KOSMOS ENERGY LTD. Notes to Consolidated Financial Statements (Continued) 15. Commitments and Contingencies From time to time, we are involved in litigation, regulatory examinations and administrative proceedings primarily arising in the ordinary course of our business in jurisdictions in which we do business. Although the outcome of these matters cannot be predicted with certainty, management believes none of these matters, either individually or in the aggregate, would have a material effect upon the Company’s financial position; however, an unfavorable outcome could have a material adverse effect on our results from operations for a specific interim period or year. The Jubilee Field in Ghana covers an area within both the WCTP and DT petroleum contract areas. It was agreed the Jubilee Field would be unitized for optimal resource recovery. Kosmos and its partners executed a comprehensive unitization and unit operating agreement, the Jubilee UUOA, to unitize the Jubilee Field and govern each party’s respective rights and duties in the Jubilee Unit, which was effective July 16, 2009. Pursuant to the terms of the Jubilee UUOA, the tract participations are subject to a process of redetermination. The initial redetermination process was completed on October 14, 2011. As a result of the initial redetermination process, our Unit Interest is 24.1%. These consolidated financial statements are based on these re determined tract participations. Our unit interest may change in the future should another redetermination occur. The Company leases facilities under various operating leases that expire through 2027, including our office space. Rent expense under these agreements, was $3.3 million, $3.3 million and $4.7 million for the years ended December 31, 2017, 2016 and 2015, respectively. We currently have a commitment to drill one exploration well in Mauritania. In Mauritania, our partner is obligated to fund our share of the cost of the exploration well, subject to their maximum $228 million cumulative exploration and appraisal carry covering both our Mauritania and Senegal blocks. In Equatorial Guinea, Mauritania and Cote d’Ivoire, we have 3D seismic requirements of approximately 6,000 square kilometers, 7,600 square kilometers and 12,000 square kilometers, respectively. The Equatorial Guinea exploration block commitments are subject to ratification by the President of Equatorial Guinea. In November 2017, we entered into a one well drilling rig contract for the ENSCO DS-12 plus six well options. We have completed the initial well and have exercised one of the six option wells to be drilled in 2018. Future minimum rental commitments under our leases at December 31, 2017, are as follows: Payments Due By Year(1) Total 2018 2019 2020 2021 2022 Thereafter (In thousands) Operating leases(2) . . . . . . . . . . . . . . . . . $12,626 $4,981 $4,370 $484 $419 $418 $1,954 (1) Does not include purchase commitments for jointly owned fields and facilities where we are not the operator and excludes commitments for exploration activities, including well commitments, in our petroleum contracts. (2) Primarily relates to corporate office and foreign office leases. 146