Oil prices rose slightly on Friday after the US put greater economic pressure on Venezuelan oil shipments and carried out airstrikes against Islamic State militants in northwest Nigeria at the request of the government in Abuja. Brent crude futures rose 6 cents, or 0.1%, to $62.30 per barrel at 0456 GMT. US West Texas Intermediate (WTI) crude was also up 6 cents at $58.41. Both Venezuela