Nigerian crude differentials were expected on Wednesday to edge down due to ample supply of light, sweet crude.
Qua Iboe was last on offer at dated Brent plus $1.65 for mid-August loading, plus $1.80 for end-August and plus $2.00 for September, with tradeable levels somewhat lower.
Not all of the Nigerian programmes for September have emerged. Forcados, for one, has yet to appear.
Source: Reuters