Cover: Oilfield Review Winter 2002
(0.39 MB PDF)
Editorial: Independent Activity in Deep Water
(0.06 MB PDF)
Exploration geologists and seismic interpreters use seismic data to get a clear picture of subsurface structures, sedimentary sequences and other key elements of promising drilling targets.They also incorporate information from surface features, or analogs, to infer shape, size, composition and other depositional characteristics of targeted formations. In this article, we show how features seen on the seafloor can be used to identify high-quality sands and potential exploration targets in deepwater seismic surveys offshore West Africa.
The process of managing and producing oil and gas reservoirs continues to evolve. Advanced continuous,surveillance technologies now provide crucial information that enables the industry to produce fields previously not considered exploitable and to better manage existing fields.Permanent downhole and surface sensors help define production behavior and are used to monitor the performance of artificial-lift systems,guiding timely well-and field-optimization actions. Modern completion installations integrate elements of wellbore and reservoir monitoring with intelligent control systems driven by real-time information.
Producing hydrocarbons from deepwater accumulations is not routine, even after decades of activity. Advances that make deepwater production possible spring from both pure innovation and modification of technology applied in other operating environments.In this article, we highlight well-completion and cementing technology specific to the deepwater environment and discuss technical advances that allow otherwise uneconomic projects to go forward.
Subsurface safety valves are installed in wells with the hope that they will never be needed. In the event of a major incident, however, this critical safety device is subject to high demands. This article reviews the develop ment of key features in modern subsurface safety systems and demonstrates through case studies how knowledge and understanding of producing environments are crucial for safe operations, equipment reliability and, ultimately, ensuring environmental protection.
Download file (0.06 MB PDF)
All pages in this issue
Download file (7.32 MB PDF)