...James P. Rogers Abstract Sleepy Hollow oil field, Red Willow County, Nebraska, discovered in 1960, has produced nearly 30 million bbl of oil from a “basal” Desmoinesian (Pennsylvanian) sandstone. The trap for this substantial oil accumulation is complex, related to (1) sandstone characteristics...

...James P. Rogers Abstract Sleepy Hollow field, Red Willow County, Nebraska, discovered in 1960, has produced more than 28 MMBO from a “basal” Pennsylvanian sandstone. The trap for this substantial oil accumulation is complex, related to sandstone characteristics and distribution, low-relief late...

...Gary S. Sandlin ABSTRACT The Sleepy Hollow field, on the southwest flank of the Cambridge arch, is a recently discovered oil field of major importance which produces from multiple pay zones at a relatively shallow depth. The oil accumulation is partly controlled by a structural nose, trending south...

..., and at least three of them were felt by local residents. Sixteen of the located events occurred in the immediate vicinity of the most productive oil field in Nebraska: the Sleepy Hollow Field. A mail canvass revealed a well-constrained “felt” area about 10 km across which coincides remarkably well with the oil...

...David G. Evans; Don W. Steeples Abstract Between April 1982 and June 1984, 311 earthquakes were detected, and 176 earthquakes were located in the vicinity of the Sleepy Hollow oil field, southwestern Nebraska. The oil field is being injected with water to enhance oil production, and the earthquakes...

...Fig. 12. —West-east cross section B-B′ through central part of Sleepy Hollow field. Upper section shows C zone of Lansing-Kansas City and lower section illustrates build-up of Sleepy Hollow basal sand. ...

...Figure 1. (A) Location of Sleepy Hollow field (SHF) on the southwestward limb of the Cambridge arch in Nebraska. (B) The SHF study area outlined by black rectangle. Well coverage is shown as black dots. Red boxes represent wells with core samples. Pink line represents well section. Blue box...

... in carbon-13 compared to the Lyons oil type (δ 13 C values –28.8 to –30.4 ppt). Oil produced from the Pennsylvanian (Missourian) Lansing Group (“F” zone) and Cambrian rocks at Boveau Canyon and Sleepy Hollow fields (Nebraska), respectively, is geochemically similar to this second oil type. The third oil...

... in carbon-13 compared to the Lyons oil type (δ 13 C values −28.8 to −30.4 ppt). Oil produced east of the Denver basin from rocks of the Lansing Group (“F” zone) and Ordovician rocks at Boveau Canyon and Sleepy Hollow fields, respectively, is geochemically similar to this second oil type. The third oil type...

... of the Sleepy Hollow field in Red Willow County, establishment of northernmost production in the Nebraska portion of the Denver basin at Scottsbluff County, and Lansing-Kansas City discoveries in Red Willow County between Ackman and the Silver Creek fields. Oil and gas production declined from 30,703,000...

... is presented in Table II . Both Colorado and Nebraska oil production increased in 1960, that in Nebraska being the highest in history. Increased figures in Nebraska are attributed to the successful development of Ackman (Lansing-Kansas City) and Sleepy Hollow (Lansing-Kansas City and “Reagan”) fields...

... dollar. The northward trend of discoveries in Nebraska should lead to an increase in exploratory drilling in Scottsbluff, Morrill, Box Butte, and Sioux Counties. The unsuccessful search for another Sleepy Hollow field has disillusioned many operators in the central Nebraska Pennsylvanian “play...

... the Nebraska and Colorado parts of the play. Secondary recovery is playing an increasing role in “D-J” production with several projects being inititated and feasibility studies being conducted on nearly every field. Lucrative production from the Basal Pennsylvanian Sand at Sleepy Hollow...