TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractIn the current climate of high oil & gas prices and forecast future shortfall in reserves, it is critical that new technology be implemented to maximize recovery from any suitable reservoir. One of the most promising areas of offshore oil and gas R&D has been the ongoing development of improved reservoir and production monitoring technology implemented using fiber-optic sensors. This paper will contribute new performance data for fiber-optic connection systems and sensor requirements and will document and contrast the various sensor technologies and their capabilities and applications.This paper provides a review of the advancements in fiberoptic in-well sensing technologies and the applications to which they can be applied, set-in context with the importance of optimizing reservoir performance. This is combined with an analysis of the development and qualification of fiber-optic feed-through systems that are a fundamental technology for the installation of in-well optical fiber. This discussion will include design guidelines for feed-through systems and will be supported by case studies for the sensor and feed-through systems proposed for BP Atlantis in the GOM, and BP's West Africa project, Greater Plutonio.The paper also offers a design guideline for the qualification of fiber-optic feed-throughs for horizontal and vertical trees and landing strings, and the fiber and system performance criteria for optical fiber sensors of various types. It will review the measurement capabilities and system requirements of various fiber sensor systems and will present the design problems, qualification methodology and test results for the development of fiber-optic feed-though systems for both vertical and horizontal X-trees.

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