Changes

: <math>\text{Depth WOC or Depth GWC} = D_{FWL} - \frac{P_ct}{0.433(\rho_w - \rho_{hc})}</math>

: <math>\text{Depth WOC or Depth GWC} = D_{FWL} - \frac{P_ct}{0.433(\rho_w - \rho_{hc})}</math>

===<big>Compressibility</big><big></big>===

===Compressibility===

   

   

Isothermal compressibility is defined as the relative volume changes due to changes in system pressure at fixed temperature.

Isothermal compressibility is defined as the relative volume changes due to changes in system pressure at fixed temperature.

[[File:Formula7.png|200px|thumbnail|center]]

: <math>C = \frac{1}{V} \left ( \frac{\Delta V}{\Delta P} \right )_T (psi^{-1}) </math>

Calculate compressibility rock cores in data analysis, it can be used Newman empirical equation:

Calculate compressibility rock cores in data analysis, it can be used Newman empirical equation:

Compressibility Sandstone:

Compressibility Sandstone:

[[File:Formula sandstones.png|200px|thumbnail|center]]

[[File:Formula sandstones.png|200px|thumbnail|center]]

For hydrocarbon reservoir compressibility can be express by:

For hydrocarbon reservoir compressibility can be express by:

<math>\text{C}_\text{t} = \text{S}_\text{o} \text{C}_\text{o} + \text{S}_\text{g} \text{C}_\text{g} + \text{S}_\text{w} \text{C}_\text{w} + \text{C}_\text{f}</math>

<math>\text{C}_\text{t} = \text{S}_\text{o} \text{C}_\text{o} + \text{S}_\text{g} \text{C}_\text{g} + \text{S}_\text{w} \text{C}_\text{w} + \text{C}_\text{f}</math>

==Physical Properties of Gas==

==Physical Properties of Gas==