The updated (from June 2008) UG Center’s Special Report on the Haynesville shale formation provides an in-depth look at the Jurassic and Cretaceous rock system that lies within the Gulf Coast Basin, which extends from the Texas-Mexico border in the west to the Florida Panhandle in the east. The Haynesville is in the onshore and State waters portion of the U.S. Gulf Coast.
According to current U.S. Geological Survey studies, it contains an estimated mean of 4 billion barrels of oil, 304.4 trillion cubic feet of gas, and 1.9 billion barrels of natural gas liquids. These estimates, the largest continuous natural gas assessment USGS has yet conducted, include petroleum in both conventional and continuous accumulations, and consist of undiscovered, technically recoverable resources. In a 2010 estimate, the USGS assessed the Haynesville at 61.4 trillion cubic feet of gas