Aqua Renew

To conserve water, we reclaim our produced water through Aqua Renew®. We began this water-recycling initiative in 2006 as a logical evolution of our involvement with the Barnett Shale Water Conservation and Management Committee in North Texas. We also collaborated with the City of Fort Worth, Texas, to explore the possibility of recycling produced water from the Barnett Shale.

Our Marcellus and Utica shale districts now treat and recycle a vast majority of the produced water from their operations. At each wellsite, we collect and store produced water in holding tanks before transferring it to central locations, where we remove suspended particles through either gravitational separation or filtration. We test the water for salt and other minerals—to determine the rate at which it must be blended with freshwater to ensure proper water quality and quantity for reuse by our operations. We then store it in onsite tanks or transport it to the next well scheduled for hydraulic fracturing.

This process allows us to filter and reuse 97% of the wastewater produced by our operations in the Marcellus North and 89% of the wastewater in the Utica district.

Every gallon of produced water that we filter and reuse helps reduce both disposal transportation and the purchase of freshwater. This is a win-win for our bottom line and our conservation efforts.

We are expanding Aqua Renew across our operating areas. Although freshwater is preferred for our work, we are experimenting with newer additives and higher concentrations of salt in our base fluids. In fact, several of our wells in the Mississippi Lime play in northwestern Oklahoma were fractured using 100% produced water. We are monitoring these wells for any long-term adverse production effects. We also are exploring the use of brackish, nonpotable aquifers as potential sources for fracturing fluids.

What is "Produced Water?"

Produced water is a byproduct of natural gas and oil extraction. It travels with produced oil or gas through the wellbore to the surface during well completion and production. Generally, this water contains a variety of salts, sand and silt found naturally in the Earth.

Due to water-quality and other regulations, not all produced water can be recycled or reused for other drilling operations.