"The steel casing and cement sheathing in an oil and gas well are designed to last for as long as the productive life of the well. About twenty years for a conventional well. About ten for a shale well. Long before that many of them leak, and sometime after the end of their productive life, they will all leak. Because ferrous metals are not immortal. Particularly when awash in brine. Horizontal (“deviated” in Canada) wells leak up to 10 times more than conventional vertical wells. "
"This hollow used to be peaceful. Not long ago, Randy Heater and his daughters would roam the Monroe County hills to hunt, setting up deer stands on quiet fall days when the air was still. On Dec. 13, that stillness shattered. Crews lost control of a fracked well on a hilltop near Heater’s house. Natural gas surged into the air. From their backyard, less than a mile from the well, the Heaters heard it. The rushing gas sounded like a broken air hose, Heater said — a deep, steady WHOOOOSH. As the weekend approached, gas was still spewing uncontrollably."
"The hypothetical leakage of methane gas caused by fracking a 1,000-m deep Cretaceous clay-stone horizon at Damme, Germany, is simulated in a TOUGHREACT reactive-transport model with 5,728 elements. A hypothetical leakage zone connects the Cretaceous horizon with a Quaternary potable-water aquifer (q1). Methane gas rises up to the q1 horizon in less than 2 days in all calculated scenarios. The simulations include the major constituents of groundwater as well as the seven most hazardous trace components that are natural constituents of groundwater (As, Cd, Cr, Ni, Pb, Se and U)."
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