威利斯顿盆地的作业者大多在较浅的 Three Forks 上部台阶处发现了分支井。但北达科他州研究人员报告称，较深的 Three Forks 中部台阶处仍有数亿桶石油尚未开采。
巴肯页岩是北达科他州油田最受欢迎的目标——但专家警告不要忽视更深的三叉页岩层。
事实上，根据北达科他州矿产资源部门最近发布的两项研究显示，中部 Three Forks 油藏仍然蕴藏着数亿桶未开发的可采石油。
自 2006 年在北达科他州西部发现帕歇尔油田以来，石油和天然气生产商主要以中巴肯地层为目标，采用水平井进行开采。
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Williston Basin operators have mostly landed laterals in the shallower upper Three Forks bench. But the deeper middle Three Forks contains hundreds of millions of barrels of oil yet to be recovered, North Dakota state researchers report.
The Bakken Shale is the most popular target in North Dakota oil country—but experts caution not to count out the deeper Three Forks formation.
In fact, the middle Three Forks reservoir still contains hundreds of millions of barrels of undeveloped recoverable oil, according to two studies recently published by the North Dakota Department of Mineral Resources.
Oil and gas producers have primarily targeted the Middle Bakken formation with horizontal wells since the discovery of the Parshall Field in western North Dakota in 2006.
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