INA has successfully completed the first stage of an environmental remediation project beneath the Rijeka oil refinery, in collaboration with an international consortium led by Lamor and Litocrean.
The initial phase focused on detailed subsurface investigation. Five exploratory wells were drilled, followed by comprehensive geological and hydrological analyses to better understand fluid movement within the karst terrain under the refinery. Core samples were examined, and the boreholes were inspected using three types of camera systems to map underground conditions with precision.
With the groundwork complete, the project has moved into its second stage, which began in mid-January. This phase includes additional drilling and the preparation of technical documentation for a hydraulic barrier system. The barrier, consisting of a line of wells along the Urinj peninsula shoreline, will create an artificial underground depression, the lowest pressure point in the area, to collect and channel contaminated fluids, preventing their migration toward the sea. This system is a central element of the long-term marine protection strategy.
The third phase will involve installing treatment equipment and initiating pumping operations. The full project, valued at 6 million euros, is scheduled for completion in 2027 and aims to permanently address legacy contamination beneath the refinery complex.
Alongside the long-term solution, INA continues immediate protective measures. Currently, 33 extraction wells are actively removing residual hydrocarbons from the karst system. Continuous marine monitoring ensures a rapid response if necessary. Regular inspections of storage tanks, drainage systems, and stormwater infrastructure are being conducted, while remediation activities proceed according to plan. As an additional safeguard, stronger offshore containment booms will be installed along the coastline once the required permits are secured from the relevant authorities.
