Motivation
Outputs
T_G(t, {\bf r}) | |
G_T({\bf r}) | Geothermal Temperature Gradient |
H_n | Neutral Temperature Layer (NTL) |
Inputs
t | Local Calendar Time | \delta T_A | Annual average surface temperature variation based on weather reports |
z(l) | A_T | Period of annual temperature variation cycle: A_T = 1 \, {\rm year} | |
{\bf j}({\bf r}) | Earth's Heat Flux | \delta t_A | Time shift of annual highest temperature with respect to January 1 |
T_s | Local annual average surface temperature based on weather reports | \delta T_D | Daily average surface temperature variation based on weather reports |
a_{en} | Local average Thermal diffusivity of the soil between Earth's surface and NTL | D_T | Period of daily temperature variation cycle: A_D = 1 \, {\rm day} |
\lambda_e({\bf r}) | Subsurface Thermal Conductivity profile as function of position vector | \delta t_D | Time shift of daily highest temperature with respect to Midnight 00:00 |
\delta T_{\rm cut} | Temperature measurement threshold (usually \delta T_{\rm cut} = 0.01 \, {\rm °C}) |
where
l | Measured Depth of wellbore trajectory with reference to Earth's surface ( l=0) |
z_s = z(l=0) |
Assumptions
Equations
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Neutral Layer | ||||||||
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See Also
Geology / Geothermal Temperature Field
[ Geothermal Temperature Profile @model ] [ Geothermal Temperature Gradient ]