Other Properties

Williston Basin, North Dakota
On March 28, 2006, we spudded the Gruman 18-3 well intended to be either an increased density well if it proved to be up dip of the Gruman 18-1 producing well or a water injection well if it was down dip. The well reached total depth of 9,890 feet on April 14, 2006, and was completed as an injection well.

On February 1, 2007, we began injecting produced water into the Gruman 18-3 well. The result has been to reduce the cost of operating the Gruman 18-1 by eliminating the need to truck produced water to a disposal facility. We are considering supplementing this injection with water from the Dakota for pressure maintenance in the mound. We have established that the Gruman 18-3 is in pressure communication with the Gruman 18-1. Further testing or stimulation may be necessary to achieve the desired future injection rates. Proved developed reserves in the prospect to our share of the well as of December 31, 2007, were 215 Mbo and 68 MMcf of natural gas, as estimated by a third party engineering firm, McCartney Engineering, LLC.