On 4 May 2020, Repsol SA announced two oil and gas discoveries: Polok 1EXP and Chinwol 1EXP, both new field wildcats located in the CNH-R02-L04-AP-CS-G10/2018 Contract, Area 29 Block, offshore Campeche Deep Sea Basin on water depth of 583 m and 464 m respectively, drilled by the "Maersk Valiant" D/S. Repsol is operator of the contract with 30% working interest, PC Carigali holds 28.33%, Sierra Nevada holds 25%, and PTTEP holds 16.67%, working interest.  The Polok 1EXP NFW well reached the total depth (TD) of 2,620 m encountered about 200 m of oil pay, assumed in the Lower Miocene section. The trap is represented by three-way closed salt flank trap with a seismic flat spot with estimated prospective resources of 193 MMboe with a geologic chance of success of 25.3%.  The Chinwol 1EXP NFW well reached the total depth (TD) of 1,850 m encountered about 150 m of oil pay, assumed in the Lower Pliocene section. The trap is assumed combined (anticline and facies change) with estimated prospective resources of 123.4 MMboe with a revised geologic chance of success of 36.3%.  Based on the promising high potential in both discoveries, Repsol is preparing the appraisal and development plans to obtain the approval from the Mexican regulators.   On 7 May 2018, the consortium of Repsol, operator, PC CarigaIi, Sierra Nevada, and PTTEP was granted an official award for the CNH-R02-L04-AP-CS-G10/2018 contract, Area 29, AP-CS-G10 block from the CNH-R02-L04/2017 Bid Round.    On 18 June 2019, Repsol was granted approval by the CNH for the first exploration plan related to the CNH-R02-L04-AP-CS-G10/2018 contract, Area 29.        On 21 January 2020, the CNH granted Repsol approval for its drilling permit request for the Chinwol 1EXP and Polok 1EXP in the CNH-R02-L04-AP-CS-G10/2018 contract, Area 29, AP-CS-G10 block as approved in its first exploration plan.
Chinwol 1, Polok 1 nfw's, (Repsol 30% op. Petronas 28,33%, Sierra Nevada 25%, PTT E&P 16,67% ), SE part of CNH-R02-L04-AP-CS-G10/2018 contract, Area 29, AP-CS-G10 block, off Tabasco, 2 oil disc. 12km apart, the 1st made from DW Round 2.4 acreage: - Chinwol 1 over 150m net oil pay from 3 zones in the L. Pliocene WD=462m, TD=1850m