http://www.theaustralian.com.au/business/mining-energy/oil-shale-reserves-can-turn-israel-into-major-world-producer/story-e6frg9ef-1226025327281

^^^Maybe Nigeria can find some. Maybe I could!

We already have 34 billion barrels worth of oil sands in SWest Nigeria extending from Okitipupa to just near the Republic of Benin Border. Exploitation will start when the oil wells dry up in the delta.

kodewrita:

We already have 34 billion barrels worth of oil sands in SWest Nigeria extending from Okitipupa to just near the Republic of Benin Border. Exploitation will start when the oil wells dry up in the delta.

43 billion barrels, not 34.

More info:
http://mmsd.gov.ng/privatisation/docs/Bitumen%20Overview.pdf
http://www.mmsd.gov.ng/Downloads/Tarsand%20&%20Bitumen.pdf

As that article the OP linked to indicates, a lot less profitable to extract than conventional sources. And also pretty negative effects on the environment.

@ekt_bear merci. was working with some earlier info I heard in an energy seminar: 41 confirmed barrels of oil (much closer to 49 with offshore now), 34 barrels of oilsands (43 confirmed by you) and 184 tscf of natural gas.