Consub has developed more than 30 Integrated Standard Operating Procedures (ISOPs) to support first oil and early operations from the FPSO and deepwater subsea facilities for ONGC’s 98/2 project offshore eastern India.
The company developed a further 10 ISOPs to support first gas from the subsea fields to the CPP facilities and the subsequent export to the onshore gas terminal.
A multi-disciplinary engineering/operations team in the UK and India worked on the program.
According to Consub, with many large subsea/host facility projects, there can be technical and procedural gaps in the interface between the respective systems. This can introduce risk and ambiguity into the integrated operation.
The team for the 98/2 development delivered suites of ISOPs, which proceduralized the initial well starts, planned and unplanned shutdowns, restarts (warm and cold), hydrate mitigation and management, gas lift and water injection startup, shutdown, depressurization, and subsea production loop conditioning.
For the ISOPs for the subsea to host CPP aspects of the project and onward delivery to the onshore gas terminal, the team addressed management of MEG and backpressure in the gas production pipeline systems.
The fields are now managed in accordance with the authoritative guidance provided in the ISOPs, Consub said, with the formally proceduralized operations providing predictable outcomes.
CONSUB announced in June that the ONGC 98/2 project in India was more than 90% complete.
