MODELLING EOR TECHNIQUES USING ECLIPSE AND INTERSECT ALEXANDER SHADCHNEV, RESERVOIR ENGINEER TAOUFIK MANAI, RESERVOIR ENGINEERING ADVISOR SCHLUMBERGER INFORMATION SOLUTIONS
FORCE: EOR Process Modeling Workshop / 26.05.14 / Stavanger, 2014
EOR modelling Challenges
Increasing number of EOR projects
Modelling challenges
– Conversion from primary and
secondary recovery to EOR
– Difficult to set up EOR models
– Modelling scale
– Simulation run times
– Disconnected from operations
Source: Omer Gurpinar - SLB EOR Services
Integrated EOR Build a representative history matched
simulation model
Evaluate various EOR
development
scenarios
Engineering design of
facilities
Surveillance,
Monitoring and Optimisation
Rapid
updating of models
Understanding geological
complexities and uncertainties
High resolution
design
Chemical EOR Functionality
EO
R
Chemical Polymers
Surfactants
Solvents
Foams
Low salinity brine
Alkalis
Miscible Injection
Thermal
Log K
Alkaline
Surfactant
Polymer
Black Oil
Compositional
Miscible Injection EOR Functionality E
OR
Chemical
HC Gas
CO2
Others
Miscible Injection
Thermal
Black Oil
Compositional
Thermal EOR Functionality E
OR
Chemical
CSS
SAGD
ISC
VAPEX
Miscible Injection
Thermal
Black Oil
Compositional
EOR modelling – An incremental approach
EOR Black Oil: Add few keywords in tabular form
EOR Compositional: Add complexity when required
Start: Primary / secondary history matched model
2000 Polymer,
surfactant: 1990
Brine: 1991
WAG: before
1993
Temperature,
Thermal: 1995
CO2 solubility
in water: 1997
1990
Solids:
2003
Hysteresis 1984
Black Oil:
Low Salinity, Alkaline, Foam,
extensions to Polymer, Multi-
Component Brine, Temperature
Compositional:
Improvements to miscible flood, CO2,
Thermal;
Chemical Reactions, Water
components, Asphaltenes,
2008 2013
Continuous improvement
2014 Compositional:
Surfactant/Foam
Polymer
WAG INTERSECT Thermal Polymer Tracer
Simulators functionality development
NEW EOR functionality in 2013
Surfactant in compositional – Compatible with foam
Polymer Enhancements – Salinity dependent adsorption
– Cell based permeability reduction
– Temperature dependent permeability reduction
– Improved rheology model
– Simplified gel workflow
WAG improvements
Surfactant model in ECLIPSE 300 (new in 2013) Same effects as in the E100 surfactant model
reduction of oil-water IFT
wettability modification
Surfactant is a water component
Rock-fluid interaction via reactions
e.g. adsorption
Can be run in
Black-oil
Compositional K-values
Compositional EOS
So water flood
So surfactant
Multicomponent Water, Solids, Reactions Reach and flexible functionality
components change viscosity and density of water
components can react
in particular, water components with solids
components affect oil-water IFT
solids affect wettability
solids may block pore space
– porosity and permeability reduction
or they can dissolve and increase pore space
Temperature-Sensitive “Popping” Polymer Microgel Example technology: BrightWaterTM*
*TradeMark of Tiorco
SPE 144234: BrightWaterTM is activated by heat and time. Particles expand up to 10 times the original size; they get adsorbed and retained by the rock.
What ECLIPSE does? Polymer viscosity and residual resistance factor functions of temperature
mw = mw(Cp,T)
RRF = RRF(T)
As reservoir temperature warms the mixture, increased viscosity and
permeability reduction slows flow through thief zone
Later injection of pure water will bypass the blocked thief zone and
displace oil from low permeability regions
ECLIPSE EOR advantages
Multiple physical effects modelled
Easy transition to EOR predictions
Fast EOR screening
Add complexity if required
Results fidelity
+ CO2
+ CO2 + Polymer
FAWAG
ECLIPSE EOR Plans for 2014
Polymer in ECLIPSE black-oil
– temperature dependent adsorption
– more general rheology model
EOR in ECLIPSE compositional
– adding polymer functionality to water components
• viscosity mixing rules
• rheology
INTERSECT** Representative High Resolution
Modeling of
– Geology
– Physics
– Asset
Enabled by fast and scalable
reservoir simulation
Petrel RE simulation
environment
** Mark of Chevron, Total and Schlumberger
Fast and Scalable reservoir simulation
Fit for purpose solver
Adaptive Multi-grid solver (CPR-AMG)
Solver stability
Efficient with non-linearity
Flexible domain decomposition
Efficient allocation of work load allows
better scalability
INTERSECT EOR simulation
Full field high resolution simulation
Reduce impact of numerical dispersion
Detailed pilot design
Fast multiple realization modeling for
uncertainty management
Advanced field management logic
Single platform for every stage
EOR incremental approach
Models consistency
Transparent data transfer between
models
EOR staged modeling & evaluation
Petrel: Modeling Platform
Deployment Pilot Project Injectivity Test Detailed Analysis Preliminary
Analysis