Abstract

Type curves that are developed for bitumen recovery from the Grosmont carbonate reservoir by cyclic operation of steam injection and production through a single horizontal well, consistently match field data, thereby confirming the validity of two key simplifying assumptions:

  1. heat flow is conductive; the heat capacity of the rock dominates: This is consistent with the low porosity and high heat capacity of dolomite. As a result, heat retention in the reservoir is efficient.

  2. gravity drainage dominates the recovery mechanisms: Thermal Assisted Gas-Oil Gravity Drainage (TA-GOGD) is the dominant recovery mechanism.

The type curve method is used to evaluate unrestricted reservoir performance by quantifying operational constraints and to forecast new cycles in the pilot operations.

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