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Backfilling of Trench Route for Pipelines
South Pars Gas Field – Phase 12
The South Pars Phase 12 project, commissioned by IOEC, plays a vital role in advancing the region’s energy infrastructure, aiming to produce gas and condensate for export. The offshore development, located 100 kilometers from the Iranian coast in the Persian Gulf, encompasses a range of critical components including wellhead platforms, sealines, and export pipelines.
Read more . . .Delta Offshore Technology was entrusted with the crucial task of backfilling the trench route for the pipelines, a key operation to stabilize and protect these pipelines after installation. This project highlights Delta’s commitment to ensuring the long-term integrity and safety of offshore infrastructure, while meeting both technical specifications and environmental requirements. With a strong focus on precision, environmental compliance, and operational efficiency, this project exemplifies Delta Offshore Technology’s expertise in complex offshore pipeline operations.
Project Overview
Project Overview
Commissioned by IOEC, the South Pars Phase 12 project aims to produce gas and condensate for export, representing a critical component of the region's energy infrastructure. The offshore section is located approximately 100 kilometers offshore in the Persian Gulf at a water depth of around 70 meters and includes the development of:
Read more . . .- Three identical 15-slot wellhead platforms (SPD 14/15/16).
- Three 32-inch sealines, each designed to transport 3 x 1,000 MMSCFD of saturated gas and condensate to the onshore gas treatment plant in Tombak.
- A 4.5-inch piggyback line attached to each sealine for transporting lean MEG (mono ethylene glycol) from onshore facilities to the wellhead platforms.
- A 30-inch export pipeline connecting the onshore plant to a Single Point Mooring (SPM) system nearshore for the export of condensate (NGL).
Delta Offshore Technology was tasked with the critical backfilling operations required to stabilize and protect these pipelines following installation.
Delta Offshore Technology’s Scope of Work
Delta Offshore Technology’s Scope of Work
As part of the offshore development, Delta Offshore Technology successfully executed the following:
Read more . . .- Supply of Backfilling Materials: Sourcing high-quality, approved backfilling materials to meet technical and environmental standards.
- Transportation of Materials: Efficiently transporting the backfilling materials to the offshore installation site.
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Installation of Backfilling Materials:
- Strategic placement of backfilling materials around and on top of the three 32-inch export pipelines and the SBM pipeline.
- Ensuring the trench route was completely filled to provide stability and protection against external environmental factors, such as ship anchor drags or seabed movements.
Project Challenges and Achievements
Project Challenges and Achievements
- Precision and Safety: Backfilling operations required precise placement to ensure the long-term integrity of the pipelines while maintaining strict safety protocols.
- Environmental Considerations: Careful execution ensured minimal disruption to the marine environment, meeting all regulatory requirements.
Project Outcome
Project Outcome
Delta Offshore Technology successfully delivered the project, adhering to IOEC’s strict timelines and quality standards. The completed backfilling operations enhanced the structural stability and operational reliability of the export and SBM pipelines, safeguarding them against potential seabed risks and external threats. This project underscores Delta Offshore Technology’s expertise in offshore pipeline operations and its ability to provide reliable, innovative, and environmentally compliant solutions for large-scale energy projects.