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US Geological Survey has released a statement that 19 million bbl of undiscovered, technically recoverable crude oil and 244 billion cubic feet of undiscovered natural gas sit within the Puerto Rico-US Virgin Islands Exclusive Economic Zone.

The US Department of the Interior said it used the geologic framework of  presence and viability of source rocks, reservoir rocks, traps, and timing considerations to define three hypothetic petroleum systems and five assessment units (AU).

These AU assess the potential for technically recoverable resources in new field discoveries.

Economic resources were not evaluated.

That assessment produced the estimates of 19 million bbl of crude, 244 bcf of gas, and 6 million bbl of natural gas liquids.

There also is no petroleum potential in US Virgin Islands and Puerto Rico onshore areas, the report noted.