A Risk-based Groundwater Modelling Study for Predicting Thermal Plume Migration from SAGD Well-pads Rudy Maji, Ph.D., Golder Associates Solaleh Khezri, M.Sc., AB Scientific Intern (Golder Associates) Don Haley, M.Sc., Golder Associates Michael De Luca, M.Sc., P.Geol., Brion Energy
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A Risk-based Groundwater Modelling Study for Predicting ... · Study for Predicting Thermal Plume Migration from SAGD ... The simulation ... A Risk-based Groundwater Modelling Study
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A Risk-based Groundwater Modelling
Study for Predicting Thermal Plume
Migration from SAGD Well-pads
Rudy Maji, Ph.D., Golder Associates
Solaleh Khezri, M.Sc., AB Scientific Intern (Golder Associates)
Don Haley, M.Sc., Golder Associates
Michael De Luca, M.Sc., P.Geol., Brion Energy
Outline
Motivation
Problem Statement
Numerical Model Construction
Numerical Model Results
Summary and Conclusions
April 30, 2015 2
Motivation –
Why Thermal Plume Migration Matters
Elevated temperatures increase the mobilization of chemical
constituents that are naturally present in sediments.
Since the start of thermal in-situ oil sand production, increased levels of
Arsenic was observed in groundwater downgradient of several steam
injection wells at the Cold Lake site.
April 30, 2015 3
Problem Statement –
Steam Assisted Gravity Drainage (SAGD)
April 30, 2015 4
Area of Interest
Problem Statement –
Conceptual Model of Heat Plumes Near Wellbores
April 30, 2015 5
Groundwater Flow
Aquitard
Aquifer
Aquifer
Aquitard
Aquitard
Problem Statement –
Modelling as a Screening Tool
Generic modeling can be used as a screening tool as one input into a
risk based assessment of solute migration from multiple SAGD well
pads.
If the risk at a particular well pad is considered potentially significant, site
specific models (deterministic or stochastic) can be developed to help
evaluate and quantify the risk of thermally enhanced solute migration.
Site specific model could also be used to aid in the design of the
Groundwater Monitoring Plan (GWMP), as directed in the DRAFT
Guidance for Groundwater Management Plans for In Situ Operations: