May. 2013 - W&T Offshore is in the process of drilling a sidetrack to the A-2 well in Mississippi Canyon 243. The well is being drilled to replace a well that sanded-up in 4Q 2012. The company plans to drill the A-5 injection well later in 2013 to extend the productive life of the field and sweep oil to the A-2 well bore. If A-5 is successful, W&T may consider undertaking a similar project in the western part of the field.

Aug. 2012 - W&T Offshore reported that the A-4 ST at the Matterhorn field began producing approximately 3,190 boepd net in mid-June and the A-13 at Mahogany began producing approximately 1,640 boepd net in late May. During the second quarter, the company commenced drilling the A-5 ST well at Mahogany, and is now currently completing the well. W&T expects to bring the A-5 ST online later this week with projected initial production rates of approximately 925 boepd net to the company. Following the A-5 ST well at Mahogany, the company expects to drill the A-9 ST development well to further develop the P sand south of the A-5 ST during the third quarter. Following the A-9 ST well, W&T anticipates moving to another development drill well for a possible spud date in the fourth quarter followed by completion in early 2013.

Mar. 2011 - W&T Offshore has responded to reports of an oil sheen in the Gulf of Mexico that was rumored to be near its Matterhorn platform in Mississippi Canyon Block 243. Following an onsite and aerial investigation, it was determined that the source of the oil sheen was not the Matterhorn platform or any other nearby W&T operated facilities, stated W&T. The Matterhorn field is located in 2,789 feet (850 meters) of water.

Mar. 2011 - InterMoor has installed two subsea trees at the Mandy field, located on Mississippi Canyon Block 199 in a water depth of 2,460 feet (750 meters). The trees, weighing 45 tons each, were installed on the two existing well locations. LLOG operates the Mandy discovery holding a 50% interest; Mariner Energy holds 35%; and Apache holds the remaining 15% interest.

Mar. 2011 - LLOG will commence drilling on its Mandy field, located on Mississippi Canyon Block 199 in the Gulf of Mexico, using the Noble Amos Runner semisub. The rig will complete two wells, which will be tied-back to the Matterhorn TLP. LLOG operates the Mandy discovery holding a 50% interest; Mariner Energy holds 35%; and Apache holds the remaining 15% interest.

Apr. 2010 - Total E&P USA transferred its interests in three offshore lease blocks in the Gulf of Mexico to W&T Offshore. W&T Offshore will acquire Total's 64% interest in Viosca Knoll Blocks 822 and 823, housing the Virgo field, and 100% interest in Mississippi Canyon Block 243, holding the Matterhorn field. The Virgo gas field is located in 1,132 feet of water (345 meters) and commenced production in 1999. At year-end 2009, Virgo reached an average production of roughly 2,000 boed. The Matterhorn field, located in 2,789 feet (850 meters) of water, was discovered in 1999, sanctioned in July 2001 and came into production in November 2003. The field has produced an average rate of 5,000 boed at year-end 2009.

Mar. 2010 - LLOG Exploration confirmed a discovery was made at its Mandy prospect in Mississippi Canyon Block 199 in the Gulf of Mexico. Drilled by the Noble Lorris Bouzigard semisub in 2,465 feet (751 meters) of water, the discovery well was drilled to a total vertical depth of roughly 7,500 feet (2,286 meters). The well encountered 120 feet (37 meters) of net oil pay, which was confirmed by RCI pressures and samples, in a highly quality reservoir. A second well was drilled on Mandy in a separate fault block and also found a high quality oil-filled reservoir with more than 100 feet (30 meters) of net oil pay. LLOG operates the discovery holding a 50% interest; Mariner Energy holds 35%; and Apache holds the remaining 15% interest.

Sep. 2009 - LLOG has filed a supplemental EP, to add an existing well to Lease OCS-G-32301, Mississippi Canyon block 199, its Mandy prospect. LLOG proposes to re-enter and complete the existing MC 199 Well No. 001, Lease OCS-G-18199, which was previously drilled and temporarily abandoned by Total E&P in December 2000. LLOG is the operator of Mandy and holds a 50% interest while, Mariner Energy holds the remaining 50%.

Jul. 2009 - Technip was awarded a repair and installation contract by Total for a gas export pipeline for the Matterhorn field. Matterhorn is located on Mississippi Canyon Block 243 in 2,810 feet (856 meters) of water, approximately 100 miles (161 kilometers) southwest of New Orleans, Louisiana. The scope of work of this contract is to re-route an existing 10-inch-diameter pipeline leaving the Matterhorn platform to tie into an existing 12-inch trunkline in Mississippi Canyon Block 108. Technip's operating center in Houston, Texas will execute this contract. The flowline will be welded in Technip's spoolbase located in Mobile, Alabama.

Feb. 2009 - LLOG has submitted an Initial Exploation Plan to the MMS for approval of operations on the Mandy prospect. The Mandy prospect is located at Mississippi Canyon Block 199. The plan includes Drilling and testing well locations A, B & C. Tentative start date for these operations is April 1, 2009.