Moving to end its dependence on natural gas imported from Russia, the Ukrainian government announced this week that it has reached a $10 billion shale gas exploration and production-sharing agreement with energy giant Chevron.

The transaction, which could have huge geopolitical implications given the former Soviet republic’s push to shed its reliance on Russian energy, has yielded roles for Morgan, Lewis & Bockius and independent Ukrainian shop Asters, the second Ukraine-centered deal in which both firms have had a hand this year.