Reservoir EngineeringThermal Gradients
Geothermal Gradient from Temperature Log Interval Formula
Geothermal Gradient from Temperature Log Interval calculates geothermal gradient for thermal gradients workflows in reservoir engineering.
How engineers use this formula
Use this formula when the listed inputs (T_deep, T_shallow, z_deep, z_shallow) are known and the assumptions behind the cited thermal gradients relationship match the engineering case being checked.
Assumptions
- Input values are representative for the well, reservoir, fluid, or equipment case being evaluated.
- The declared units match the field-unit constants used in the formula.
- The cited formula applies to the selected petroleum engineering workflow.
Limitations
- The calculation does not replace a full engineering model or operating procedure.
- Accuracy depends on the source correlation, assumptions, input quality, and unit consistency.
Common mistakes
- Mixing unit systems without converting the inputs.
- Using default example values as field recommendations.
- Applying the formula outside the source assumptions.
Default example
Using the default inputs, G_C_km equals 33.333333 degC/km.
T_deepdegC
120
T_shallowdegC
20
z_deepm
3000
z_shallowm
0
Inputs
T_deep
degCDeeper Temperature Measurement
T_shallow
degCShallower Temperature Measurement
z_deep
mDeeper Measurement Depth
z_shallow
mShallower Measurement Depth
Outputs
G_C_km
degC/km
Geothermal Gradient
T_deep
degC
Deeper Temperature Measurement
T_shallow
degC
Shallower Temperature Measurement
z_deep
m
Deeper Measurement Depth
z_shallow
m
Shallower Measurement Depth
Source and review
reviewedWorld of Earth Science via Encyclopedia.com. Geothermal Gradient.
Source