Ziebel, a Stavanger-based provider of specialist well intervention services for the oil and gas industry, announced that it successfully completed a distributed fibre optic (DFO) sensing campaign for Statoil. Ziebel used its new gravity-deployed carbon composite cable, the Z-Line®, to gather Distributed Temperature and Distributed Acoustic fibre optic data on the Huldra installation – Statoil’s first unmanned platform which ceased production in September 2014. The interventions were carried out to optimise Statoil’s plans to plug and abandon the installation next year.
Working from the Huldra platform, Ziebel ran the Z-Line in two wellbores to measure temperature and acoustic profiles. Ziebel carried out work over two 3-day periods in April and May 2015. Each operation was completed as planned, providing data that displays the conditions of each well in its entirety, during each intervention. It allows Statoil to observe fluid movements, confirm the integrity of the wells and plan the final abandonment, enabling the optimisation of the forthcoming plug and abandonment campaign.
“As Statoil prepares to plug and abandon the Huldra platform, we appreciate how important it is to have a comprehensive picture of well conditions in order to formulate the optimum approach,” said Stig Hognestad, Chief Executive Officer for Ziebel. “Given that it was the first time that Ziebel has worked for Statoil, it was very satisfying that we were able to use the Z-Line to provide them with critical data that will enhance their understanding of those conditions,” he added.
The recent campaigns represent several ‘firsts.’ It was the first time that Statoil has commissioned a DFO sensing operation via intervention, Ziebel’s first ever operation for Statoil, and the first fully commercial well interventions carried out with the Z-Line by Ziebel.
Adapted from a press release by David Bizley