The Williston Basin Bakken petroleum system is a giant continuous accumulation. The petroleum system is characterized by low-porosity and -permeability reservoirs, organic-rich source rocks, and regional hydrocarbon charge. Total Bakken Formation and Three Forks Formation production to June 2019 is 3.3 billion bbl (0.52 billion m3) and 4.8 tcf of gas (0.135 trillion m3) from 19,075 wells. Daily production is over 1 million bbl (160,000 m3) per day.The Bakken Formation regionally in the Williston Basin consists of four members: upper and lower organic-rich black shale, a middle member (silty dolostone or limestone to sandstone lithology), and a basal member recently named the Pronghorn. The Bakken Formation ranges in thickness from a wedge edge to more than 140 ft (42.6 m), with the thickest area in the Bakken located in northwest North Dakota, east of the Nesson anticline.The Three Forks is a silty dolostone throughout much of its stratigraphic interval. The Three Forks ranges in thickness from less than 25 ft to more than 250 ft (7.6–76.2 m) in the mapped area. Thickness patterns are controlled by paleostructural features such as the Poplar Dome and Nesson, Antelope, Cedar Creek, and Bottineau anticlines. Thinning and or truncation occurs over the crest of the highs, and thickening of strata occurs on the flanks of the highs. The Three Forks can be subdivided into three units (up to six by some authors). Most of the development activity in the Three Forks targets the upper Three Forks.

中文翻译：

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Bakken–三叉超级巨星，威利斯顿盆地

威利斯顿盆地巴肯的石油系统是一个巨大的连续积累。石油系统的特点是低孔隙度和渗透率的油藏，富含有机物的烃源岩和区域性烃类装料。截至2019年6月，Bakken地层和3个Fork地层的总产量为19,075口井，产量为33亿桶（5.2亿立方米），天然气产量为4.8 tcf（0.135万亿立方米）。日产量超过100万桶/日（160,000立方米）/天。威利斯顿盆地的Bakken组由四个部分组成：上部和下部富含有机质的黑色页岩，中间部分（粉质白云岩或石灰岩至砂岩岩性），以及最近有一个基础成员叫叉角羚。巴肯组的厚度范围从楔形边缘到140英尺（42.6 m）以上，巴肯最厚的地区位于北达科他州西北部，在三叠纪的大部分地层间隔中，它是粉质白云岩。在所映射的区域中，三个叉子的厚度范围从小于25英尺到大于250英尺（7.6–76.2 m）。厚度模式由诸如杨树穹顶和内森，羚羊，雪松溪和波蒂诺背斜等古构造特征控制。在高点的顶部发生变薄和/或截断，并且在高点的侧面发生地层的增厚。三把叉子可细分为三个单元（某些作者最多可分成六个单元）。三叉的大部分开发活动都针对上三叉。2 m）。厚度模式由诸如杨树穹顶和内森，羚羊，雪松溪和波蒂诺背斜等古构造特征控制。在高点的顶部发生变薄和/或截断，并且在高点的侧面发生地层的增厚。三把叉子可细分为三个单元（某些作者最多可分成六个单元）。三叉的大部分开发活动都针对上三叉。2 m）。厚度模式由诸如杨树穹顶和内森，羚羊，雪松溪和波蒂诺背斜等古构造特征控制。在高点的顶部发生变薄和/或截断，并且在高点的侧面发生地层的增厚。三把叉子可细分为三个单元（某些作者最多可分成六个单元）。三叉的大部分开发活动都针对上三叉。