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Case Studies

Uncovering Waterflood Potential within the Low Permeability Midale

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Canada / 2017 / Reservoir Characterization

Involved a low permeability reservoir with multi-stage hydraulically fractured horizontal wells

Needed to understand the potential for waterflooding

Generated a reservoir simulation model to investigate waterflooding and well-spacing scenarios

Revealed importance of timing of injector conversions and well spacing

Challenge

  • The client wanted to determine the feasibility of implementing a waterflood to increase oil recovery in the field
  • The producing formation of interest is the Mississippian-aged Midale Beds of the Charles Formation within the Madison Group
  • The carbonate reservoir contains light oil under natural depletion
  • The zone is currently being developed with multi-stage hydraulically fractured horizontal wells

Solution

  • Sproule conducted a geological evaluation to develop reservoir maps and parameters for a selected client-operated section of the field
  • Engineers constructed a detailed reservoir simulation model with local grid refinement to model the hydraulic fractures, and matched history to available performance data
  • Forecasts showed the benefits of waterflooding, the timing of injector conversions and the effects of different well spacing

Value

  • Sproule determined primary and waterflood recovery factor profiles through performance forecasting with the model
  • The study results helped the client understand waterflood response times and the impact of denser well spacing
  • The results underscored the importance of timing the conversion of a well to the success of a waterflood