thermal gradient — Oil & Gas Glossary
The rate of increase in temperature per unit depth in the Earth. Although the thermal gradient varies from place to place, it averages 25 to 30 oC/km [15 oF/1000 ft].
The rate of increase in temperature per unit depth in the Earth. Although the thermal gradient varies from place to place, it averages 25 to 30 oC/km [15 oF/1000 ft].