Field/project development

Slickline-Deployed Fiber-Optic Cable Provides First Production Profile for High-Temperature Gas Well

This paper describes a case study in which, in the absence of a conventional production log, distributed fiber-optic sensing, in conjunction with shut-in temperature measurements, provided a viable method to derive inflow zonal distribution.

Silhouette of an Offshore Supply Vessel alongside oil platform Ringhorn in the North Sea
Source: Arild Lilleboe/Getty Images.

Distributed fiber-optic sensing (DFOS) allowed the continuous gathering of flow-profile information from a high-temperature, high-rate gas well. The objective of the case study described in the complete paper is to demonstrate that thermal inversion modeling can be used to produce a production-flow profile in an environment where conventional production logging is not possible. As a result of deploying DFOS, data can be acquired at more-realistic rates. Through performing of thermal inversion of distributed temperature sensing (DTS) data and analysis of distributed acoustic sensing (DAS) data, a more-accurate flow profile was achieved.


Culzean is a high-pressure/high-temperature gas condensate field in the central North Sea.

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