| Schedule of Costs Incurred and Payable with Related Parties |
The following table summarizes the costs incurred for such services which were either included as part of oil and natural gas properties in the Consolidated Balance Sheet or as lease operating expense in the Consolidated Statements of Operations, as well as the related payables outstanding as of the balance sheet dates: | | | | | | | | | | | | | | | | | | | | For the Three Months Ended June 30, | | For the Six Months Ended June 30, | (in thousands) | | 2018 | | 2017 | | 2018 | | 2017 | Costs of goods/services provided | | | | | | | | | Liberty Oilfield Services, LLC(1) | | $ | — |
| | $ | 27,675 |
| | $ | — |
| | $ | 40,182 |
| Permian Tank and Manufacturing, Inc.(1) | | 1,780 |
| | 1,308 |
| | 3,767 |
| | 2,365 |
| Oil States International, Inc.(2) | | 2,106 |
| | 3,236 |
| | 4,401 |
| | 3,932 |
|
| | | | | | | | | (in thousands) | June 30, 2018 | | December 31, 2017 | Accounts payable and accrued expenses | | | | Permian Tank and Manufacturing, Inc.(1) | $ | 1,816 |
| | $ | 340 |
| Oil States International, Inc.(2) | 598 |
| | 1,518 |
|
| | (1) | These entities are Riverstone affiliates. Riverstone and its affiliates, beneficially own more than 10% equity interest in the Company and are therefore considered related parties. |
| | (2) | Mark G. Papa, the Company’s President, Chief Executive Officer and Chairman of the Board, serves as a director and Chairman of the Board of Oil States International, Inc., an energy services company publicly traded on the New York Stock Exchange (“Oil States”). |
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