ExxonMobil affiliate Esso Exploration and Production Guyana Ltd. commenced drilling of the Snoek well on February 22, 2017 and encountered 25 metres of high-quality, oil-bearing sandstone reservoirs. The well was safely drilled to 5,175 metres in 1,563 metres of water on March 18. The Snoek well is located in the southern portion of the Stabroek Block, approximately 9 km to the southeast of the 2015 Liza-1 discovery.
Following completion of the Snoek well, the Stena Carron drillship has moved back to the Liza area to drill the Liza-4 well.
The Stabroek Block is 26,800 square kilometers large. Esso Exploration and Production Guyana Limited is operator and holds 45 percent interest in the Stabroek Block. Hess Guyana Exploration Ltd. holds 30 percent interest and CNOOC Nexen Petroleum Guyana Limited holds 25 percent interest.