This article help to understand the difficulties Montello encountered in Tennessee.

...There are good reasons why major oil companies have steered clear of Tennessee. About 215 million years ago, under the heat and pressure of a continental collision, the rocks in northern Tennessee began to bend. When they broke — in a series of long, jagged, parallel lines — oil and gas migrated from deep in the Earth into cracks and folds in the rocks. Prospectors in Tennessee spend lifetimes tracing the patterns of ancient breakage; they call it "chasing fractures."...

http://www.en.articlesgratuits.com/montello-resources-tsxvmeo-drilling-down-the-devils-throat-id1895.php

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