07635023 is referenced by 187 patents and cites 939 patents.

A method for treating a hydrocarbon containing formation may include providing heat to a first hydrocarbon layer in the formation from a first heater located in an opening in the formation. The opening and the first heater may have a horizontal or inclined portion located in the first hydrocarbon layer and at least one connecting portion extending between the horizontal or inclined portion and the surface. Isolation material is placed in the opening such that the isolation material partially isolates the layer in which the horizontal or inclined portion of the first heater is located. An additional horizontal or inclined opening portion that extends from at least one of the connecting portions of the opening is formed in a second hydrocarbon layer. A second heater to provide heat the second hydrocarbon formation is placed in the additional substantially horizontal opening portion.

Title
Time sequenced heating of multiple layers in a hydrocarbon containing formation
Application Number
11/788859
Publication Number
7635023 (B2)
Application Date
April 20, 2007
Publication Date
December 22, 2009
Inventor
Harold J Vinegar
Bellaire
TX, US
David Scott Miller
Katy
TX, US
Arthur Herman Hale
Houston
TX, US
Bernard Goldberg
Houston
TX, US
Assignee
Shell Oil Company
TX, US
IPC
E21B 43/30
E21B 43/24
E21B 33/13
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