LM Otero/AP Goldman Sachs said Tuesday that geopolitical risks to the oil market have continued to intensify. The bank estimates that a 500,000 bpd outage for three months (or a 250,000 bpd outage for six months) would increase Brent spot prices by $2.50 per barrel. It’s been a long time since geopolitical developments caused major movements in the oil price, but the escalating tension between the U.S.