On 27 January 2020, ExxonMobil, through its affiliate Esso Exploration and Production Guyana Limited (EEPGL), announced its sixteenth oil discovery with the Uaru 1 new-field wildcat (NFW) on the Stabroek Block offshore Guyana. The Uaru 1 NFW was drilled in 1,933 m (6,341 ft) of water and encountered some 29 m (94 ft) of high-quality oil-bearing sandstone reservoir.   The Uaru 1 was spud on 28 December 2019 utilizing Nobleâs ââTom Maddenâ drillship (DS). The Uaru 1 is located 16 km (10 mi) northeast of the Liza field where first oil production commenced on 20 December 2019.  The Stabroek Block is operated by EEPGL (45%) partnered with Hess Guyana Exploration Ltd. (30%) and CNOOC Petroleum Guyana Limited (25%).
Uaru 1  (ExxonMobil 45% op, Hess 30%, CNOOC-Nexen 25%) in Stabroek block located approximately 16km NE of the Liza fild, sixteenth discovery, encountered approximately 29m of high-quality oil-bearing sandstone reservoir. Operator stimated gross discovered recoverable resources, includes 15 discoveries, for the block to more than 8 Boe, up from the previous estimate of 6 Boe.