If everything’s bigger in Texas — that holds true for oil fields as well.

Eagleville, in South Texas’ Eagle Ford, has dethroned Alaska’s Prudhoe Bay as the top U.S. oil field based on proved reserves, the Energy Information Administration said Friday.

Prudhoe Bay’s oil field in northern Alaska had previously held that spot, but it is now the third largest after the Eagle Ford field and the Spraberry Trend field in west Texas’ Permian Basin, the EIA said in a report.

Rounding up the top five, Colorado’s Wattenberg field was fourth, and Eagle Ford’s Briscoe Ranch fifth, the EIA said.

The EIA last published a ranking of U.S. largest oil CLM25, and natural fields in 2009. Eagle Ford, discovered in 2008, didn't even appear in that 2009 list.

The EIA defines “proved reserves” as estimated quantities of oil and natural gas that can be recoverable with reasonable certainty under existing economic and operating conditions.

According to the EIA’s report, both crude-oil and natural-gas reserves increased in 2013. Oil reserves increased for the fifth consecutive year, reaching 36.5 billion barrels, and natural-gas reserves offset their 2012 decline, reaching a record high of 354 trillion cubic feet.

In natural gas, the U.S.’s top natural-gas field is the Marcellus Shale area, which includes patches of West Virginia and Pennsylvania. Marcellus stole the top spot from Texas' Barnett shale area.