Steam Zone Reservoir Volume from Injected Heat Formula
Steam Zone Reservoir Volume from Injected Heat calculates gross volume of steam in reservoir for waterflooding and eor workflows in reservoir engineering.
How engineers use this formula
Use this formula when the listed inputs (Q_i, t, E_hs, T_i, T_a) 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, V_s equals 9.241131 acre-ft.
374902320
30
0.6
500
60
Inputs
Q_i
BTU/dayHeat injection rate
t
dayInjection time
E_hs
fractionThermal efficiency of steam zone
T_i
degFInjection temperature
T_a
degFAmbient temperature
Outputs
V_s
Gross volume of steam in reservoir
Q_i
Heat injection rate
t
Injection time
E_hs
Thermal efficiency of steam zone
T_i
Injection temperature
T_a
Ambient temperature
Source and review
reviewedPrats, M. 1986. Thermal Recovery Monograph Vol. 7. Society of Petroleum Engineers, Page 76.
Source