ERHC Energy Inc (ERHE)

[bayfisherii]

Pete,

It is not just logs that these estimates are calculated from.

Generally to determine the viability of a field the exploration company will drill minimally 2 to as many as 4 wells at each well they will run a flow test (how much oil is produced in a 24 hour period with a certain choke), then they shut the well in with a pressure monitor sitting at the perforations and run what is called a BHP (bottom Hole pressure build-up) from this information and more they can predict the potential reserves in a given formation. WHile not always exact the predictions should not vary much between different different engineer/geophysicist groups.

Bay