Skip to Main Content
Book Chapter

Chapter 15: Geostatistical Reservoir Modeling Focusing on the Effect of Mudstone Clasts on Permeability for the Steam-assisted Gravity Drainage Process in the Athabasca Oil Sands

By
Koji Kashihara
Koji Kashihara
1
Research Center, JAPEX, Chiba, Japan.
Search for other works by this author on:
Akihisa Takahashi
Akihisa Takahashi
2
Exploration Division, JAPEX, Tokyo, Japan.
Search for other works by this author on:
Takashi Tsuji
Takashi Tsuji
1
Research Center, JAPEX, Chiba, Japan.
Search for other works by this author on:
Takahiro Torigoe
Takahiro Torigoe
2
Exploration Division, JAPEX, Tokyo, Japan.
Search for other works by this author on:
Koji Hosokoshi
Koji Hosokoshi
3
Development Division, JAPEX, Tokyo, Japan.
Search for other works by this author on:
Kenji Endo
Kenji Endo
4
Reservoir Engineering, JACOS, Calgary, Alberta, Canada.
Search for other works by this author on:
Published:
January 01, 2010

Introduction

Steam-assisted gravity drainage (SAGD) method is a heavy-oil in situ recovery technique used for bitumen production of the Athabasca Oil Sands, where bitumen reserves from oil sands are estimated at 173 billion barrels (Alberta Energy and Utilities Board, 2008). The typical configuration of the SAGD includes two horizontal wells of 750 m in length and vertically separated by 5 m, in which the upper well is used for steam injection to increase the mobility of the bitumen and the lower well is for bitumen production. Feasible bitumen recovery from oil sands by SAGD is limited within the lateral perpendicular distance of approximately 50 m from the horizontal well pairs. Therefore, profitably viable bitumen production performance requires that the SAGD well pair location be at thick reservoir sands. The complexity of facies distribution in the target formation requires effort in understanding detailed distribution of the reservoir sands. A deterministically constructed geologic model was visualized to better understand 3D distribution of the reservoir sands in the study area (Takahashi et al., 2006). Because lateral continuity of the lithologic facies in the area of interest is shorter than typical interwell distance, the deterministically predicted facies distribution leaves inherent uncertainty in terms of the bitumen production forecasting.

The reservoir sand facies can contain impermeable thin mudstone layers and impermeable mudstone clasts. Previous works including Schmitt (2004) and Takahashi et al. (2006) often refer to the thin mudstone layers adversely affecting the growth of the steam chamber during the SAGD process and consequent bitumen production performance. Although the mudstone clasts have not been often discussed in regard to the impact on the bitumen production performance, our field operation has experienced unexpectedly lowered bitumen production from the reservoir containing the mudstone clasts.

You do not currently have access to this article.

Figures & Tables

Contents

Geophysical Developments Series

Heavy Oils: Reservoir Characterization and Production Monitoring

Satinder Chopra
Satinder Chopra
Search for other works by this author on:
Laurence R. Lines
Laurence R. Lines
Search for other works by this author on:
Douglas R. Schmitt
Douglas R. Schmitt
Search for other works by this author on:
Michael L. Batzle
Michael L. Batzle
Search for other works by this author on:
Society of Exploration Geophysicists
Volume
13
ISBN electronic:
9781560802235
Publication date:
January 01, 2010

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal