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Yukon Geological Survey

YGS Publication Details

Reference Number
Reference Type
Yukon Geological Survey
Document Type
Annual Report Paper

Title: An appraisal of Devonian-Mississippian shale strata in Yukon’s Liard basin
NTS Mapsheet(s): 95C
Citation: Hutchison, M.P., 2018. An appraisal of Devonian-Mississippian shale strata in Yukon’s Liard basin. In: Yukon Exploration and Geology 2017, K.E. MacFarlane (ed.), Yukon Geological Survey, p. 69-88.

Reference Location


This study presents the first shale gas appraisal of Devonian-Mississippian shale strata in Yukon’s Liard basin. Assessed volumes of 68 Tcf gas-in-place and 7.6 Tcf marketable gas are contained within two shale plays identified from an integrated wireline log and geochemical evaluation: the Devonian (Givetian-Frasnian) Horn River shale and the Devonian-Mississippian (Famennian-Tournaisian) Exshaw-Patry shale. Average burial depths of 3018 mTVD and net pay thicknesses of 73 m for the Horn River, and 2688 mTVD and 89 m for the Exshaw-Patry plays are interpreted. Both plays are dominated by black, organic-rich, siliceous mudstones, and exhibit: elevated TOC contents (0.6-6.9 wt %); maturities within or past the dry gas window (2.1-4.6 %Ro); very high biogenic silica proportions (averaging 80.2-90.3%); high mineralogical stiffness (0.80-0.87); and average porosities of 1.2% for the Horn River and 4.2% for the Exshaw-Patry play. Resource distribution models indicate 50% of Yukon’s marketable gas will be found in 30% of its assessed area, with the best potential for significant volumes located in the very southeast of the territory where play depth and thickness increases.


Hard copy publications can be obtained by contacting the Yukon Geological Survey, 102-300 Main Street, Whitehorse, Yukon, Y1A 2B5. Phone (867) 667-3201 or email geosales@gov.yk.ca.

Related Publications

Reference Type
Document Type
YEG2017 Contained By Yukon Geological Survey Annual Report Yukon Exploration and Geology 2017