Reservoir EngineeringUnconventional Reservoirs
Coal Mass from Area Thickness and Bulk Density Formula
Coal Mass from Area Thickness and Bulk Density calculates coal mass for unconventional reservoirs workflows in reservoir engineering.
How engineers use this formula
Use this formula when the listed inputs (A, h, rho_b) are known and the assumptions behind the cited unconventional reservoirs 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, M_c equals 24,365,824 short ton.
Aacres
640
hft
20
rho_bg/cc
1.4
Inputs
A
acresCoalbed Area
h
ftCoal Seam Thickness
rho_b
g/ccCoal Bulk Density
Outputs
M_c
short ton
Coal Mass
A
acres
Coalbed Area
h
ft
Coal Seam Thickness
rho_b
g/cc
Coal Bulk Density
Source and review
reviewedAhmed, T., McKinney, P.D. Advanced Reservoir Engineering, Gulf Publishing House, Burlington, MA, 2015.
Source