The state agency that regulates the oil and gas industry is ordering an
Exxon Mobil Corp. subsidiary and another energy company to prove their wells aren't responsible for a swarm of earthquakes in North Texas.
On Friday, the Texas Railroad Commission told officials at Fort Worth-based
XTO Energy Inc., the Exxon subsidiary, and
EnerVest Operating LLC to appear at hearings scheduled for June to explain why their wells near Azle shouldn't be shut down.
The agency's order follows
findings published this week by seismic experts at Southern Methodist University that connected two wastewater disposal wells operated by the companies to a flurry of earthquakes that rocked the area northwest of Fort Worth between November 2013 and January 2014. The study concluded that the 30 temblors were most likely caused by high volumes of drilling wastewater injected deep into the ground as natural gas was pumped out.