Reservoir EngineeringRock Properties
Ineffective Porosity from Disconnected Pore Volume Formula
Ineffective Porosity from Disconnected Pore Volume calculates ineffective porosity for rock properties workflows in reservoir engineering.
How engineers use this formula
Use this formula when the listed inputs (V_dis, V_b) are known and the assumptions behind the cited rock properties 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, phi_in equals 0.02 fraction.
V_discm^3
20
V_bcm^3
1000
Inputs
V_dis
cm^3Volume of Completely Disconnected Pores
V_b
cm^3Bulk Volume
Outputs
phi_in
fraction
Ineffective Porosity
V_dis
cm^3
Volume of Completely Disconnected Pores
V_b
cm^3
Bulk Volume
Source and review
reviewedPetroleum Reservoir Rock and Fluid Properties, Dandekar, A. Y. (2006)
Dandekar, A. Y. 2006. Petroleum Reservoir Rock and Fluid Properties. Boca Raton, FL: CRC Press Taylor & Francis Group, Chapter 3, Page 15.
Source