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Title: Cretaceous system stratigraphy and shallow gas resources on the Fort Peck reservation, northeastern Montana

Abstract

Five shallow gas-bearing Cretaceous intervals have been identified on the Fort Peck Reservation of northeastern Montana. They include the Lower Judith River Sandstone and shaly sandstone intervals in the Gammon, Niobrara, Greenhorn, and Mowry Formations, Stratigraphic correlations have been carried from southwestern Saskatchewan through the Bowdoin gas field to the reservation. Sparse yet widely distributed gas shows confirm this relatively untested resource. Each of these gas-bearing intervals belongs to a recognized stratigraphic cycle characterized by thick shales overlain by progradational shaly sandstones and siltstones. The bottom cycle (Skull Creek to Mowry) contains considerable nonmarine deposits, especially within the Muddy Sandstone interval, which is thickly developed in the eastern part of the reservation as a large valley-fill network. Some individual sandstone units are not continuous across the reservation. These, and those that correlate, appear to be related to paleotectonic features defined by northwest-trending lineament zones, and by lineament zone intersections. Northeast-trending paleotectonic elements exert secondary influence on stratigraphic isopachs. Circular tectonic elements, which carry through to basement, also have anomalous stratigraphic expression. Conventional drilling has not been conducive to properly testing the Cretaceous gas potential on the reservation, but empirical well-log analysis suggests that gas can be identified by various crossovermore » techniques. The Judith River Formation did produce gas for field use at East Poplar.« less

Authors:
;  [1]
  1. Fort Peck Tribes, Poplar, MT (United States)
Publication Date:
OSTI Identifier:
5788597
Report Number(s):
CONF-9107109-
Journal ID: ISSN 0149-1423; CODEN: AABUD
Resource Type:
Conference
Journal Name:
AAPG Bulletin (American Association of Petroleum Geologists); (United States)
Additional Journal Information:
Journal Volume: 75:6; Conference: American Association of Petroleum Geologists (AAPG) Rocky Mountain Section meeting, Billings, MT (United States), 28-31 Jul 1991; Journal ID: ISSN 0149-1423
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; MONTANA; PETROLEUM DEPOSITS; FRACTURED RESERVOIRS; PETROLEUM GEOLOGY; GEOLOGIC FORMATIONS; GEOLOGIC FRACTURES; GEOPRESSURED SYSTEMS; MATURATION; POROSITY; RESERVOIR ROCK; RESISTIVITY LOGGING; STRATIGRAPHY; DEVELOPED COUNTRIES; ELECTRIC LOGGING; FEDERAL REGION VIII; GEOLOGIC DEPOSITS; GEOLOGIC STRUCTURES; GEOLOGY; MINERAL RESOURCES; NORTH AMERICA; RESOURCES; USA; WELL LOGGING; 020200* - Petroleum- Reserves, Geology, & Exploration

Citation Formats

Monson, L M, and Lund, D F. Cretaceous system stratigraphy and shallow gas resources on the Fort Peck reservation, northeastern Montana. United States: N. p., 1991. Web.
Monson, L M, & Lund, D F. Cretaceous system stratigraphy and shallow gas resources on the Fort Peck reservation, northeastern Montana. United States.
Monson, L M, and Lund, D F. 1991. "Cretaceous system stratigraphy and shallow gas resources on the Fort Peck reservation, northeastern Montana". United States.
@article{osti_5788597,
title = {Cretaceous system stratigraphy and shallow gas resources on the Fort Peck reservation, northeastern Montana},
author = {Monson, L M and Lund, D F},
abstractNote = {Five shallow gas-bearing Cretaceous intervals have been identified on the Fort Peck Reservation of northeastern Montana. They include the Lower Judith River Sandstone and shaly sandstone intervals in the Gammon, Niobrara, Greenhorn, and Mowry Formations, Stratigraphic correlations have been carried from southwestern Saskatchewan through the Bowdoin gas field to the reservation. Sparse yet widely distributed gas shows confirm this relatively untested resource. Each of these gas-bearing intervals belongs to a recognized stratigraphic cycle characterized by thick shales overlain by progradational shaly sandstones and siltstones. The bottom cycle (Skull Creek to Mowry) contains considerable nonmarine deposits, especially within the Muddy Sandstone interval, which is thickly developed in the eastern part of the reservation as a large valley-fill network. Some individual sandstone units are not continuous across the reservation. These, and those that correlate, appear to be related to paleotectonic features defined by northwest-trending lineament zones, and by lineament zone intersections. Northeast-trending paleotectonic elements exert secondary influence on stratigraphic isopachs. Circular tectonic elements, which carry through to basement, also have anomalous stratigraphic expression. Conventional drilling has not been conducive to properly testing the Cretaceous gas potential on the reservation, but empirical well-log analysis suggests that gas can be identified by various crossover techniques. The Judith River Formation did produce gas for field use at East Poplar.},
doi = {},
url = {https://www.osti.gov/biblio/5788597}, journal = {AAPG Bulletin (American Association of Petroleum Geologists); (United States)},
issn = {0149-1423},
number = ,
volume = 75:6,
place = {United States},
year = {Sat Jun 01 00:00:00 EDT 1991},
month = {Sat Jun 01 00:00:00 EDT 1991}
}

Conference:
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