US Oil Stocks Unexpectedly Rise as Refineries Slow Down

US crude oil reserves increased unexpectedly due to a significant slowdown in refinery activity, according to the US Energy Information Administration (EIA).

Share:

Comprehensive energy news coverage, updated nonstop

Annual subscription

8.25$/month*

*billed annually at 99$/year for the first year then 149,00$/year ​

Unlimited access • Archives included • Professional invoice

OTHER ACCESS OPTIONS

Monthly subscription

Unlimited access • Archives included

5.2$/month*
then 14.90$ per month thereafter

FREE ACCOUNT

3 articles offered per month

FREE

*Prices are excluding VAT, which may vary depending on your location or professional status

Since 2021: 35,000 articles • 150+ analyses per week

US commercial crude oil stocks recorded a rise of 3.9 million barrels during the week ending September 27, exceeding analysts’ expectations, who had anticipated a decline of 1.4 million barrels. This unexpected increase contrasts with the consensus established by Bloomberg and reflects a notable shift in the American energy sector.

This rise in inventories is primarily attributed to the slowdown in US refinery activity. Refining facilities operated at 87.6% of their capacity last week, compared to 90.9% the previous week, indicating the lowest utilization rate in five months. This deceleration is largely due to the oil companies entering their annual maintenance period, a common practice in October and February when demand is traditionally lower.

The reduction in refinery activity should theoretically lead to a decrease in refined product inventories. However, the stocks increased due to a drop in demand. The volumes of refined products delivered to the US market, an implicit indicator of demand, fell by 7% over a week. This decline was particularly pronounced for gasoline (-7%), distillates including diesel (-10%), and the propane and propylene category (-34%), largely destined for heavy industry.

Impact on the Oil Market

US gasoline stocks increased by 1.1 million barrels, while analysts had expected a more modest rise of 200,000 barrels. This increase exceeds expectations and could influence oil prices in the international market. In addition to the reduced activity of refineries, the rise in crude stocks can also be explained by a slight increase in imports (+2.7%), while exports remained relatively stable (-0.5%).

US crude oil production has reached its historic record level of 13.3 million barrels per day, compared to 13.2 million during the previous period. This recovery in production also contributes to the increase in stocks, despite a declining demand. The report from the US Energy Information Administration (EIA) had a significant impact on the market, which had been in a strong upward trend following the Iranian attack on Israel on Tuesday.

At 15:15 GMT, the price of West Texas Intermediate (WTI) for November delivery was up only 1.33%, reaching $70.76, after having risen by as much as 3.80% earlier in the day. This price volatility reflects the current uncertainties in the global oil market.

Outlook and Analysis

Matt Smith, an analyst at Kpler, explains that the refinery slowdown is an expected response to the maintenance season. “In October and February, refiners take advantage of a period of weaker demand to perform maintenance and repairs on their facilities,” he notes. This strategy helps maintain the operational efficiency of refineries while adjusting production according to seasonal demand fluctuations.

The decline in demand for refined products, especially gasoline and diesel, could also be linked to broader economic factors, such as slowdowns in certain industrial sectors or changes in consumer consumption habits. These dynamics will need to be closely monitored to anticipate future trends in the oil market.

Consequences for the US Economy

The increase in crude oil stocks and the drop in demand for refined products can have several repercussions on the US economy. On the one hand, higher stocks may put downward pressure on oil prices, which could benefit consumers by reducing the cost of gasoline and other derived products. On the other hand, a prolonged decline in demand could impact the profitability of refineries and potentially lead to adjustments in production operations.

The EIA report also highlights the importance of energy market stability for the overall economy. Effective stock management and quick adaptation of production and refining capacities are essential to respond to demand fluctuations and maintain market balance.

Reactions from Sector Players

Companies in the oil sector are closely monitoring these developments. Some may consider strategic adjustments to optimize their production and distribution based on new stock and demand data. Moreover, investments in refining infrastructure could be influenced by current trends, with a particular focus on operational efficiency and flexibility.

Additionally, national and international energy policies could be impacted by these market movements. Policymakers will need to evaluate the economic and environmental implications of these changes to develop strategies aimed at ensuring the resilience and sustainability of the energy sector.

The French group will supply carbon steel pipelines to TechnipFMC for the offshore Orca project, strengthening its strategic position in the Brazilian market.
The American oil major saw its revenue decline in the third quarter, affected by lower crude prices and refining margins, despite record volumes in Guyana and the Permian Basin.
Gabon strengthens its oil ambitions by partnering with BP and ExxonMobil to relaunch deep offshore exploration, as nearly 70% of its subsea domain remains unexplored.
Sofia temporarily restricts diesel and jet fuel exports to safeguard domestic supply following US sanctions targeting Lukoil, the country’s leading oil operator.
Swiss trader Gunvor will acquire Lukoil’s African stakes as the Russian company retreats in response to new US sanctions targeting its overseas operations.
An agreement between Transpetro, Petrobras and the government of Amapá provides for the construction of an industrial complex dedicated to oil and gas, consolidating the state's strategic position on the Equatorial Margin.
The US company reported adjusted earnings of $1.02bn between July and September, supported by the refining and chemicals segments despite a drop in net income due to exceptional charges.
The Spanish oil group reported a net profit of €1.18bn over the first nine months of 2025, hit by unstable markets, falling oil prices and a merger that increased its debt.
The British group’s net profit rose 24% in Q3 to $5.32bn, supporting a new share repurchase programme despite continued pressure on crude prices.
Third-quarter results show strong resilience from European majors, supported by improved margins, increased production and extended share buyback programmes.
Driven by industrial demand and production innovations, the global petrochemicals market is projected to grow by 5.5% annually until 2034, reaching a valuation of $794 billion.
CNOOC Limited announced continued growth in oil and gas production, reaching 578.3 million barrels of oil equivalent, while maintaining cost control despite a 14.6% drop in Brent prices.
Oil sands production in Canada continued to grow in 2024, but absolute greenhouse gas emissions increased by less than 1%, according to new industry data.
Argentina seeks to overturn a U.S. court ruling ordering it to pay $16.1bn to two YPF shareholders after the 2012 partial expropriation of the oil group.
The United States has issued a general license allowing transactions with two German subsidiaries of Rosneft, giving Berlin until April 2026 to resolve their ownership status.
An independent report estimates 13.03 billion barrels of potential oil resources in Greenland’s Jameson Land Basin, placing the site among the largest undeveloped fields globally.
Impacted by falling oil prices and weak fuel sales, Sinopec reports a sharp decline in profitability over the first three quarters, with a strategic shift toward higher-margin products.
Citizen Energy Ventures enters the private placement market with a $20mn fund to develop eight wells in the Cherokee Formation of Oklahoma’s historic Anadarko Basin.
US crude stocks dropped by 6.9 million barrels, defying forecasts, amid a sharp decline in imports and a weekly statistical adjustment by the Energy Information Administration.
Lukoil has started divesting its foreign assets following new US oil sanctions, a move that could reshape its overseas presence and impact supply in key European markets.

All the latest energy news, all the time

Annual subscription

8.25$/month*

*billed annually at 99$/year for the first year then 149,00$/year ​

Unlimited access - Archives included - Pro invoice

Monthly subscription

Unlimited access • Archives included

5.2$/month*
then 14.90$ per month thereafter

*Prices shown are exclusive of VAT, which may vary according to your location or professional status.

Since 2021: 30,000 articles - +150 analyses/week.