Approximation of Material Balance Pressure @model for slightly compressibility flow:

p(t)  = p_i + \frac{\Delta Q(t)}{V_e \cdot c_t}

where

initial drainage volume of the main pay (excluding the aquifer and gas cap)

initial porosity

total compressibility

pore compressibility 

initial water saturation

initial gas saturation

initial oil saturation:

fluid compressibility of water phaseoil phase and gas phase

See Also


Petroleum Industry / Upstream /  Production / Subsurface Production / Field Study & Modelling / Production Analysis / Material Balance Analysis (MatBal) / Material Balance Pressure @model

[ Derivation of Slightly compressible Material Balance Pressure @model ]