Exhibit 99.1
JOINT FILING AGREEMENT
In accordancewith Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a statement on Schedule 13G (including amendments thereto) with respect to the common stock, par value $0.01 per share, of OASIS PETROLEUM INC., a Delaware corporation, and further agree that this Joint Filing Agreement be included as an exhibit to such joint filings. In evidence thereof, each of the undersigned hereby executes this Joint Filing Agreement as of June 18, 2018.
| FORGE ENERGY, LLC | ||
| By: | /s/ Barry J. Winstead | |
| Name: | Barry J. Winstead | |
| Title: | President & CEO | |
| ENCAP ENERGY CAPITAL FUND VIII, L.P. | ||
| By: | EnCap Equity Fund VIII GP, L.P., | |
| its general partner | ||
| By: | EnCap Investments L.P., | |
| its general partner | ||
| By: | EnCap Investments GP, L.L.C., | |
| its general partner | ||
| By: | /s/ D. Martin Phillips | |
| Name: | D. Martin Phillips | |
| Title: | Senior Managing Director | |
| ENCAP ENERGY CAPITAL FUND VIIICO-INVESTORS, L.P. | ||
| By: | EnCap Equity Fund VIII GP, L.P., | |
| its general partner | ||
| By: | EnCap Investments L.P., | |
| its general partner | ||
| By: | EnCap Investments GP, L.L.C., | |
| its general partner | ||
| By: | /s/ D. Martin Phillips | |
| Name: | D. Martin Phillips | |
| Title: | Senior Managing Director | |
| ENCAP PARTNERS GP, LLC | ||
| By: | /s/ D. Martin Phillips | |
| Name: | D. Martin Phillips | |
| Title: | Managing Partner | |
