Oil prices rose on Wednesday after several days of decline, affected by falling US crude inventories.Brent crude futures for September rose 37 cents, or 0.5%, to $81.38 a barrel. US West Texas Intermediate crude for September increased 38 cents, or 0.5%, to $77.34 per barrel.US crude oil, gasoline and distillate inventories fell last week, according to market sources citing the American Petroleum Institute, a trade organization.Oil prices fell to a six-week low on Tuesday.Source: Qatar News Agency