The OPEC logo is seen outside their headquarters in Vienna, Austria May 24, 2017. Two weeks after an OPEC-led deal to extend oil output cuts until March, some OPEC delegates are questioning whether the agreement will be enough to reduce a glut in supplies and lift prices. Prices have fallen more than 10 percent to below $50 a barrel since the Organization of the Petroleum Exporting Countries and allies agreed on May 25 to prolong a deal to cut about 1.8 million barrels per day (bpd) until the end of March. The deal was initially due to run during the first half of 2017. Even a political dispute between Gulf states, the source for most of OPEC’s crude, has failed to drive prices higher. Instead, eyes are trained on Nigeria and Libya, two OPEC states that were excluded from the regime of cuts to help them recover from years […]