Exhibit 23.3
CONSENT OF INDEPENDENT PETROLEUM ENGINEERS AND GEOLOGISTS
We consent to the incorporation by reference in the Post-Effective Amendment No. 1 on Form S-3 to Form S-1 Registration Statement and related Prospectus of Ultra Petroleum Corp. (the “Company”) of our report dated February 16, 2018, of the “Estimates of Reserves and Future Revenue to the Ultra Petroleum Corp. Interest in Certain Oil and Gas Properties located in Utah and Wyoming as of December 31, 2017” included in or made a part of the Annual Report on Form 10-K of the Company for the year ended December 31, 2017. We also consent to the reference to us under the heading “Experts” in such Registration Statement.
| NETHERLAND, SEWELL & ASSOCIATES, INC. | ||
| By: | /s/ C.H. (Scott) Rees III | |
| C.H. (Scott) Rees III, P.E. | ||
| Chairman and Chief Executive Officer | ||
Dallas, Texas
March 7, 2018