Good question. The answer is: no and maybe!
There is no oil or gas production in Somalia. Somalia has no proven reserves.
Underground depostis may exist. For underground deposits to become commercial projects, there must be commitments to spend money from investors. The pull out of Africa Oil in January 2009 does bode well for more exploratory efforts, at least in the short term.
See related links.
the gas is collect above the oil because it has less dense
The Government, and people of Somalia of course.
This is because natural gas and oil deposits were formed together
Deposits of oil and natural gas.
Asia and Africa
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North Sea
Anticline formations can trap oil and gas creating deposits.
Yes, Ukraine does have domestic deposits of oil and gas besides it has large deposits of coal methane and probably the world largest deposits of shale gas. You can get numbers from this paper ENERGY SECURITY CHALLENGES IN UKRAINE A SNAPSHOT-2010 International Centre for Policy Studies
Yes, most Mexican oil and gas deposits are located in the Gulf of Mexico.
Somalia does have huge potential for oil, figures like the one you have quote have been estimated to be inside Somalia. While oil wells have been found in land somalia, the real potential lies in gas and oil discovered waiting to be found At the end of the day only God really knows what Somalia has or has not. Let's hope that the Somali's strike it huge
Siberia.