美国西海岸的柴油差价大幅下降

据普氏能源资讯7月18日报道，自夏季开始以来，美国西海岸的柴油差价已大幅下降，因为库存和炼油厂利用率已从春季维护季节恢复。

周三，洛杉矶的加州级柴油在纽约商品交易所(Nymex)8月超低硫柴油(ULSD)加2美分/加仑的价格进行了评估，这是自6月20日期货价格持平以来的最低价格。该评级是在前一个月期货加上5月7日38美分/加仑的水平上评估的，这是自2011年11月以来的最高水平。

根据普氏分析的数据显示，西海岸炼油厂维护在截至3月29日的一周达到顶峰，当时蒸馏产能约为342万桶/日，而本周的预计产能仅为145万桶/日。

根据能源信息管理局(Energy Information Administration )周三公布的数据显示，炼油厂的利用率在7月12日结束的一周达到95.3%,从三月底到五月底，炼厂产能利用率停滞在90％以下，时间当差已经飙升。

随着炼厂重新上线，碳水化合物-柴油的供应增加。据加州能源委员会的最新数据显示，截至7月5日的这一周，中质产品的产品产量提高了22.7%，达到了145.7万桶。

圣弗朗西斯科普通碳水化合物柴油周三在8月份的商品期货加6美分/加仑的价格上进行了评估，这是自6月27日以来的最低价格。

供应增加并不仅仅是加利福尼亚州。根据EIA数据显示，美国西海岸超低硫柴油库存较上周上涨100万桶至1248.1万桶。 从4月底到5月底，库存仍然低于1200万桶。

在波特兰柴油成本是八月期货加6.50美分/加仑，自6月21日的最低水平。

郝芬 译自 Platts

原文如下：

US West Coast diesel differentials decline after spring peak

US West Coast diesel differentials have fallen dramatically since summer began as stocks and refinery utilization percentages have recovered from the spring maintenance season.

California-grade diesel in Los Angeles was assessed Wednesday at NYMEX August ULSD plus 2 cents/gal, its lowest price since it was flat to futures on June 20. The grade was assessed at front-month futures plus 38 cents/gal May 7, its highest level since November 2011.

West Coast refinery maintenance peaked in the week ended March 29 when about 3.42 million b/d of distillation capacity was under work, compared to just 1.45 million b/d of expected capacity for this week, according to Platts Analytics.

Refinery utilization finished the week ended July 12 at 95.3%, according to Energy Information Administration data published Wednesday. From late March to late May, refinery utilization stagnated below 90%, the time when the differentials had spiked.

As refineries came back online, CARB-diesel supply increased. Production for the week ended July 5 rose 22.7% on the week to 1.457 million barrels, according to the latest California Energy Commission data.

San Francisco CARB-diesel was assessed Wednesday at August futures plus 6 cents/gal, the lowest price since June 27.

The supply increase has not been isolated to just California. Total West Coast ULSD stocks rose 1 million barrels last week to 12.481 million barrels, EIA data showed. From the end of April to the end of May, stocks remained under 12 million barrels.

Diesel costs in Portland were August futures plus 6.50 cents/gal, the lowest level since June 21.