Haynesville Shale

The Haynesville Shale is a rock formation mainly composed of consolidated clay-sized particles deposited and buried in northwest Louisiana and East Texas more than 170 million years ago during the Upper Jurassic age. It is characterized by ultra-low permeability but has a high porosity compared to other shales.

The Haynesville Shale came into prominence in 2008 as a potentially major shale gas resource. Producing natural gas from the Haynesville Shale involves drilling wells from 10,000 feet and to 13,000 feet deep. The formation is deeper in areas nearer the Gulf of Mexico. The Haynesville Shale has recently been estimated to be the largest natural gas field in the contiguous 48 states with an estimated 250 trillion cubic feet of recoverable gas. Production has boomed since late March 2008, creating a number of new millionaires in the Shreveport, Louisiana region.

Monday, May 23, 2011

Number of Saltwater Injection Wells Increase


The number of saltwater injection wells has increased by 116 since the start of the Haynesville Shale development in Caddo, Bossier, DeSoto and Webster parishes in early 2008.

Produced water, or saltwater, is created during the production of natural gas and oil. Some oil and gas operators are recycling produced water in other hydraulic fracturing operations. But underground injection through Class II injection wells is the preferred method to dispose of the thousands of gallons of fluid.

The saltwater typically is trucked from the drilling site to the permitted saltwater disposal well locations. Given the number of wells being drilled in the Haynesville Shale, that means hundreds, if not thousands, of 18-wheelers, also referred to as saltwater trucks, are traversing parish roads and state highways on a daily basis.


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