Exhibit 23.4
CAWLEY, GILLESPIE & ASSOCIATES, INC.
PETROLEUM CONSULTANTS
| 13640 BRIARWICK DRIVE, SUITE 100 | 306 WEST SEVENTH STREET, SUITE 302 | 1000 LOUISIANA STREET, SUITE 1900 | ||||||
| AUSTIN, TEXAS 78729-1707 | FORT WORTH, TEXAS 76102-4987 | HOUSTON, TEXAS 77002-5008 | ||||||
| 512-249-7000 | 817- 336-2461 | 713-651-9944 | ||||||
CONSENT OF INDEPENDENT PETROLEUM ENGINEERS
As independent petroleum engineers, we hereby consent to the inclusion of information included or incorporated by reference in this Registration Statement on Form S-3 of Earthstone Energy, Inc. with respect to the information from our firm’s reserve report dated January 15, 2021, included in the Annual Report on Form 10-K of Earthstone Energy, Inc. for the year ended December 31, 2020, filed with the SEC on March 10, 2021, as well as in the notes to the financial statements included therein, in reliance upon the report of this firm and upon the authority of this firm as experts in petroleum engineering. We hereby further consent to the reference to this firm under the heading “Experts” in such Registration Statement.
| Sincerely, |  | ||||
/s/ W. Todd Brooker | |||||
| W. Todd Brooker, P.E. President Cawley, Gillespie & Associates, Inc. | |||||
| Texas Registered Engineering Firm F-693 | |||||
| August 4, 2021 | |||||