DAILYCALL Oil prices rose in Asian trade on Friday and were headed for a positive week as persistent concerns over a worsening Middle East conflict kept a risk premium largely in play. lsrael vowed to attack lran over an early-October strike, which kept traders on edge over an escalation in the conflict that could potentially disrupt supplies from the Middle East.Focus was also on U.S. attempts to broker a ceasefire, which so far appeared to have yielded few results,Brent oil futures expiring in December rose 0.4% to $74.70 a barrel, while West Texas Intermediate Crude futures rose 0.5% to $70.55 a barrel by 21:04 ET (01:04 GMT). Oil set for weekly gains.