

Multiple Platform Support, Windows, Linux, UNIX

GEM supports the following Operating SystemsWindows XP (32 bit and x64)Linux: Red Hat 7.3 (32 bit) and Red Hat Enterprise 3.0 (64 bit)IBM AIX 5L (5.1 & higher)

Performance Enhancing Features

DynaGrid (Dynamic Gridding) fully dynamic grid refinement andamalgamation. This unique feature places small grid blocks in themodel where and when required and large blocks throughout theremainder of the model. Typical model run time decreases rangefrom 2 to 5 times.

Parrallel Processing multi-CPU parrallel processing is supportedproviding significant decreases in model run times. CMGs uniqueparallellization method enables ANY model to be parallellizedregardless of the complexity of the grid or the location of wells.

ParaDyne this powerful combination of parallel processing anddynamic gridding multiplies the run time reduction factors from bothoptions, resulting in reductions of 3 to 30 times depending on modelparameters and number of CPUs utilized.