WAfrica Crude-Nigerian steady to weaker

* Nigerian Qua Iboe valued at dated plus $2 or less * Demand lull weighs on sentiment * Forcados, Bonny exports delayed LONDON, Oct 23 (Reuters) - Nigerian crude oil premiums remained under pressure on Tuesday due to lacklustre demand from big buyers China and India, although export delays affecting the Bonny and Forcados crude streams could provide support. On Monday, Shell said its Nigerian venture had declared force majeure on exports of the Bonny and Forcados crudes. Traders Read Full Story