Resolute Energy reports full year 2009 production and year end proved reserves and PV-10.

Reserves and Analysis1 In accordance with Securities and Exchange Commission requirements for reporting oil and gas reserves, Resolute's total proved oil and gas reserves on December 31, 2009 were 64.4 million barrels of oil equivalent ("MMBoe"), an increase of 31% as compared to year-end 2008. Total 2009 proved reserves consist of 58.1 million barrels ("MMBbl") of crude oil and natural gas liquids ("NGL") and 38.2 billion cubic feet ("Bcf") of gas. At year-end 2009, 54% of reserves were proved developed. Oil constituted 77% of total proved reserves, and oil and NGL together constituted 90% of Resolute's proved reserves. The pre tax present value of proved reserves, discounted at 10% pursuant to SEC reporting rules, or PV-10, was $480 million.

New SEC reporting rules require that year-end proved reserve volumes be calculated using the 12-month unweighted arithmetic average of the first-day-of-the-month price for the period January through December 2009. On this basis, the prices for oil and gas for 2009 reserves reporting purposes utilized an average NYMEX oil price of $61.18 per barrel of oil and an average 2009 Henry Hub gas price of $3.87 per MMBtu of gas.

Proved reserves attributable to the Company's Utah assets, which are located in the Company's Aneth Field properties, totaled approximately 59.6 MMBoe on December 31, 2009, an increase of 36% over the comparable 2008 amount. Oil and NGL together constitute more than 93% of Resolute's proved Utah reserves. Proved reserves attributable to the Company’s Wyoming properties totaled 4.8 MMBoe on December 31, 2009, compared to the December 31, 2008 total of approximately 5.4 MMBoe. Wyoming reserves are comprised of approximately one-half gas and one-half oil and NGL.

Alternate Pricing Scenarios In addition to evaluating its reserves utilizing the SEC reporting rules, two other cases were evaluated by management. In one case, Resolute utilized the futures price strip that was in effect at December 31, 2009 (the "Strip Case") to evaluate its reserves. Resolute’s total proved Strip Case oil and gas reserves on December 31, 2009 were 82.9 MMBoe. Under this case, total 2009 proved reserves consist of 75.5 MMBbl of crude oil and NGL and 44.1 Bcf of gas, with a PV-10 of $1,067 million. Pricing used to calculate Strip Case proved reserves for year end 2009 include NYMEX front-month oil prices of $82.30, $86.13, $87.99 and $89.53 per Bbl for each of the four years from 2010 through 2013. Prices were held constant thereafter at $91.30 per Bbl for 2014 and thereafter. Similarly, gas prices used were $5.77, $6.31, $6.48, and $6.62 per MMBtu for the four year period, and $6.80 per MMBtu for 2014 and thereafter. Capital and operating costs were escalated by 3% per year through 2014 and held constant thereafter.

Resolute also evaluated its 2009 reserves utilizing the SEC guidelines that were in effect at December 31, 2008 (the "Flat Case"). In the Flat Case, December 31, 2009 oil prices of $79.36 per Bbl and gas prices of $5.79 per MMBtu were used per prior SEC guidelines instead of the twelve month average prices as used pursuant to current SEC guidelines as described above. Resolute’s total proved Flat Case oil and gas reserves on December 31, 2009 were 70.1 MMBoe. Under the Flat Case, total 2009 proved reserves consist of 62.8 MMBbl of crude oil and NGL and 43.5 Bcf of gas. PV-10 for the Flat Case was $885 million.

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