While plunging output in Venezuela captures the oil world’s attention, problems are quietly festering in another OPEC nation.
Angola, once Africa’s biggest crude producer, is suffering sharp declines at under-invested offshore fields, with output dropping almost three times as much as the nation pledged in an accord with fellow OPEC members. With the losses set to accelerate — a shipping program seen by Bloomberg News shows crude exports will fall in June to the lowest since at least 2008 — the cartel risks tightening supply too much. […]