Q – How long are the trust’s distributions expected to last?

A – The net profits interest will terminate on the later to occur of (1) December 31, 2021, or (2) the time when 11.79 million barrels of oil equivalent (the oil and gas reserves attributable to the trust) have been produced from the underlying properties and sold.

Q – What will be the value of the units when the trust terminates?

A – Zero. There will be a final cash distribution to unitowners, and the properties associated with the trust will revert back to Whiting Petroleum Corporation.

Q – What percentage of the trust’s reserves is oil versus natural gas?

A – Based on year-end 2011 independent engineering, approximately 78% of the trust’s reserves were oil and natural gas liquids and 22% were natural gas.

Q – To determine the yield from the trust’s distributions, does one take the total annual distributions and divide by the purchase price?

A – The distributions include return of capital so they should not be treated as dividends. The estimated internal rate of return on the trust based on the initial offering price of $20 per unit is approximately 9.00%.

Q – For tax reporting purposes, does the trust issue a K-1?

A – No. A tax guide will be sent to unitowners in January of each year. Typically, the tax information for the trust can be reported on a 1099.

Q – Who should I contact if I have questions about the trust?

A – Please contact the trustee: Mike Ulrich of The Bank of New York Mellon Trust Company at 512.236.6599.