| | The reported securities are held as follows: • 1,039,611 shares held of record by, or for the benefit of, WP E&P XI A, • 79,937 shares held of record by, or for the benefit of, WP XI E&P Partners A, • 1,012,822 shares held of record by, or for the benefit of, WP IRH Holdings, • 28,086 shares held of record by, or for the benefit of, WP XI E&P Partners B IRH, • 1,556,826 shares held of record by, or for the benefit of, WPE IRH Holdings, • 127,467 shares held of record by, or for the benefit of, WPE Partners IRH Holdings • 49,690 shares held of record by, or for the benefit of, WPE E&P Partners B IRH, • 256,498 shares held of record by, or for the benefit of, WPE E&P Partners A, • 4,246,874 shares held of record by, or for the benefit of, WPE E&P A, • 1,153,322 shares held of record by, or for the benefit of, WPE Chisholm Holdings, • 94,429 shares held of record by, or for the benefit of, WPEP Chisholm Holdings, • 36,812 shares held of record by, or for the benefit of, WPE E&P Partners B Chisholm, • 1,169,806 shares held of record by, or for the benefit of, WP PE E&P XII, • 1,668,972 shares held of record by, or for the benefit of, WP XII Chisholm Holdings, • 18,310 shares held of record by, or for the benefit of, WP XII E&P Partners 2 Chisholm, • 28,073 shares held of record by, or for the benefit of, WP PE E&P XII D, • 42,477 shares held of record by, or for the benefit of, WP PE E&P XII E, • 76,504 shares held of record by, or for the benefit of, WP XII E&P Partners A • 196,861 shares held of record by, or for the benefit of, WP XII E&P Partners 1 Because of the relationships among and control with respect to the Reporting Persons as described in Item 2(a) hereof, each such Reporting Person may be deemed to have voting or dispositive power over Shares beneficially owned directly or indirectly by entities for which such Reporting Person serves as a managing member, general partner or registered investment adviser. The filing of this Statement shall not be construed as an admission that the Reporting Persons or any of the aforementioned entities is, for the purpose of Section 13(d) or 13(g) of the Exchange Act, the beneficial owner of any securities covered by this Statement. |