Petroleum exploration in Belize began in the 1930’s. Oil exploration licenses were granted to the large oil companies such as Shell, Esso, Texaco, Gulf Oil, Anschutz and Chevron as well as smaller companies such as Occidental Petroleum and Phillips Petroleum and small independent oil companies to explore for petroleum in both the onshore and offshore areas of Belize. Many two dimensional seismic surveys were conducted which acquired thousands of line kilometers of seismic data and most of the surveys were done in the offshore waters of Belize. The first exploration well that was drilled in Belize was the Yalbac #1 well located in the Yalbac Hills in the Cayo District which was drilled by Gulf Oil in 1956. Up to 2000, a total of 50 exploration wells were drilled, 34 onshore and 16 offshore. No commercial discovery was made in any of these wells but some had minor oil shows. The Eagle #1 well drilled in 1984 in Belmopan came closest which recovered approximately 3 barrels of light crude oil when it was production tested, but did not prove commercial. The last wells drilled during this exploration period were the Gladden #1 well drilled by the Dover Consortium in the Glovers Reef area and the Noh Mol #1 well drilled by Spartan Petroleum in the Consejo Shores area in Corozal, which were both completed in 1997.