GEOPHIRES-X/tests/examples/example_SBT_ULoop.txt at main · NatLabRockies/GEOPHIRES-X · GitHub

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# SBT ULoop Case

### ** Reservoir/Material Parameters ** ###

Reservoir Model, 8,                 -- CLG SBT Model

Reservoir Volume Option, 4,         -- RES_VOL_ONLY
Reservoir Volume, 2400000000,       -- m^3
Reservoir Density, 2500,            -- kg/m^3
Reservoir Heat Capacity, 1100,      -- J/kgK
Reservoir Thermal Conductivity, 3,  -- W/m/K
Number of Segments, 1,              -- rock segments; SBT assumes only one layer of rock - hard rock in our case
Gradient 1, 50,                     -- C/km
Ambient Temperature, 14,            -- degC
Surface Temperature, 12,            -- degC

### ** Wellbore ** ###

# FLUID
Heat Transfer Fluid, 1,             -- Water
Water Thermal Conductivity, 0.6,    -- Default; reasonable assumption
Production Flow Rate per Well, 20,  -- kg/s
Injection Temperature, 20,          -- degC

# VERTICAL WELLS
Number of Injection Wells, 1,       -- accounts for cost of drilling first vertical bore
Number of Production Wells, 1,      -- accounts for cost of drilling second vertical bore
Production Well Diameter, 8.5,      -- inch
Injection Well Diameter, 8.5,       -- inch
Ramey Production Wellbore Model, 0, -- not applied
Reservoir Impedance, 0.001,         -- note that in GEOPHIRES "impedance" only affects the pumping power required (and associated O&M); CLG is not pumped (Thermosiphon effect)
Vertical Section Length, 2000,      -- depth at which vertical section terminates
Vertical Wellbore Spacing, 1000,    -- this is the lateral length when generating the wireframe

# CLG CONTROLS (SET UP SBT)
Well Geometry Configuration, 1,     -- ULOOP = 1
Is AGS, True,                       -- trigger SBT
Has Nonvertical Section, True,      -- laterals
Multilaterals Cased, False,         -- open hole; assume sealed with proprietary sealant (e.g. Eavor's Rock Seal)
Number of Multilateral Sections, 2, -- number of laterals
SBT Accuracy Desired, 5,            -- model calculation accuracy
Discretization Length, 80,          -- line source discretization
SBT Generate Wireframe Graphics, True, -- show modeled geometry = True; don't show = False

# CLG SBT LATERAL GEOMETRY (2-LATERAL U-LOOP)
Nonvertical Wellbore Diameter, 0.216, -- m
Junction Depth, 1000,               -- m; reservoir depth
Lateral Spacing, 40,                -- m; spacing between laterals (ensures pulse non-interference over time)

### ** Economics ** ###
End-Use Option, 2,                  -- direct-use heat
Plant Lifetime, 40,                 -- assumed plant life = CLGWG webapp years (40)
Economic Model, 2,                  -- LCOH
All-in Vertical Drilling Costs, 800
All-in Nonvertical Drilling Costs, 800
End-Use Efficiency Factor, 0.82,    -- assume 18% heat loss in hypothetical heating scenario
Circulation Pump Efficiency, 0.80,  -- GETEM current assumption
Utilization Factor, 0.60,           -- heating end-use potentially having utilization factor of 60%
Reservoir Stimulation Capital Cost, 0
Exploration Capital Cost, 0
Starting Heat Sale Price, 0.05
Ending Heat Sale Price, 0.05