Cobalt says evaluation results are encouraging in Shenandoah well Cobalt provided an update regarding its Shenandoah #2R appraisal well, located in Walker Ridge Block 51 in the deepwater Gulf of Mexico. While evaluation operations are still ongoing in this well, wireline evaluation results received thus far are very encouraging. The Shenandoah #2R appraisal well was drilled as a straight hole to a total depth of 31,400 feet in approximately 5,800 feet of water, about 1.3 miles southwest of the Shenandoah #1 discovery well. The Shenandoah #1 discovery well was drilled in early 2009 on Walker Ridge Block 52 and encountered nearly 300 net feet of Inboard Lower Tertiary oil pay. Cobalt holds a 20% working interest in Shenandoah.