| 21. | In 1992 its proven reserve were estimated at 400, 000 million cubic meters.
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| 22. | Iraq has the second-largest proven reserves of oil in the world.
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| 23. | The country with the biggest proven reserves, Saudi Arabia, has 258 billion barrels.
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| 24. | There are still vast stores of proven reserves in the ground.
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| 25. | Production from Congo is very small but has 80 % of proven reserves.
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| 26. | The two Colombian fields have proven reserves of about 2 billion barrels of oil.
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| 27. | They have only recently been considered proven reserves of oil.
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| 28. | New proven reserves are commonly added by new field discoveries.
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| 29. | It is regarded by some as somewhat less strict than the SPE proven reserves.
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| 30. | Regulatory and contractual conditions may change, and also affect the amount of proven reserves.
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