Stone Energy: Partners Evaluating Devt Options for Pyrenees

Stone Energy has announced operational updates for the following activities:

Appalachian Basin (Marcellus Shale Play)

In the third and fourth quarters of 2009, Stone drilled six operated vertical wells in the Marcellus Shale Play; four in West Virginia and two in Pennsylvania. Four of these wells were completed and established the viability of the play on Stone's acreage. Each of the four wells tested at an initial rate between 0.5 and 2.0 million cubic feet of gas per day (MMcf/d). The other two wells will be completed when weather conditions allow. Stone's working interest is 100% in four of the six wells and is 70% in the other two wells. Additionally, Stone participated with a minority working interest (20%) in the drilling of two horizontal wells in West Virginia during the same period. These two wells are the first in a four-well program which should conclude in early 2010, at which time all the wells will be completed. Also in West Virginia, three previously drilled vertical wells (not operated by Stone) were completed with initial test rates of 0.5 - 1.5 MMcf/d. Stone's working interest is 50% in these three wells. With the prospectivity of the Stone-operated acreage validated by the 2009 vertical drilling program, Stone will enter the horizontal drilling phase in 2010. Stone plans to participate in the drilling and completion of 12-15 horizontal wells this year.

Mississippi Canyon Block 109 (Amberjack Field)

In December, Stone mobilized the HP 206 Platform Rig to its 100% owned Amberjack Field. The Company initially performed a recompletion project to a shallower zone in the existing Amberjack A-25 well which is currently producing at a rate of over 500 barrels equivalents per day. The rig will now be used to drill four exploitation wells targeting oil reservoirs and incremental reserves. If successful, production from each well would be tied in almost immediately after completion.

Vermilion Block 96 (Cardinal/Blue Jay; 100% W.I.)

Stone recently drilled two GOM shelf exploitation wells in VR 96. The Cardinal well encountered 57 feet of gas in four pay zones, while the Blue Jay well encountered four hydrocarbon zones but was deemed non-commercial. Construction for the facilities and pipeline for Cardinal has commenced, with first production expected in the second quarter 2010.

Garden Banks 293 (Pyrenees; 15% W.I.)

Stone and its partners are reviewing different development options for the Pyrenees discovery. Current plans call for first production by early 2012.

Hurricane Risk Mitigation Program

The targeted decommissioning and well abandonment of higher risk platform facilities has been substantially completed. Approximately $65 million was spent in 2009 on our proactive risk mitigation program, previous hurricane abandonment and normal P&A work. For 2009, 157 idle wellbores were plugged and eight platforms were abandoned.


Volumes for the fourth quarter of 2009 are expected to be approximately 220 million cubic feet of gas equivalent (MMcfe) per day, slightly under the previous guidance of 225-235 MMcfe per day provided in November 2009. The shortfall is due to the unplanned shut-in from Hurricane Ida, a delay in the repair of two third party gas pipelines (which are expected to be operational in late January), and greater than normal weather restrictions in December which delayed recompletion projects. Additionally, production from the Amberjack platform was down periodically during the fourth quarter due to the installation of the platform rig. Stone still expects full year 2009 average daily production to be in the range of its previous annual guidance of 210-220 MMcfe per day. The 2009 exit rate was approximately 215-220 MMcfe per day, with an approximate 50/50 split between oil and gas.


Stone's 2009 year-end estimated proved, probable and possible reserves are currently being engineered by Netherland Sewell & Associates (NSAI) with the final report expected during January. Estimated proved reserves will decline from year-end 2008 levels due to production, negative commodity pricing revisions and other negative revisions to comply with the new SEC rules. In 2009, the company focused on debt reduction, conversion of non-producing reserves to producing reserves to generate cashflow, and hurricane risk mitigation expenditures. Accordingly, drilling additions to estimated proved reserves will be minimal in 2009 and will not offset reductions. Stone has been preliminarily advised by NSAI that Stone's 2009 estimated proved reserves will be approximately 410 billion cubic feet equivalents, with approximately 80% being proved developed reserves.


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