Oilfield Review October 1990

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Magnetotelluric Prospecting

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Geophysicists map the earth’s resistivity profile to determine subsurface structures and geology. The electromagnetic waves that produce these fields originate in the magnetosphere and ionosphere.

Shear Wave Logging with Dipoles

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Shear Wave

A new generation of shear wave logging tools implements the dipole source to measure shear wave slowness. Combined with other log outputs, slowness measurements improve appraisals of rock lithology and fluid content and assist borehole and surface seismic interpretation.

Advancing Wellsite Radiation Safety

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Elimination of radioactive sources, better detection of naturally occurring radioactive material (NORM) and safer source shielding- there are some of the advancements in nuclear logging that are enhancing wellsite safety. We review a safety program that is advancing nuclear logging tools and techniques.

Factoring Anisotropy into Well Design

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Permeability and stress anisotropies are key factors determining the way to tap a reservoir that will maximize yield. Here we look at how anisotropies in permeability and stress affect well spacing and placement, hydraulic fracturing and the decision of whether the well should be vertical or horizontal.

Environmental and Safety Issues for Drillers

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Oil-base mud, regulatory agencies and kick detection are increasingly on oil companies’ minds environmental issues take root. Top drillers from major oil companies, convened in a roundtable last March, discuss how the industry is adapting to tighter standards and increased pressure to conduct clean and safe operations.

New Technology for Saving Lives

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Saving Lives

Taming the earth’s natural resources with complex and sometimes unwieldy equipment forces the oil industry to give special priority to safety. Progress comes from awareness schemes and technical innovations. We describe three examples of recent technology expressly designed to prevent accidents in driving, in perforation operations and in gas kick control.

Reducing the Oilfield’s Environmental Footprint

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The environmental consequences of exploration and production activates are increasingly in the spotlight. Regulations are tightening and pressure is on to perform jobs more cleanly. This article looks at three ways technology is being applied to help cut environmental impact of oilfield operations.

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