Saudi Arabia is shifting more crude loadings to Gulf ports as Yanbu constraints grow, increasing exposure to the Strait of Hormuz, Kpler said in a Tuesday note.
Saudi Arabia has gradually increased Gulf of Oman shuttle operations after the late-July Houthi blockade targeted Saudi-linked vessels in the Red Sea, said Homayoun Falakshahi, head of crude oil analysis at Kpler.
At least 12 very large crude carriers with established shuttle-trade histories have called at Saudi Arabia's Middle East Gulf ports, signaling a broader shift from Yanbu exports.
Higher shuttle activity has reduced vessel utilization from 2.5 voyages per month during the memorandum of understanding period to about 1.7 currently.
At current utilization, each additional VLCC adds about 110,000 barrels per day to 130,000 b/d of export capacity. Redirecting 3 million b/d would require about 25 vessels.
Saudi Arabia's national tanker operator Bahri controls about 50 VLCCs and could quickly add capacity, with 17 vessels currently ballasting in the Gulf of Oman, Kpler said.
Bahri vessels have largely avoided the Red Sea since a Saudi-linked ship came under attack, instead positioning in the Gulf of Oman.
A voyage from Sohar to Ras Tanura takes about 1.5 days at 12 knots, allowing Bahri to quickly move suitable vessels into Middle East Gulf shuttle trades, Kpler said.
South Korea's Sinokor provides an even larger pool, with more than 127 VLCCs and about 40% of its fleet already active in Middle East Gulf trades.
Kpler said there may be a practical limit to the share of an operator's fleet allocated to higher-risk Middle East Gulf operations.
However, the higher earnings on Middle East Gulf routes could encourage more operators to commit vessels despite the operational risks.
Benchmark Middle East Gulf earnings stand at about $1 million per day, offering a premium of roughly $0.4 million per day over Gulf of Oman trades, Kpler said.
Kpler said vessel availability poses less of a constraint than the risks tied to higher Strait of Hormuz traffic as Saudi Arabia expands Middle East Gulf loadings.
More Hormuz traffic could give Iran greater leverage over flows, while narrower shipping routes may limit flexibility and heavier ship-to-ship activity could strain Gulf of Oman lightering capacity.