Well-SENSE Technology Ltd. has achieved success with its pioneering FibreLine Intervention (FLI) technology for an oil major operating in the Eagle Ford.
The trials demonstrated that, by using FLI, wells can be temperature profiled over an extended period of time, in a cost-effective manner, without affecting drilling schedules.
FLI offers an entirely new approach to well intervention and combines several innovative concepts in a single package. As a hugely simplified disposable intervention method, it represents a radical advance in downhole tools for the industry massively reducing cost and risk.
A properly cemented surface casing is a fundamental requirement for well integrity of any well. In the U.S., there is legislation in place to protect the environment during life of well, which includes being able to demonstrate where the Top of Cement (TOC) is. Getting acceptable cement returns is a common requirement.
Where cement returns are not seen, data (for example, temperatures) must be provided to validate the TOC, which is usually achieved by using Electric Line and a single point measurement tool string.
To establish the TOC in-line with legislation, a U.S.-based operator enlisted Well-SENSE’s innovative technology, FLI. A fiber optic line was installed using the FLI system and utilizing Distributed Temperature Sensing (DTS), the development of temperature across the entire well (5,250 ft) was monitored at 1-m increments, over a 53-hr period, at one-minute intervals.
In doing so, the technology created a detailed profile of the cement curing process. This data will be used as a reference for future operations where FLI will be installed to determine the TOC, in wells where cement returns are not seen.