Andre Cabes, Jean Elgue, Jacques Tournier-Lasserve Societe Nationale Elf Aquitaine Paris The installation of a desulfurization unit for the Tchibouela oil field, offshore Congo, allowed produced low-pressure associated gas containing CO2 to be kept for gas lift operations while, for safety reasons, the large volume of H2S at low pressure was removed prior to compression. Since October 1989, the world's first offshore amine sweetening unit has worked satisfactorily and continues to prove that it is an attractive production alternative. For desulfurization, a selective methyldiethanolamine (MDEA) process, developed by Elf ...

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