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LaTeX Math Inline
bodyT_e(t, l)

Along-hole Geothermal Temperature Profile

LaTeX Math Inline
bodyG_T(z)

Geothermal Temperature Gradient

LaTeX Math Inline
bodyH_N

Neutral Geothermal Temperature Layer (NTL)

Inputs

LaTeX Math Inline
bodyt

Local Calendar Time

LaTeX Math Inline
body\delta T_A

Annual average surface temperature variation based on weather reports

LaTeX Math Inline
bodyz(l)

Wellbore trajectory. True Vertical Depth Sub-Sea (TVDss)

LaTeX Math Inline
bodyA_T

Period of annual temperature variation cycle:

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

LaTeX Math Inline
bodyj_z

True vertical component of regional Earth's Heat Flux

LaTeX Math Inline
body\delta t_A

Time shift of annual highest temperature with respect to January 1

LaTeX Math Inline
bodyT_s

Local annual average surface temperature based on weather reports

LaTeX Math Inline
body\delta T_D

Daily average surface temperature variation based on weather reports

LaTeX Math Inline
bodya_e

Local average Thermal diffusivity of the soil between Earth's surface and neutral layerand NTL

LaTeX Math Inline
bodyD_T

Period of daily temperature variation cycle:

LaTeX Math Inline
body--uriencoded--A_D = 1 \, %7B\rm day%7D

LaTeX Math Inline
body\lambda_r(z)

Subsurface Thermal Conductivity profile as function of TVDss

LaTeX Math Inline
body\delta t_D

Time shift of daily highest temperature with respect to Midnight 00:00



LaTeX Math Inline
body--uriencoded--\delta T_%7B\rm cut%7D

Temperature measurement threshold (usually

LaTeX Math Inline
body--uriencoded--\delta T_%7B\rm cut%7D = 0.001 \, %7B\rm °C%7D
) 

where

LaTeX Math Inline
bodyl

wellbore trajectory Measured Depth with reference to Earth's surface (

LaTeX Math Inline
bodyl=0
)


Assumptions

LaTeX Math Inline
body--uriencoded--%7B \bf j%7D(x,y,z) = \%7B 0, \, 0 , \, j_z = %7B\rm const%7D \%7D

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