Production EngineeringInjection Wells
Cumulative Water Injected for Hall Plot Formula
Cumulative Water Injected for Hall Plot calculates cumulative water injected for injection wells workflows in production engineering.
How engineers use this formula
Use this formula when the listed inputs (W_prev, q_i, Delta_t) are known and the assumptions behind the cited injection wells 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, W_i equals 145,000 bbl.
W_prevbbl
100000
q_ibbl/day
1500
Delta_tday
30
Inputs
W_prev
bblPrevious Cumulative Water Injected
q_i
bbl/dayAverage Injection Rate
Delta_t
dayInjection Days in Period
Outputs
W_i
bbl
Cumulative Water Injected
W_prev
bbl
Previous Cumulative Water Injected
q_i
bbl/day
Average Injection Rate
Delta_t
day
Injection Days in Period
Source and review
reviewedHarmony Enterprise Hall plot theory, cumulative volume of water injected on the Hall plot x-axis.
Source