West African crude differentials weakened sharply in July as subdued buying interest from Asian refiners and competition from other Atlantic Basin supplies left Nigerian cargoes struggling to find buyers, according to OPEC
The deterioration was most pronounced for Nigerian grades, with Forcados’ differential to North Sea Dated falling $4.24 a barrel month-on-month, while Bonny Light declined $3.25 and Qua Iboe dropped $3.13, OPEC said in its August 2026 Monthly Oil Market Report.
The three grades ended July at premiums of just 5 cents, 8 cents and 1 cent a barrel, respectively, to North Sea Dated.
The weaker differentials point to softer demand for West African barrels in a market where buyers had more alternatives, particularly from other Atlantic Basin suppliers.
Nigerian Cargoes Build Up
OPEC said an overhang of unsold Nigerian cargoes persisted late into the trading cycle, indicating that sellers faced difficulty placing available barrels at stronger prices.
The combination of weaker Asian buying and greater competition from alternative Atlantic Basin crude put pressure on West African grades, the report said.
The development is significant for Nigeria, where crude exports remain a major source of foreign-exchange earnings and government revenue.
However, the weakness was not uniform across the global crude market. OPEC said crude differentials moved differently across regions during July, with some grades benefiting from supply disruptions and strong refinery demand.
The decline in West African crude differentials was partly moderated by renewed concerns over Middle Eastern supply.
Those concerns prompted some Asian refiners to assess alternative sources of crude, potentially creating additional demand for West African barrels.
OPEC said the renewed interest came as Asian refiners considered replacement options amid concerns about Middle Eastern supplies. That support, however, was not enough to prevent the sharp monthly declines in Nigerian crude differentials.
The weakness extended beyond Nigeria. Cabinda crude, a major Angolan grade, saw its differential fall $5.43 a barrel in July, leaving it at a $7.82-a-barrel discount to North Sea Dated.
The broader West and North African basket also declined. OPEC said the basket’s components, including Bonny Light, Djeno, Es Sider, Rabi Light, Saharan Blend and Zafiro, fell by an average of $2.81 a barrel month-on-month to $82.50 in July.
Atlantic Supply Weighs on West Africa
The pressure on West African grades came as Atlantic Basin crude remained relatively well supplied.
OPEC said ample availability of light sweet crude, supported by US exports, combined with softer Asian buying interest to pressure crude differentials. At the same time, demand for medium-sour grades east of the Suez Canal remained relatively firm.
US crude was also attracting interest from European refiners seeking alternatives to CPC Blend and from Asian buyers, although abundant US and other Atlantic Basin supplies limited the upside in differentials.
This increases competition for West African producers seeking Asian buyers, particularly when refiners can source alternative crude from other Atlantic Basin suppliers.
Crude Prices Also Fell
The weakening of West African differentials occurred against a broader decline in crude prices during July.
OPEC’s Reference Basket fell $6.76 a barrel from June to average $82.99, while North Sea Dated declined $1.78 to $83.39 a barrel.
OPEC attributed the broader decline partly to expectations of improved crude availability and higher Middle Eastern exports early in July. Crude prices later rebounded as renewed Middle Eastern tensions raised concerns about supply disruptions before falling again at the end of the month as geopolitical tensions eased.
For West African producers, the combination of weaker benchmark prices, softer Asian buying and greater competition from Atlantic Basin suppliers created additional pressure on the value of exported crude.
The report suggests that West African sellers entered August facing a more competitive market for their barrels, although renewed concerns about Middle Eastern supply could provide some support if Asian refiners continue seeking alternative sources.
