
Denver ranked third in a survey of the top 10 oil-and-gas cities in the world done by Rigzone, an industry employment and data clearinghouse.
The poll of 8,000 industry executives and engineers focused on the places with oil-and-gas-industry growth and opportunities.
Those opportunities are in Colorado’s tight sands and shale formations — particularly the oil-rich Niobrara shale.
Niobrara may hold a reserve the equivalent of as much as 2 billion barrels of oil, according to industry estimates.
The No. 1 city in the survey was Dubai, United Arab Emirates; followed by Calgary, Alberta; Denver; Singapore; and Jakarta, Indonesia.
Other cities on the list were Perth, Australia; Rio de Janeiro; Mumbai, India; Kuala Lumpur, Malaysia; and Cairo.



