Saturation Height Function
In the
oil and gas industry the description of the hydrocarbon volume is one of the key
disciplines. The hydrocarbons initially in-place (HCIIP) are defined as:
HCIIP = Gross Rock Volume x Net-to-Gross x
Porosity x Hydrocarbon saturation
There are
different methods to calculate the HCIIP from simple calculations of using
average values to complex geomodels which take account geological trends and
account for the capillary forces in the hydrocarbon column.
Over the
years different methods were developed to describe the changing water saturation
in the reservoir with height above the free water level and also taking the
reservoir quality into account.
Today
some of the most common approaches are:
·
Leverett
– J
–
Function
·
Brooks –
Corey
·
Skelt –
Harrison
·
Cuddy
·
Thomeer
The SPE
paper 71326 compares some of the named approaches on a field example.
For more information: