08267170 is referenced by 42 patents and cites 1132 patents.

A plurality of first barrier wells are formed in a formation for a first barrier. A substantially constant spacing separates adjacent first barrier wells. The formation is analyzed to determine the principal fracture direction of at least one layer of the formation. An offset distance of second barrier wells relative to first barrier wells is determined based on the principal fracture direction to limit a maximum separation distance between a closest barrier well and a theoretical fracture extending between the first barrier and the second barrier along the principal fracture direction to a distance of less than one half of the spacing that separates adjacent first barrier wells. The second barrier wells are offset from the first barrier wells by a distance that is at least substantially the same as the offset distance.

Title
Offset barrier wells in subsurface formations
Application Number
12/576790
Publication Number
8267170 (B2)
Application Date
October 9, 2009
Publication Date
September 18, 2012
Inventor
Billy John McKinzie
Houston
TX, US
Thomas David Fowler
Houston
TX, US
Assignee
Shell Oil Company
TX, US
IPC
E21B 47/10
E21B 47/026
E21B 43/30
E21B 43/24
E21B 36/00
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