The Ambejack Field (Gulf of Mexico: Mississippi Canyon 109) was originally drilled in the early 90s. A second phase of drilling began in 1998, with each well in the program presenting a unique set of challenges to the Amberjack team. In this presentation, the pore pressure case history of the early wells in this program is discussed.

Pore pressure work on the field, using offset well RFT, sonic and resistivity data, indicated a pore pressure uncertainty range of 3 ppg, around which the A16ST (T) well had to be planned. For a well that was initially considered to be in a development/production setting, a surprising number of complications entered the planning process.

During drilling, pressures were monitored using resistivity and well performance data: the well had to be sidetracked to reach TD. A post-well pore pressure interpretation is proposed in which a series of pressure ramps were drilled in this well. This conclusion is reached through the integration of all available pressure data sources in the well.

End_of_Record - Last_Page 11---------------