Wellbore Temperature Profile (Ramey) Calculator
Model fluid temperature distribution as a function of depth, geothermal gradient, injection flow rate, and overall wellbore heat transfer coefficient.
Geothermal & Operational Parameters
Injection: surface water temp.
Calculated Temperatures
Bottomhole Fluid Temp:
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Static Formation BHT:
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Mid-Depth Fluid Temp (50%):
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Bottomhole Cooling / Warming:
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Calculated Ramey Length A:
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Heat Transfer Dominance:
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Ramey's Wellbore Heat Transmission (1962)
Henry J. Ramey Jr.’s analytical solution is the industry gold-standard formulation for estimating downhole temperature transients during fluid injection and production. It accounts for radial conduction into the semi-infinite formation coupled with fluid advection along the tubing.
The Fundamental Analytical Equation
T(z, t) = T_surf + g·z - g·A + (T_in - T_surf + g·A) · e^(-z / A)