Over the past several years, there has been a shift to drill longer wells with tighter inter-well spacing in projects using steam assisted gravity drainage (SAGD). An understanding of the impact on performance as a result of different well length and spacing can justify such a change for future well drilling. This paper examines the performance from various McMurray formation SAGD projects in the Athabasca region that have well pairs that are developed at different lengths and spacing. Changes in bitumen rate per well-pair, recovery factor and steam to oil ratio (SOR) were assessed at different well lengths and inter-well spacing. Certain performance characteristics from pads with tighter inter-well spacing were better than wider spaced pads. Furthermore, no significant changes in performance were noted in regards to changes in length.

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