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The very size of oil reservoirs in Saudi Arabia means that as the dominant method of water flooding is used to sweep oil to the producing wells, not all the oil in place migrates as hoped. Some remains in place and this makes up a very significant volume of possibly lost production. This is particularly true in reservoirs such as the Hanifa and Hadriya reservoirs at Berri, where water flooding since 1975 has largely obscured the field. Recognizing this problem, Aramco has increasingly used sophisticated mathematical models of various reservoirs to help locate these remaining pools, searching for oil volumes that could be successfully recovered.
Why didn’t they look around, realize what they were doing, and stop before it was too late? What were they thinking when they cut down the last palm tree? — Jared Diamond, EASTER’S END The challenge of Darwinism [then] is to find out what our genes have been up to, and to make that knowledge widely available as a part of the environment in which each of us develops and lives so that we can decide for ourselves, quite deliberately, to what extent we wish to go along. — Richard D.