They don't do any fraccing over there -- don't have to.
This is just another shot in the enviros anti-fraccing war.
Funny, though, that they've been fraccing in Texas and Oklahoma since the fifties -- but it just started showing up in 2009?
You are right, but for it to work, you have to become a victim to the intentional obfustication of the media.
These aren't frac jobs, they are disposal wells.
Water is produced, in some proportion to the oil produced, and that water is commonly salt water far too saline to pour out on the ground or simply dump in a creek, and often containing Hydrogen Sulfide dissolved in it. The best way to dispose of it is to find a suitable porous formation far deeper than any viable aquifer, with low enough pore pressure and already containing salt water, and inject the production water into that formation.
Such disposal methods for production water have been in widespread use since the '50s and earlier, and have, on occasion been linked with small siesmic events, usually when near known faults. It seems odd that suddenly this has become some sort of issue (none of the events has been 'major', ever).
The only thing I can see is that the MSM will attempt to equate the long term injection of production water with the short-term and finite fluid injection of a frac job, and then confuse the two so they can somehow use it against fracking.
The Commies' war on (our) oil continues.