The T-Block Fields, Block 16/17, UK North Sea

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abstract The Tiffany, Toni, Thelma and SE Thelma fields, collectively referred to as the T-Block fields lie wholly within UK Block 16/17 at the southern end of the South Viking Graben. The four fields were discovered between 1976 and 1980 and despite the fact that they share a common reservoir, the Upper Jurassic Brac Formation, they are quite distinct in terms of their petroleum content (type), reservoir quality and production performance. This paper summarizes the characteristics of the T-Block petroleum accumulations and highlights the differences between each of the field.