ABSTRACT

Bottom hole temperatures from electric log surveys were collected from all non-confidential oil tests that recorded temperature data. These data include points from 287 wells in Florida and 33 in Georgia. Computed gradients were compiled into county averages, and a preliminary geothermal gradient map was drawn.

Peninsular Florida, south of a NE-SW trending zone through Taylor and Nassau Counties, is characterized by gradients generally less than 1.0 degree (F)/100 feet. Northern Florida and southern Georgia are characterized by gradients that generally exceed 1.0 degree (F)/100 feet. A weak and questionable increase in gradient may occur over the Sunniland Field in southwest Florida.

The observed NE-SW geothermal trend parallels the Appalachian Mountain belt and coincides with known magnetic and gravity features of the area. It also parallels the migrating Cretaceous to Recent clastic-nonclastic boundary in northern Florida.