Press Esc to close



For full content view: Log in Now!

  • Hybrid measurements improve reliability in gas storage application

    Enrico Barbieri, Andrea Gabbiani and Giles Powell

    Italy leads Europe in investment in underground gas storage (UGS) projects and is continually seeking technological advancements that render the fields safer and more reliable for the long term. One new technology recently investigated was a hybrid optical-electrical system to increase reservoir monitoring and facilitate higher-capacity UGS in one of the earliest UGS fields in Italy. As part of a strategic energy plan to increase the volume of UGS within the available reservoirs, an operator initiated field studies to determine how to efficiently increase the redundancy of the permanent monitoring in use. Current Italian legislation required certified downhole data, and environmental legislation required constant monitoring of downhole pressure. The system that was installed combines hybrid cable and connectors to join a premium quartz electrical gauge to a fiber-optic pressure gauge. As a result, one cable provided access to both gauges. By using two gauges with totally different modes of functionality yet similar metrology, the operator could greatly increase confidence about what pressure existed in the reservoir and how the reservoir was behaving over time. This information ensured that the gas storage facility was run safely and within its prescribed pressure limits. The hybrid permanent monitoring solution successfully demonstrated that combining multiple measurement techniques and principles into one cable can provide an alternative method of introducing measurement redundancy. This alternative has great potential value for operators that must reliably demonstrate their reservoir integrity with limited budgets.

This area of the site is restricted. In order to gain access, please either Log In, or subscribe to World Oil.

Two options are available to you for creating an account.

1. Get a Free Trial Subscription to World Oil Magazine and gain immediate access to select content on World Oil Online.

Start a Free Trial Subscription and gain immediate access to the complete current issue of World Oil Magazine. Plus, you’ll receive 3 upcoming issues of World Oil Magazine in print or digital format.* You also receive access to the Energy Events Calendar, Industry Statistics and WO Wire’s news and industry coverage.

Free Trial

2. Purchase a subscription to World Oil magazine and gain immediate and complete access to World Oil Online. As a Total Access subscriber you will have access to all areas of the site available to registered users and free subscribers as well as having access to such premium content areas as:

  • The Archives section containing over ten years of complete magazine archives,
  • The WO DataHub's engineering tables and directories,
  • The World Oil annual forecasts, including past predictions,
  • Select World Oil technical handbooks,
  • And much, much more!


Physical copies of this content may be available for purchase. Visit the Reprints & Back Issues section.

If you are already a paid subscriber and do not have access, please email



Engineering Data Tables

World Oil's specialized upstream Engineering Data Tables featuring the Drill Bit Classifier, Tubing Tables and more. Get Total Access today.


2013 Fracturing Technology

2013 Fracturing Technology