Oilfield Review Winter 2004

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Editorial: Rotary Steerable Technology: Pushing the Limit Download file (0.05 MB PDF)

Powering Up to Drill Down

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Safety first

A new rotary steerable drilling system includes an integrated power section that converts the hydraulic power of circulating fluid to rotational torque. This supplements rotational torque supplied by the drilling rig and produces unprecedented high rates of penetration, making it ideal for drilling hard formations. Like other advanced rotary steerable systems, this high-performance technology offers the advantages of continuous rotation at drillstring speed to minimize stick/slip phenomena and improve efficiency.

Expanding Applications for Viscoelastic Surfactants

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Molecular level view of viscoelastic surfactants

Viscoelastic surfactants (VES) revolutionized fracture stimulations in the mid-1990s. Today, continued advances in VES chemistries allow engineers to apply these unique materials in new ways that dramatically improve and optimize well-completion techniques. Case studies from South America, North America, the North Sea and the Caspian Sea demonstrate the effectiveness of VES fluids in difficult gravel-packing, hydraulic fracturing and acidizing operations.

Scientific Deep-Ocean Drilling: Revealing the Earth's Secrets

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Drilling for science has contributed to an understanding of the dynamic processes that affect climate, natural disasters and the creation and distribution of resources on Earth. This article reviews the history of scientific deep-ocean drilling, technological developments and plans for the 21st Century.

Reducing Uncertainty with Fault-Seal Analysis

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Entrada sandstone

Faulting can have an enormous impact on oil and gas exploitation. Faults are often responsible for trapping hydrocarbons and compartmentalizing reservoirs. They can also introduce a high degree of uncertainty in both the exploration and development stages. This article describes how geoscientists and engineers are improving their understanding of faults in siliciclastic reservoirs, and how they analyze, model and simulate the effects of faults on subsurface fluid flow. Examples from Hibernia, Newfoundland, Canada, and Prudhoe Bay, Alaska, USA, illustrate the successful application of modern fault-seal analysis methods.

A New Horizon in Multiphase Flow Measurement

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Phase Tester portable multiphase periodic well testing system

Measuring three-phase flow without separation increases the accuracy of gas, oil and water measurements. This technology helps engineers quantify changing fluid phases over time to better understand dynamic flow. Case studies from Australia, the Gulf of Mexico and Africa illustrate the benefits of advanced multiphase meters and show how they help enhance production, improve field operations and optimize reservoir management.

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