Petex: Water Flood Optimisation

Petex: Water Flood Optimisation

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Context

  • Large onshore oil field

  • Naturally Flowing and ESP wells

  • Water injection (water flood) to maximise recovery

Objectives

  • Primary Objectives

  • Reservoir Management and Optimisation

  • Maximise reserves (recovery)

  • Optimise production (within above long term strategy)

  • Secondary Objectives

  • Field Surveillance and Monitoring

Challenges

  • The optimisation of recovery requires understanding the dynamic processes inside the reservoir and the ability to assess the impact of actions taken today will have in 10, 20 years’ time.

  • This requires the appropriate reservoir model to be part of an Integrated Production Model (IPM).

  • Processes that continually validate the wells and network are well established. However, the validity of the reservoir models are assessed less frequently.

  • In practice this involves incorporating many different processes, data and disciplines to do successfully.

Solution

  • Rigorous procedure for validating different reservoir realisations/models.

  • The integration of a valid numerical reservoir simulation model allows us to incorporate activities including:

  • Water Injection allocation

  • Water flood management optimisation

  • Voidage replacement monitoring

  • Water breakthrough time prediction

  • Short/Medium/Long term Forecasting

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