Subsea engineering firm GeoSonic has been selected to execute a comprehensive inspection program covering more than 200 kilometres (about 124 miles) of critical offshore pipeline infrastructure in the Caspian Sea.

The contract marks GeoSonic’s second major award in Turkmenistan, expanding its footprint in a region where underwater infrastructure is vital for Central Asian hydrocarbon production and global exports.

While the operator of the pipeline network and the exact project timeline have not been disclosed, industry analysts note the campaign underscores a growing regional shift toward strict asset integrity management.

The targeted pipelines are central to Turkmenistan's energy transport network, which draws from some of the largest natural gas reserves in the world.

The offshore campaign will rely heavily on remotely operated vehicles (ROVs) to conduct detailed visual inspections of the submerged pipeline sections. Utilizing ROVs minimizes human diving risks in the challenging Caspian environment while capturing high-precision structural data.

Additionally, the technical scope includes comprehensive geophysical surveys to monitor the surrounding seabed conditions. Marine currents and shifting sediments can cause scouring or pipeline displacement, which threatens the stability of the lines.

Engineers will also evaluate the infrastructure’s cathodic protection systems. These systems are the primary defence against electrochemical corrosion, a leading cause of metal degradation in marine environments.

By measuring these systems, the inspection aims to identify early signs of external corrosion, coating loss, or mechanical damage before they escalate into costly operational failures or environmental hazards.

The offshore energy sector is increasingly prioritizing these specialized, multi-method inspections as ageing infrastructure faces higher demands.

By combining ROV data, geophysical imaging, and corrosion analytics, operators can pivot toward condition-based maintenance rather than relying on standard, scheduled interventions.

For Turkmenistan, maintaining the reliability of these subsea pipelines remains paramount to securing its economic position as a primary energy exporter.

The developments come as the country works to extend the TAPI gas pipeline, which it has named a top priority among infrastructure projects for 2026.