Reservoir Management in a Deepwater Subsea Field--The Schiehallion Experience
- Alastair H. Govan (BP Exploration Europe) | Tim Primmer (BP Exploration Europe) | Cameron C. Douglas (BP Intl. Ltd.) | Neil Moodie (BP Exploration Europe) | Merv Davies (BP Exploration Europe) | Ferry Nieuwland (BP)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- August 2006
- Document Type
- Journal Paper
- 382 - 390
- 2006. Society of Petroleum Engineers
- 5.6.10 Seismic (Four Dimensional) Monitoring, 5.6.4 Drillstem/Well Testing, 5.6.5 Tracers, 2.4.3 Sand/Solids Control, 4.1.5 Processing Equipment, 4.3.4 Scale, 5.1.5 Geologic Modeling, 5.2.1 Phase Behavior and PVT Measurements, 5.1.7 Seismic Processing and Interpretation, 3.3.1 Production Logging, 5.4.1 Waterflooding, 4.1.2 Separation and Treating, 1.6 Drilling Operations, 5.5.11 Formation Testing (e.g., Wireline, LWD), 5.1.2 Faults and Fracture Characterisation, 5.7.2 Recovery Factors, 5.1.9 Four-Dimensional and Four-Component Seismic, 4.5.3 Floating Production Systems, 5.5.8 History Matching, 5.6.3 Pressure Transient Testing, 6.5.2 Water use, produced water discharge and disposal
- 6 in the last 30 days
- 980 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 12.00|
|SPE Non-Member Price:||USD 35.00|
The Schiehallion field has experienced many reservoir management challenges since first production in 1998. Dynamic data such as formation pressures, pressure-transient analysis, interference testing, tracer analysis, and 4D seismic need to be interpreted with great care—Schiehallion has examples in which the data have been invaluable and others in which the data are ambiguous or misleading. It is essential to integrate several data types to obtain reliable conclusions. This paper describes some of the highlights and pitfalls experienced in Schiehallion.
The Schiehallion field is situated on the Atlantic margin of the United Kingdom Continental Shelf (UKCS), to the west of the Shetland Islands, in water depths of approximately 400 m (Fig. 1). Together with the smaller satellite Loyal field, it is produced through subsea horizontal wells tied back to the Schiehallion floating production, storage, and offloading (FPSO) vessel. The combination of water depth with strong winds and currents, creating waves up to 30 m high, makes this one of the most hostile environments in the world for hydrocarbon production.
The reservoir is a deepwater turbidite of Tertiary age deposited in the Faroe-Shetland basin (Ebdon et al. 1995; Lamers and Carmichael 1999; Mitchell et al. 1993; Morton et al. 2002) and showing varying degrees of channelization in different parts of the field (Fig. 2). Permeability is generally good (approximately 600 md), but the low reservoir depth (2000 m), low gas/oil ratio (GOR) (340 scf/bbl) and limited aquifer provide little natural energy, so water injection is critical. Seismic data quality is mostly very good.
|File Size||3 MB||Number of Pages||9|
Campbell, S., Ricketts, T.A., Davies,D.M. et al. 2005. Improved 4D Seismic Repeatability—A West of Shetlands TowedStreamer Acquisition Case History. Proc., 75th Annual Intl. Meeting ofthe Soc. of Exploration Geophysicists, 2394-2397.
Clark, J.D. and Pickering, K.T. 1996.Submarine Channels: Processes and Architecture. London: VallisPress.
Earlougher, R.C. 1977. Advances inWell Test Analysis. Monograph Series, SPE, Dallas (1977) 5:58.
Ebdon, C.C., Granger, P.J., Johnson,H.D., and Evans, A.M. 1995. Early Tertiary Evolution and Sequence Stratigraphyof the Faeroe-Shetland Basin: Implications for Hydrocarbon Prospectivity. InThe Tectonics, Sedimentation and Palaeoceanography of the North AtlanticRegion, eds. R.A. Scrutton, M.S. Stoker, G.B. Shimmfield, and A.W. Tudhope,90: 51-69. London: Geological Society, Special Publications.
Lamers, E. and Carmichael, S.M.M. 1999.The Paleocene Deepwater Sandstone Play West of Shetland. In PetroleumGeology of Northwest Europe: Proc. of the 5th Conference, eds. A.J. Fleetand S.A.R. Boldy, 645-659. London: Geological Soc.
Lia, O. and Gjerde, J. 1998. A MarkedPoint Process Model Conditioned on Inverted Seismic Data. In IAMG '98 Proc.of the Fourth Annual Conference of the International Association forMathematical Geology, Ischia, Italy, 794-799.
Mitchell, S.M., Beamish, W.J., Wood, M.V.et al. 1993. Paleogene Sequence Stratigraphic Framework of the Faroe Basin. InPetroleum Geology of Northwest Europe: Proc. of the 4th Conference, ed.J.R. Parker, 1011-1-23. London: Geological Soc.
Morton, A.C., Boyd, J.D., and Ewen, D.F.2002. Evolution of Palaeocene Sediment Dispersal Systems in the FoinavenSub-Basin, West of Shetland. In The North Atlantic igneous province:stratigraphy, tectonics, volcanics and magmatic processes, ed. D.W. Jolleyand B.R. Bell, 69-93. London: Geological Society Special Publication197.
Whitcombe, D. and Fletcher, J. 2001. TheAIGI Crossplot as an Aid to AVO Analysis and Calibration. In Proc., 71stAnnual Intl. Meeting, Soc. of Exploration Geophysicists, San Antonio,Texas, 219-222.
Zemel, B. 1995. Tracers in the OilField. New York City: Elsevier.