Unconventional/complex reservoirs

Polymerflood Field Pilot Enhances Recovery of Heavy Oils on the Alaska North Slope

A pilot project validates the use of an advanced polymerflooding technology on the Alaska North Slope.

Pipeline winding in summer mountain landscape.
Pipeline winding in summer mountain landscape.
sarkophoto/Getty Images/iStockphoto

The complete paper describes a field pilot project to perform an experiment to validate the use of an advanced polymerflooding technology on the Alaska North Slope. Polymer injectivity of horizontal wells is found to be sufficient to replace reservoir production voidage, although some declines occurred as high-viscosity polymer swept the near-wellbore region. Production data show significant reduction in water cut and increase in oil production rate. No polymer production has been confirmed from the two horizontal producers after 23 months of polymer injection into the two supporting horizontal injectors.

Introduction

The pilot involves two horizontal injectors (J-23A and J-24A) and two horizontal producers (J-27 and J-28) drilled into the Schrader Bluff NB sand in an isolated fault block of the Schrader Bluff heavy-oil reservoir in the Milne Point field.

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