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Review files Exploration and Production


The volcanic island of Guam has no history of drilling and production, onshore or offshore. No exploration wells have ever been drilled in the territory or in its surrounding waters. Globalshift does not forecast any future production of oil or gas from the territory.

For recent events see News Briefs.



E and P

News Briefs



Guam lies at the southern end and on the western side of the Marianas Trench. The trench is part of the Izu-Bonin-Mariana subduction system that forms the boundary between the Pacific tectonic plate on the east and the smaller Mariana tectonic plate on the west.

Both plates are floored by oceanic crust with the older denser rocks of the western edge of the Pacific plate subducting beneath the younger eastern edge of the Mariana plate. The deepest area at the plate boundary is the Marianas Trench which is the deepest point on the earth’s surface.

The subduction process caused melting of the crust and upper mantle due to release of water trapped in minerals within the dipping plate leading to the volcanoes that form the Marianas islands, including Guam.

Globalshift considers that there is no chance of source rocks or traps in such a geological setting and Guam has no oil or gas potential.