Formation compressibility by using hydrofrac data

Input(s)

Vs: Volume Associated to Conduct a Hydrofrac (bbl)

$\mathrm{dVs}$: Change in Volume (bbl)

$\mathrm{dP}$: Change in Pressure (psi)

Output(s)

$\beta$: Formation Compressibility (psi)

Formula(s)

$$ \beta=\frac{1}{\mathrm{Vs}} *\left(\frac{\mathrm{dVs}}{\mathrm{dP}}\right) $$

Reference(s)

Mark D. Zoback, Reservoir Geomechanics, Cambridge University Press, UK, Page: 221.