Geomechanics and FracturingIn-Situ Stress and Rock Mechanics
Isothermal Compressibility of Limestones - Newman Correlation Formula
Isothermal Compressibility of Limestones - Newman Correlation calculates isothermal compressibility of limestones for in-situ stress and rock mechanics workflows in geomechanics and fracturing.
How engineers use this formula
Use this formula when the listed inputs (phi) are known and the assumptions behind the cited in-situ stress and rock mechanics 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, C_t equals 0.000004 psi^-1.
phifraction
0.15
Inputs
phi
fractionPorosity
Outputs
C_t
psi^-1
Isothermal Compressibility of Limestones
phi
fraction
Porosity
Source and review
reviewedCraft and Hawkins. Applied Petroleum Reservoir Engineering, Page 11.
SourceRelated formulas and calculators
Spherical Matrix Block Interporosity Flow Coefficient
Naturally Fractured Reservoirs