Damage assessments of offshore oil and gas facilities continued to move slowly Friday as the overwhelming majority of oil and gas production in the US Gulf of Mexico remained offline in the wake of Hurricane Ida.

In an update released Friday afternoon US time, the US Bureau of Safety and Environmental Enforcement said that 93.3% of Gulf oil production, or slightly less than 1.7 million barrels per day, remains shut in.

That is virtually unchanged from Thursday’s totals and in line with the numbers from the rest of the week. BSEE said that 1.99 billion cubic feet per day of natural gas remained offline, a slight improvement over previous days.

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The severe damage to the Louisiana coastline has made it difficult for producers to do more than overfly their assets.

During a flyover Thursday, Anglo-Dutch supermajor Shell reported damage to its West Delta-143 offshore facility. The company said it is still attempting to establish the full extent of the damage and the degree to which its production will be affected.

UK supermajor BP also continues to assess the impact of Hurricane Ida on its offshore and onshore assets.

"Flyovers and 360-degree visual assessments of our four Gulf of Mexico platforms have been conducted. At this time, no obvious major damage has been observed," the company said in its latest update.

"Weather permitting, our team will assess habitability and provide a more comprehensive update of the platforms' statuses as safety permits. Production will remain shut-in until further confirmation is obtained, which indicates safe and reliable operations may resume. We cannot predict how long this process will take."

The company's onshore assets at Houma and Port Fourchon experienced the brunt of Hurricane Ida’s inland force with damage to both facilities that will require repairs, according to the company.

"In the interim, we will temporarily relocate our shore base and heliport to other locations. BP’s midstream and downstream assets are in various stages of start-up and await facility inspections and power restoration."