# Saturated Water Isothermal Compressibility Coefficient (C_{w,s})

The compressibility (also known as the coefficient of compressibility or isothermal compressibility is a measure of the relative volume change of a fluid or solid as a response to the application of pressure. The compressibility of water is a function of pressure and temperature.

At pressures below bubble point, the brine compressibility is a function of water and gas formation volume factors as well as solution gas/water ratio.

The Properties of Petroleum Fluids, McCain

### Correlations

- 1-Meehan
- 2-McCain

### Input Parameters

Name | Input Value - Unit | Converted Value | Validity | Link to Calculation Page | |||
---|---|---|---|---|---|---|---|

Temperature | 165 | °f | |||||

Pressure | 3500 | psi | |||||

Salinity (NaCl equivalent) Water salinity in parts per million of mass (ppm _{m}) | 68000 | ppm | |||||

Solution gas/water ratio | 11.42 | SCF/STB | Solution Gas-Water Ratio (R_{sw}) | ||||

Gas Formation Volume Factor | 0.00092 | bbl/scf | |||||

Water Formation Volume Factor | 1.023 | bbl/STB | |||||

CALCULATE | |||||||

## Results | |||||||

Correlation | Calculated Value | Warnings | Remarks | ||||

1-Meehan | 0.000002801 | 1/psi | |||||

2-McCain | 0.000002642 | 1/psi |