Correlation between pore compressibility
at a given pressure
and
initial pore compressibility at
initial formation pressure :
| Correlation | Name/Author | Scope |
|---|
| LaTeX Math Block |
|---|
| anchor | Dobrynin |
|---|
| alignment | left |
|---|
| \displaystyle c_r(p) = c_{ri} \cdot \frac{ \ln \left( \frac{ p_n }{p_{\rm max}} \right) }{ \ln \left( \frac{p_{ni}}{p_{\rm max}} \right) } |
| LaTeX Math Block |
|---|
| p_n = p_{\rm min} + 1.75 \cdot \phi^{0.51} \cdot (p_{\rm max} - p) |
| LaTeX Math Block |
|---|
| p_{ni} = p_{\rm min} + 1.75 \cdot \phi^{0.51} \cdot (p_{\rm max} - p_i) |
|
Dobrynin | Wide pressure range: pmin = 1 MPa < p < pmax = 200 MPa
|
In many practical cases the pore compressibility can be considered as poorly dependent on reservoir pressure variation.
But in case the reservoir pressure is changing substantially one may need to account for the effect it takes on pore compressibility which can be fairly approximated by Dobrynin correlation
| LaTeX Math Block Reference |
|---|
|
.
See also
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petrophysics / Geomechanical Rock Modelling / Pore compressibility
