This is why the leading petrochemical Abu Dhabi has his focus on the shale of North America

Although North American shale may compete with OPEC members, some oil-exporting Persian Gulf countries are simultaneously betting on the resource as a potential investment opportunity.

One of them is the United Arab Emirates, and Musabbeh al-Kaabi, Abu Dhabi's chief executive, Mubadala Petroleum and Petrochemicals, keep an eye on U.S. shale.

A major component of Mubadala Investment Company, the state-owned holding compa....