In accordance with one embodiment of the present invention, a method is provided for accessing a plurality of subterranean zones from the surface. The method includes forming an entry well from the surface. Two or more exterior drainage wells from the entry well through the plurality of subterranean zones are formed. At least one exterior drainage well is operable to drain fluid from the plurality of subterranean zones.

 
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> In situ thermal processing of a coal formation with heat sources located at an edge of a coal layer

> Multi-purpose well bores and method for accessing a subterranean zone from the surface

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