Case Studies

CO2 EOR And Sequestration For A Western Canadian Tight Oil Reservoir

Subsurface Dynamics is an independent engineering and geoscience consulting firm with extensive experience in reservoir characterization, modeling and simulation.  We provide a full spectrum of engineering and geophysical services from data acquisition to final data integration and full field development programs.

"Subsurface Dynamics was tasked with assessing the feasibility of multiple EOR schemes (Waterflood, CO2 flood, and Water Alternating Gas - WAG) for a hydraulically fractured tight-oil reservoir in Western Canada.

Project Summary

Subsurface Dynamics was tasked with assessing the feasibility of multiple EOR schemes (Waterflood, CO2 flood, and Water Alternating Gas – WAG) for a hydraulically fractured tight-oil reservoir in Western Canada.

client : CONFIDENTIAL

FIELD : CONFIDENTIAL, WESTERN CANADA

Scope of Work

Using geological models provided by the client, Subsurface Dynamics reviewed and prepared the static model for simulation. A PVT model was calibrated using lab data and comprehensive history-matching was performed on 16 hydraulically-fractured wells using a black oil simulator. The history-matched model was then upgraded to a compositional model for final tuning before EOR optimizations were performed under Waterflood, CO2 flood, and WAG.

Result

  • Quality history-match achieved with historical oil, gas, and pressure data

  • 10-component PVT model constructed and tuned to lab data for use with the compositional  simulator

  • All 3 EOR schemes were shown to notably improve oil recovery within the model:
    • 116% with waterflood
    • 125% with WAG
    • 205% with CO2

  • Injectant impurities, including oxygen and argon, were shown to reduce the efficacy of the CO2 flooding scheme

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