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| WORLDWIDE      PETROLEUM CONSULTANTSENGINEERING      ●      GEOLOGY ●GEOPHYSICS      ●      PETROPHYSICS |   | Chairman      & CEOC.H.      (Scott) Rees IIIPresident      & COODanny      D. SimmonsExecutive      VPG.      Lance Binder |   | Executive      CommitteeP.      Scott Frost –      DallasJ.      Carter Henson, Jr. –      HoustonDan      Paul Smith –      DallasJoseph      J. Spellman –      DallasThomas      J. Tella II - Dallas |
|---------------------------------------------------------------------------------------------------------------------------------|--------|-------------------------------------------------------------------------------------------------------------------------------------|--------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|                                |   | Net Reserves |     |   | Future Net Revenue (MS) |   |
|-------------------------------------|--------|--------------|----------|--------|-------------------------|--------|
|                                |   | Oil          |     |   | NGL                     |   |   | Gas |   |   |   |   |   | Present      Worth |   |
| Category                            |   | (MBBL)       |     |   | (MBBL)                  |   |   | (MMCF) |   |   | Total |   |   | at 10% |   |
| Proved      Developed Producing     |   |         | 42,382.3 |   |                    |   | 2,092.5 |   |   |   | 697.9 |   |   |   | 1,267,830.7 |   |   |   | 963,497.3 |   |
| Proved      Developed Non-Producing |   |         | 4,675.9  |   |                    |   | 572.0 |   |   |   | 0.0 |   |   |   | 111,126.0 |   |   |   | 90,975.8 |   |
| Proved      Undeveloped             |   |         | 33,785.8 |   |                    |   | 3,255.2 |   |   |   | 0.0 |   |   |   | 387,829.3 |   |   |   | 208,820.9 |   |
|                                |   |         |     |   |                    |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Total      Proved                   |   |         | 80,844.0 |   |                    |   | 5,919.7 |   |   |   | 697.9 |   |   |   | 1,766,786.0 |   |   |   | 1,263,294.0 |   |

| 4500      Thanksgiving Tower ▪      1601 Elm Street ▪ Dallas, Texas 75201-4754 ▪ Ph:      214-969-5401 ▪ Fax: 214-969-5411 |   | nsai@nsai-petro.com  |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|----------------------|
| 1221      Lamar Street, Suite 1200 ▪ Houston, Texas 77010-3072 ▪ Ph:      713-654-4950 ▪ Fax: 713-654-4951                            |   | netherlandsewell.com |

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|   | Sincerely,                                      |
|--------|-------------------------------------------------|
|   | NETHERLAND,      SEWELL & ASSOCIATES, INC.  |
|   | Texas      Registered Engineering Firm F-002699 |
|   |                                            |   |
|   |                                            | /s/      C.H. (Scott) Rees III |
|   | By:                                             |   |
|   |                                            | C.H.      (Scott) Rees III, P.E. |
|   |                                            | Chairman      and Chief Executive Officer |

|                                | /s/      Derek F. Newton                             |   | /s/      Mike K. Norton                                 |
|-------------------------------------|------------------------------------------------------|--------|---------------------------------------------------------|
| By:                                 |                                                 | By:    |                                                    |
|                                | Derek      F. Newton, P.E. 97689 Vice      President |   | Mike      K. Norton, P.G.441 Senior      Vice President |
|                                |                                                 |   |                                                    |
| Date      Signed: December 31, 2009 | Date      Signed: December 31, 2009                  |

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