By Scott DiSavino

June 30 (Reuters) - Oil prices were little changed on Tuesday but were headed for their biggest monthly and quarterly losses since the COVID-19 pandemic in early 2020, with investors eyeing potential U.S.-Iran talks in Doha amid a strained interim ceasefire in the four-month-old war.

Brent futures ‌rose 3 cents to $73.18 a barrel at 10:51 a.m. EDT (1451 GMT), while U.S. West Texas Intermediate (WTI) crude fell 30 cents, or 0.4%, to $70.45 a ‌barrel.

Both crude benchmarks were close to where they were trading on February 27, the day before the start of the U.S.-Israeli war on Iran, when Brent closed at $72.48 a barrel and WTI closed at $67.02.

"I wouldn't ​say the market has priced out a risk premium, but previously stranded ships have become available with the increase in ships moving out of the Gulf, creating a temporary wave of new supply," UBS analyst Giovanni Staunovo said.

Morgan Stanley said it now models an implied global oil market surplus of 4.8 million barrels per day in 2027.

Top U.S. envoys who have arrived in Doha will not hold a high-level meeting with Iran, a Qatari official said on Tuesday, casting doubt on the progress of efforts to bring a lasting ‌halt to the Iran war and fully reopen the ⁠Strait of Hormuz. About 20% of global oil supplies passed through the strait before the Iran war.

Instead, there will be technical talks this week on issues including regional security that could later be elevated to senior level, Qatar's Foreign Ministry spokesperson Majed Al Ansari ⁠told a media briefing.

The arrival of U.S. President Donald Trump's son-in-law Jared Kushner and envoy Steve Witkoff in Doha on Tuesday followed exchanges of fire over the weekend that tested the June 17 interim accord between the United States and Iran.

The 14-point pact allowed 60 days for the two sides to negotiate a permanent truce in the conflict and to resolve thorny ​issues ​including the future of Iran's nuclear programme.

FUTURES MILESTONES:

Tuesday's lack of price movement kept both crude benchmarks ​in technically oversold territory with Brent for 13 days in a ‌row and WTI for 11 days in a row.

The premium of futures for Brent over WTI fell to $2.14 a barrel, its lowest since May 2022. Analysts have said that when Brent's premium over WTI falls below roughly $4 a barrel, it does not make economic sense for energy firms to send ships across the ocean to pick up U.S. crude, which should result in lower U.S. exports.

For the month, Brent was down about 21% in June after dropping about 19% in May. That would be its biggest monthly decline since falling by a record 55% in March 2020 due to COVID demand destruction.

For the quarter, Brent was down about 38% in the second quarter ‌after soaring 94% in the first quarter. That would be its biggest quarterly decline since ​falling by a record 66% in the first quarter of 2020. Last quarter's 94% gain was the ​highest since futures soared by a record 142% in the third quarter ​of 1990.

Supply of the five North Sea crude oil grades underpinning the dated Brent benchmark in August will not include Brent crude ‌for the first time since at least 2021.

U.S. OIL INVENTORIES:

The oil ​market awaited weekly storage reports from the American ​Petroleum Institute (API) trade group later on Tuesday and the U.S. Energy Information Administration (EIA) on Wednesday.

Analysts estimated energy firms pulled 4.1 million barrels of crude from storage during the week ended June 26.

If correct, that would be the first time energy firms pulled crude out of storage for 10 weeks in a ​row, tying a record set in January 2018. It compares ‌with an increase of 3.8 million barrels in the same week last year and an average decline of 5.5 million barrels over the past ​five years (2021 to 2025). [EIA/S] [API/S]

(Reporting by Scott DiSavino in New York, Robert Harvey in London, Anushree Mukherjee and Pranav Mathur in Bengaluru and Trixie ​Yap in Singapore; Editing by Alex Lawler, Susan Fenton, Jan Harvey and Chizu Nomiyama )