Interpreting a 3C-3D Interpreting a 3C-3D seismic survey, Ross seismic survey, Ross Lake, Saskatchewan Lake, Saskatchewan Chuandong (Richard) Xu Chuandong (Richard) Xu and and Robert R. Stewart Robert R. Stewart CREWES Sponsors Meeting, Nov. CREWES Sponsors Meeting, Nov. 21, 2003 21, 2003
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Interpreting a 3C-3D seismic survey, Ross Lake, Saskatchewan Chuandong (Richard) Xu and Robert R. Stewart Robert R. Stewart CREWES Sponsors Meeting, Nov.
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Interpreting a 3C-3D Interpreting a 3C-3D seismic survey, Ross Lake, seismic survey, Ross Lake,
IntroductionIntroduction Geology (channel sands)Geology (channel sands) 3C-3D seismic and VSP data3C-3D seismic and VSP data Interpretation of PP & PS sections, Interpretation of PP & PS sections,
isochrons, and Vp/Vsisochrons, and Vp/Vs Summary & AcknowledgementsSummary & Acknowledgements
IntroductionIntroduction
Ross Lake located in southwestern Saskatchewan. Ross Lake located in southwestern Saskatchewan. Target: Sandbars in Dimmock Creek Member of the Target: Sandbars in Dimmock Creek Member of the
Cantuar Formation of Mannville Group, Lower Cantuar Formation of Mannville Group, Lower Cretaceous.Cretaceous.
High porosity (>30%) and high permeability (3 Darcy). High porosity (>30%) and high permeability (3 Darcy). Heavy Oil, 13Heavy Oil, 13° API. ° API. 4 vertical wells + 1 horizontal well in this area.4 vertical wells + 1 horizontal well in this area. No gas cap, not waterflooded.No gas cap, not waterflooded.
(from Christopher, 1974)
Geology
(from Vanbeselaere, 1995)
Acquisition of 3C-3D seismic survey
Shot in May, 2002Shot in May, 2002 Field parameters:Field parameters:
Source: Source: Dynamite 0.5 kg @ 15 m DepthDynamite 0.5 kg @ 15 m Depth
E-W receiver-line spacing = 180 mE-W receiver-line spacing = 180 m Record length: 5000 ms @ 2 ms sample rateRecord length: 5000 ms @ 2 ms sample rate CDP Bin size: 25m CDP Bin size: 25m × 25m with fold of 45× 25m with fold of 45 After processing, NS Inline 1-91, EW Xline 1-132, about 7.5 kmAfter processing, NS Inline 1-91, EW Xline 1-132, about 7.5 km22
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Acquisition of the walkaway VSP
Shot in June, 2003Shot in June, 2003 Zero-offset VSP: offset=53.67 mZero-offset VSP: offset=53.67 m
Husky Energy Inc.Husky Energy Inc. Larry Mewhort, Kenneth Hedlin and Larry Mewhort, Kenneth Hedlin and
Angela Ricci from HuskyAngela Ricci from Husky Larissa Bezouchko from SchlumbergerLarissa Bezouchko from Schlumberger Hampson-Russell for donating ProMCHampson-Russell for donating ProMC Sponsors of CREWESSponsors of CREWES