Formation temperature for a given gradient

Input(s)

$T_{s}$: Temperature Near Surface $\left(\right.$ degree $\left.{ }^{\circ} \mathrm{F}\right)$

D: Total Depth $(\mathrm{ft})$

$g_{G}$: Geothermal Gradient (degree $\left.{ }^{\circ} \mathrm{F} / 100 \mathrm{ft}\right)$

Output(s)

$T_{f}$: Formation Temperature (degree ${ }^{\circ} \mathrm{F}$ )

Formula(s)

$$ T_{f}=T_{s}+g_{G} *\left(\frac{D}{100}\right) $$

Reference(s)

Bassiouni, Z., 1994, Theory, Measurement, and Interpretation of Well Logs. SPE Textbook Series Vol. 4. Chapter 4, Page: 75.