FuelFix (blog)Warburg Pincus to Invest $500 Million in Oil and Gas Firm IRMNew York TimesBy deploying money from its new energy fund, along with its 11th private equity fund, Warburg Pincus has become one of the few private equity firms to strike into an o …

FT.com (registration) (blog)Fall in Oil Prices Fails to Deter Mexico's Sierra Oil & GasWall Street JournalMEXICO CITY—Sierra Oil & Gas, a company born out of the liberalization of Mexico's energy sector, is aggressively participating in the …