On 28 July 2020, CNH reported a non-commercial oil and gas discovery associated with the well Chibu 1EXP directional new-field wildcat (NFW). The well was drilled by Shell, and it is located in the CNH-R02-L04-AP-CS-G01/2018 contract, Area 20, AP-CS-G01 Block in the ultra-deep-water Campeche Deep Sea Basin. No further information about the well testing results was released. The NFW is in the north-eastern area of the block. The nearest well is located 145 km south and is the Tamha 1 plugged and abandoned by PEMEX in 2008. The NFW was spudded on January 16, 2020. Shell is operator of the contract and holds 60% working interest and Chevron holds 40% working interest.  The NFW had proposed total depth (PTD) of 6,731 m measured depth (MD) and 6,345 m true vertical depth (TVD) with a maximum inclination angle of 33Â°. The primary targets were the Oligocene section from approximately 3,700 m to 4,000m and the Upper Jurassic Oxfordian from 6,000 m to 6,110 m. The prospect trap was reported to be an east-west oriented, salt nucleated, anticlinal structure and Shell planned to penetrate approximately 50-100 m of salt at total depth (TD) below the Jurassic Oxfordian, with an estimated unrisked prospective resources of 143 MMboe in the Oligocene target and 76 MMboe in the Jurassic Oxfordian target. .  The "Deepwater Thalassa" D/S drilled the well in a water depth of 2,760 m. The drilling cost for the well was estimated on USD 87.1 million, and the abandonment cost USD 6.2 million.  On 7 May 2018, Shell was granted an official award for the CNH-R02-L04-AP-CS-G01/2018 contract, the 2,079.50 sq km Area 20, AP-CS-G01 block. For the Area 20 block, the company bid 20% of additional royalties over the minimum of 5%, 2.0 work units factor equivalent to two wells, and a tie-break bonus of USD 90.15 million.    On 11 June 2019, Shell was      granted approval by the CNH for the first exploration plan related to the      CNH-R02-L04-AP-CS-G01/2018 contract, Area 20, AP-CS-G01 block that      includes geophysical and geological studies as well as the drilling of one      firm commitment exploration well with an incremental case of drilling a      second exploration well.  On 13 November 2019, the CNH      granted approval for the drilling permit for Shell to drill the Chibu      1EXP.
(Campeche Deep Sea B.) Chibu 1EXP operated by SHELL (60%), CVX (40%) in the AP-CS-G01 block, WD = 2760 m reported non-commercial discovery (target Oligocene and Jurassic)