Production EngineeringHydraulic Fracturing

Mass of Rock Dissolved per Unit Mass of Acid - Acidizing Formula

\beta=\frac{M_{wm}A}{M_{wa}B}

Mass of Rock Dissolved per Unit Mass of Acid - Acidizing calculates mass of rock dissolved per unit mass of acid for hydraulic fracturing workflows in production engineering.

Calculate

How engineers use this formula

Use this formula when the listed inputs (M_wm, A_stoich, M_wa, B_stoich) are known and the assumptions behind the cited hydraulic fracturing 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, beta equals 1.3726 g/g.

M_wmg/mol

100.09

A_stoichdimensionless

M_wag/mol

36.46

B_stoichdimensionless

Inputs

M_wm

g/mol

Molecular Weight of Mineral Rock

A_stoich

dimensionless

Stoichiometric Coefficient of Mineral Rock

M_wa

g/mol

Molecular Weight of Acid

B_stoich

dimensionless

Stoichiometric Coefficient of Acid

Outputs

beta

g/g

Mass of Rock Dissolved per Unit Mass of Acid

M_wm

g/mol

Molecular Weight of Mineral Rock

M_wa

g/mol

Molecular Weight of Acid

Source and review

reviewed

Williams, B.B., Gidley, J.L. and Schechter, R.S. 1979. Acidizing Fundamentals. Henry L. Doherty Memorial Fund of AIME, Society of Petroleum Engineers of AIME, Page 13.

Source