Aramco declined to comment on the status of the rigs or the project.

The pullback marks a rare pause in Aramco’s efforts to drill wells, discover fields and expand known deposits to replace the barrels it’s pumping from the planet’s largest conventional oil reserves. The halts also raise questions about the kingdom’s supply of natural gas, much of which is found in crude reservoirs. Saudi Arabia needs gas to generate electricity and make chemicals.

Oil producers worldwide are slashing spending and putting projects on hold as the plunge in prices since last year imperils profits. Major suppliers, including the Saudis, are curbing output in response to the pandemic. Although prices for benchmark Brent crude have more than doubled since late April, demand is returning only slowly and risks of a second wave of infections persist.

Dubai-based Shelf Drilling Ltd. said Monday that operations at an offshore rig contracted to Aramco would be suspended at the client’s request for as long as a year. Another contractor, London-based Noble Corp., said last month that one of its rigs at the Marjan field in the Persian Gulf would stop work for a year, beginning in mid-May.

Aramco is delaying a project to expand oil and gas output at the Marjan and Berri fields for a period of six months to a year, said the people with knowledge, who asked not to be identified while discussing private matters.

The planned expansion would increase oil-production capacity at the fields by 550,000 barrels a day, to a combined 1.35 million, according to the International Energy Agency. The project would also boost gas flows by 2.5 billion standard cubic feet a day, sending gas by pipeline from Marjan to an onshore processing plant at Berri for domestic use.