Drill-pipe logging string redesign cuts costs for Hibernia

Click here to enlarge imageA drill-pipe-conveyed logging string, capable of gathering in one run per well all measurements and fluid samples needed for proper reservoir evaluation, is one of the innovative tools used in developing the Hibernia oil field, offshore eastern Canada (Fig. 1). Click here to enlarge imageLocally called a "superstring," this string (Fig. 2) includes a standard log suite (gamma ray, density, photoelectric effect, neutron porosity, and caliper) with an array induction-resistivity tool. It is capable of acquiring data at multiple investigation depths for oil-water differentiation, and with its modular formation tester, it also can collect reservoir pressure data ...

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