Oil Breakthrough Newly Swept Zone Formula
Oil Breakthrough Newly Swept Zone calculates oil volume at breakthrough in newly swept zones for waterflooding and eor workflows in reservoir engineering.
How engineers use this formula
Use this formula when the listed inputs (PV, dE_as, S_wbt, S_wi) are known and the assumptions behind the cited waterflooding and eor 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, O_nsz equals 6,000 bbl.
100000
0.2
0.55
0.25
Inputs
PV
bblPore volume basis
dE_as
fractionAreal sweep efficiency increment from newly swept zone
S_wbt
fractionWater saturation at breakthrough in swept zone
S_wi
fractionInitial water saturation
Outputs
O_nsz
Oil volume at breakthrough in newly swept zones
PV
Pore volume basis
dE_as
Areal sweep efficiency increment from newly swept zone
S_wbt
Water saturation at breakthrough in swept zone
S_wi
Initial water saturation
Source and review
reviewedEnhanced Oil Recovery, PTE 531 Oil Recovery, Ehrlich, R. (2016)
Ehrlich, R. 2016. Enhanced Oil Recovery, PTE 531 Oil Recovery, University of Southern California Lecture Notes.
Source