据世界石油9月8日华盛顿报道，根据美国能源信息署(EIA)最新的钻井生产率报告，2021年7月，美国所有DPR地区有5957口已钻但未完井(DUC)，是自2017年11月以来的最低水平。美国大部分陆上产油区，尤其是二叠纪地区，DUC的下降反映了更多的完井作业，与此同时，新井钻井活动减少。随着更多井的完工，二叠纪地区的石油产量增加，但DUC库存减少，这可能会限制美国未来几个月的石油产量增长。
使水平钻井、水力压裂井上线的两个主要阶段是钻井和完井。钻井阶段包括派遣钻机和工作人员，然后在一个平台上钻一口或多口井。下一阶段是完井，通常由单独的工作人员完成，包括套管、固井、射孔和生产所需的水力压裂。一般来说，钻井和完井阶段之间的时间间隔为几个月，这导致了大量的DUC库存，生产商可以将其作为工作库存来管理石油生产。
在美国五大产油区中，鹰福特(Eagle Ford)、巴肯(Bakken)和奈厄布拉勒 (Niobrara)地区的DUC降至2013年12月以来的最低水平，二叠纪和阿纳达科地区的DUC降至2018年6月以来的最低水平。尽管在二叠纪地区，随着完井率的增加，DUC显著减少，但其他地区的钻井和完井数量仍处于历史低位。
美国新钻井的指标依然低迷。截至9月3日，贝克休斯的活跃钻机数量为394台。尽管这一数字比去年增加了181台，但与原油期货价格接近(或更低)的其他时期相比，这一数字处于历史低点。钻机数量的增加通常滞后于原油价格的上涨4到6个月。如果钻井活动没有增加，那么完井和生产可能会受到限制，因为DUC库存会继续下降。
裘寅 编译自 世界石油
原文如下：
EIA reports sharp decline in drilled but uncompleted shale well count
based U.S. Energy Information Administration’s latest Drilling Productivity Report, 5,957 drilled but uncompleted wells (DUCs) were in the United States in all DPR regions in July 2021, the lowest for any month since November 2017. The decline in DUCs in most major U.S. align="justify"> The two main stages in bringing a horizontally drilled, hydraulically fractured well align="justify"> Of the five major U.S. oil-producing regions, DUCs in the Eagle Ford, Bakken, and Niobrara regions have declined to their lowest levels since December 2013, and DUCs in the Permian and Anadarko regions have declined to their lowest levels since June 2018. Although this significant reduction in DUCs follows an increasing rate of well completions in the Permian region, both the number of wells drilled and the number of wells completed in all other regions remain at historically low levels.
Indicators of new well drilling in the United States remain subdued. As of September 3, the Baker Hughes active oil rig count was 394 rigs. Although that figure is up 181 rigs from last year, the number is historically low compared with other periods when crude oil futures prices were near similar levels (or at even lower prices). Rising rig counts typically lag four to six months behind a crude oil price increase. If drilling activity doesn’t increase, then well completions and production may be limited because the inventory of DUCs continues to fall.
