Here, according to  Radio Free Europe/Radio Liberty, are some of the details:
Under the agreement, the Yuzivska shale-gas field in eastern Ukraine would be tapped using the controversial new technology of hydraulic fracturing, or fracking. Ukraine is believed to have an estimated 1.2 trillion cubic meters of shale-gas reserves, the third-largest such deposits in Europe. Ukrainian officials say Shell’s investments would likely be around $10 billion but could go as high as $50 billion. Environmental groups say chemicals used in the fracking process can threaten the health of surrounding communities, but the industry has aggressively challenged those claims.
The good or potentially good news is: