Chesapeake is most proud of the Haynesville Shale because it was discovered by the company’s own geoscientists and engineers. More than twice the size the of the Barnett Shale’s core areas and so overpressured (holding more gas in place per square mile than the Barnett), the Haynesville Shale is anticipated to become the largest natural gas-producing field in the U.S. by 2015.