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LaTeX Math Inline
bodyT_e(t, l\, x, \, y, \, z)

along-hole geothermal temperature profile

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LaTeX Math Inline
bodyt

Astronomic time

LaTeX Math Inline
bodyz(l)\lambda(x, \, y, \, z)

Rock thermal conductivity Pipeline trajectory TVDss

LaTeX Math Inline
bodyj_z(x,y)

True vertical component of Regional Earth's heat flux (usually 

LaTeX Math Inline
body--uriencoded--j_z = 25 \div 55 \ mW/m%5e2
)

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Below Neutral Temperature LayerAbove Neutral Temperature Layer


LaTeX Math Block
anchorT_g
alignmentleft
T_g(x,y,z) = T_{ref}(x,y) + \int_{z_{ref}}^z G_T(x,y,z) dz



LaTeX Math Block
anchorT_z
alignmentleft
T(t, z) = T_{srf}s + \frac{j_z}{\lambda_e} (z-z_{srf}s) + T_A \, \exp \biggleft[ \, {(z_{srf}s-z}) \sqrt{\frac{\pi}{a_e \, \delta_T}} \, \biggleft] \, \cos \biggright[  \, 2 \pi \frac{t - t_{min}}{\delta_T} + (z_{srf}s -z) \sqrt {\frac{\pi}{a_e \, \delta_T}} \, \biggright]



LaTeX Math Block
anchorG_T
alignmentleft
G_T(x, y, z) =\frac{d T_g}{d z}= \frac{j_z(x,y,z)}{\lambda_e}



where

где

LaTeX Math Inline
bodyz_s

TVDss of the Earth's surface

LaTeX Math Inline
bodyT_{srf}

Annual average surface temperature based on weather reports

LaTeX Math Inline
bodyT_A

Annual average surface temperature variation based on weather reports

LaTeX Math Inline
body\delta_T

Temperature variation cycle (usually 

LaTeX Math Inline
body--uriencoded--\delta t = 1 \, %7B\rm year%7D
)

LaTeX Math Inline
bodyt_{min}

Temperature variation cycle shift (time moment of minimal temperature with respect to astronomic midnight 0:00)

LaTeX Math Inline
bodya_e = \frac{\lambda_e}{\rho_e \, c_e}

Rock temperature conductivity

LaTeX Math Inline
body\rho_e

Rock density

LaTeX Unit
bodyc_e

Rock specific volumetric heat capacity at constant pressure

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