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Assessing the geothermal potential of the St. Lawrence Lowlands sedimentary basin in Quebec, Canada

39th IAH Congress, 2012, Niagara-Falls, ON
by

Jasmin Raymond

on 5 November 2014

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Transcript of Assessing the geothermal potential of the St. Lawrence Lowlands sedimentary basin in Quebec, Canada

Assessing the ge thermal potential
of the St. Lawrence Lowlands sedimentary basin
in Quebec, Canada

Jasmin Raymond, Michel Malo, Félix-Antoine Comeau, Karine Bédard, René Lefebvre & René Therrien
Geothermal power production from
low-T
resources (80-120°C) is becoming feasible with
new tech
Hybrid
gas/geo
power plants (Borsukiewicz-Gozdur 2010)
Carbon-dioxide
plume
geothermal systems (Randolph and Saar 2011)
E
nhanced
G
eothermal
S
ystems (Tester et al. 2010)
SLL
www.erable.ca
Located in
southern
Quebec
20 000
km2
Most
populated
area of the province
Porosity 3.7-6.1 %
Permeability
0.12-0.24 mD
Thick
Cap
Rock
Geothermal
Potential
Assessment
Objective
Define
depth
and
temperature
of reservoir
formations
Method
Development of a
3D
geological
model
Surface
geological map
Map of
basement top
(two-way travel time)
164
well logs
(441 contacts)
Generation of
2D maps
showing
depth
of units
Superposition of
uncorrected
bottom hole
temperature
on 2D maps (41 measurements)
3D
geological
model
- GOCAD
Rock units are
deepening
and
thickening
toward the
southeast
Depth of the top of the
Cairnside
Formation
Depth of the top of the
Covey Hill
Formation
Depth of the top of the
Precambrian
basement
Geothermal
Potential
Assessment
Most promising areas are located along
Logan’s Line
and to the southeast
Where the
Postdam Group
has a
depth
of more than
3 km

Uncorrected temperature
measurements were higher than
70 °C
Cap rock
of
low thermal conductivity
may explain thermal anomalies (99 °C @ 3.1 km depth)
Increase of
drilling depth
southeasterly may
limit
geothermal development
Conclusions

Hydrothermal systems with temperature
above 80°C
can be found at
3 to 5 km depth
in the Cairnside and Covey Hill Formations
Exploitation of such resources can be achieved with
hybrid gas/geo
power
plants

Greater temperature
with potential for enhanced geothermal systems can occur in the Precambrian
basement
Hybrid
gas/geo
plant
(Borsukiewicz-Gozdur, 2010)
Full transcript