Cover: Oilfield Review Autumn 2005
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Editorial: Logging While Drilling: Striking a Balance Through Time
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An innovative logging-while-drilling tool and new interpretation software allow petrophysicists and engineers to assess reservoir potential immediately after bit penetration. This article describes these developments and demonstrates their usefulness in case studies from the Gulf of Mexico, the North Sea and the Middle East.
Exploration and production companies must predict, measure and manage formation pressure while drilling wells and producing oil and gas. This article reviews the development of geopressure systems. Case histories show how drillers, geologists and engineers are using advanced techniques for pressure prediction, detection and management that allow wells to be drilled more safely, boreholes to be placed more accurately, and reservoirs to be managed for maximum oil and gas recovery.
The acquisition of high-resolution, reliable and repeatable seismic data has been the dream of geoscientists and reservoir engineers for decades. This article introduces a single-sensor seismic acquisition and processing system that provides detailed information about the reservoirs that was previously unachievable with conventional seismic technology. This giant leap forward is as significant as the move from two-dimensional to threedimensional seismic acquisition in the 1980s.
Geosteering techniques are used to maximize exposure of wellbores to pay zones. Technology has been developed to determine distance and direction to formation resistivity contrasts while drilling. A new capability to ascertain distance as well as direction to formation or fluid contacts helps geoscientists optimize well paths. This is making a significant impact on production in mature fields, as shown by North Sea case studies.
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