Oil prices returned to pre - katrina levels yesterday as production in the gulf of mexico slowly began to recover and the market responded to the release of emergency stocks of oil and petrol 油价昨天回到了卡特里娜飓风袭击前的水平,因为墨西哥湾地区的生产开始缓慢恢复,市场对紧急石油和汽油储备的释放做出了回应。