Patent ID: 8381815
Filing Date: 2013-02-26
Classification: C09K,C10G,E21B,Y10T

Abstract:
1. A method for treating a tar sands formation, comprising: providing heat to at least part of a hydrocarbon layer in the formation from a plurality of heaters located in the formation; allowing the heat to transfer from the heaters to at least a portion of the formation; producing fluids from the formation through at least one production well that is located in at least two zones in the formation, the first zone having an initial permeability of at least 1 darcy, the second zone having an initial permeability of at most 0.1 darcy and the two zones are at least partially separated by a barrier with an initial permeability of at most 10 μdarcy; and heating such that an average pressure in the two zones is within about 20% of each other.