MOSCOW/LONDON (Reuters) – As OPEC’s efforts to balance the oil market bear fruit, U.S. producers are reaping the benefits – and flooding Europe with a record amount of crude. FILE PHOTO: A pump jack operates at a well site leased by Devon Energy Production Company near Guthrie, Oklahoma September 15, 2015. REUTERS/Nick Oxford/File Photo Russia paired with the Organization of the Petroleum Exporting Countries last year in cutting oil output jointly by 1.8 million barrels per day (bpd), a deal they say has largely rebalanced the market and one that has helped elevate benchmark Brent prices close to four-year highs. Now, the relatively high prices brought about by that pact, coupled with surging U.S. output, are making it harder to sell Russian, Nigerian and other oil grades in Europe, traders said. “U.S. oil is on offer everywhere,” said a trader with a Mediterranean refiner, who regularly buys Russian and […]