The preliminary deals signed by Angola's state oil company, Sonangol, Wednesday to develop two small fields in the most dangerous part of Iraq constituted a major breakthrough for Baghdad's high-risk drive to attract international oil companies to help it restore its flagging fortunes and transform the global energy market. Over the next 20 years Sonangol will develop the Qayara and Najmah fields, which between them contain an estimated 1.66 billion barrels of oil, in Nineveh province, where al-Qaida and other Sunni insurgents operate. But the Oil Ministry will pay the company $5-$6 for every barrel its produces. That's three times...