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Integration of Steam-assisted Gravity Drainage Fundamentals with Reservoir Characterization to Optimize Production

By
Rudy Strobl
Rudy Strobl
Statoil Canada Ltd., 3600 308 4th Ave. SW, Calgary, Alberta, T2P 0H7, Canada (e-mail: rudstr@statoil.com)
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Published:
January 01, 2013

Abstract

Traditionally, in-situ oil sands operators use the simple approach of placing steam-assisted gravity drainage (SAGD) well pairs as close to the base of pay as possible, with the expectation that the effects of reservoir heterogeneity will be mitigated by the use of longer well pairs. It has been proven, however, that the geometry associated with the top and base of the SAGD pay interval and the distribution of reservoir lithofacies within the pay interval have a significant impact on SAGD performance. This chapter proposes that optimal well placement and selective completion strategies can more effectively address reservoir heterogeneity issues, provided that a three-dimensional (3-D) model of the SAGD reservoir and an ultimately fuller understanding of the evolution of the steam chamber over time exist. By applying strong scientific principles and consistent SAGD strategies, top operators have demonstrated that improved reservoir performance is possible, evidenced by higher production rates, lower steam-oil ratios, and maximized recoverable reserves.

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Contents

AAPG Studies in Geology

Heavy-oil and Oil-sand Petroleum Systems in Alberta and Beyond

Frances J. Hein
Frances J. Hein
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Dale Leckie
Dale Leckie
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Steve Larter
Steve Larter
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John R. Suter
John R. Suter
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American Association of Petroleum Geologists
Volume
64
ISBN electronic:
9781629812649
Publication date:
January 01, 2013

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