Oilfield Review Winter 1998

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Planning and Drilling Wells in the Next Millennium

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Planning and Drilling

Because of recent developments in integrated computing, the initiation and implementation of well construction processes is moving from a step-wise method to a more interactive approach By sharing a database, teams of multidisciplinary professionals can increase efficiency and reduce cycle times. During operational phases, specialized software modules and systems reduce cost and risk by allowing plans to be easily amended on the fly.

Key Issues in Multilateral Technology

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Multilateral Technology

Wellbores with multiple forked branches and laterals reduce overall costs, increase production and improve reservoir drainage. These types of wells can increase recoverable reserves, make reservoirs easier to manage, and are growing in popularity. However, constructing complicated well profiles is challenging and risky. The latest applications and system developments are convincing operators that multilateral advantages outweigh the disadvantages.

Pushing the Limits of Formation Evaluation While Drilling

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Formation Evaluation While Drilling

Logging measurements taken while drilling reveal previously elusive formation characteristics. Real-time resistivity and density readings made at a variety of investigation depths and azimuths are the cornerstone of this new formation evaluation capability. These measurements supply interpreters with data to assess reservoir quality and structure in spite of filtrate invasion, formation dip, resistivity anisotropy and thin beds, and from smaller hole sizes than ever before.

Using Downhole Annular Pressure Measurements to Improve Drilling Performance

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Donwhole Annualr Pressure

A simple concept like measuring pressure downhole can profoundly impact a broad range of applications. Combined with other well parameters, these measurements are used to monitor borehole fluid conditions, which leads to early detection of problems such as stuck tools, annulus packoff, lost circulation and fluid influx. Monitoring annular pressure at the drilling bit also provides accurate formation stress measurements, making the process of drilling ahead safer and more exact.

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