He spent the summer of 2003 at his holiday home in Maine, poring over technical studies describing the state of Saudi Arabia's oilfields.
They also fret that they will see none of Iraq's oil revenues, since most of the country's oilfields are in Shia and Kurdish areas.
Years in the making, it was published, to critical and popular acclaim in 1990, two months after Saddam Hussein invaded Kuwait, thereby putting Saudi Arabia's oilfields in peril.
Wastewater was first injected into Oklahoma's Wilzetta oilfields, near the town of Prague, some 18 years prior to the November 2011 series of quakes that included three of magnitude 5 or greater.
BBC: Oklahoma earthquake linked to oil extraction wastewater
Maridive, an offshore-oil-services contractor founded by an ex-navy commando and a petroleum engineer, built its expertise in Egypt's Gulf of Suez oilfields.
ECONOMIST: Wealthy Egyptian business families venture abroad
Reason: The Russians need Eni's expertise in developing complex oilfields.
Yet even if the power of Mr Saleh's state has seldom extended beyond Yemen's main towns, roads and oilfields, it is remarkable that he has maintained even a semblance of control (see book review).
More menacing to Iran's future is the accelerating decline of its oilfields.
Many countries would love to have Brazil's highly productive farms and its big new oilfields, two of the sources of its commodity dependence.
In April the government said it would let Yukos, an oil company, build a pipeline from the oilfields near Angarsk, said to be as big as Kuwait's, to Daqing in China.
ECONOMIST: Russia's natural jewel is at the mercy of oil money
Apache's employees are old pros at wringing more oil out of aging oilfields.
By contrast, China's state-owned oil companies have no direct interest in Angolan oilfields, one of their two biggest sources of crude.
Mr Bush has followed his father's career step by step, through Andover, Yale, the oilfields of Midland, Texas, and on into politics.
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