Temperatures and interval geothermal-gradient determinations from wells in National Petroleum Reserve in Alaska
Temperature and related records from 28 wells in the National Petroleum Reserve in Alaska (NPRA) although somewhat constrained from accuracy by data gathering methods, extrapolate to undisturbed formation temperatures at specific depths below permafrost, and lead to calculated geothermal graidents b...
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ftosti:oai:osti.gov:5659891 2023-07-30T04:06:19+02:00 Temperatures and interval geothermal-gradient determinations from wells in National Petroleum Reserve in Alaska Blanchard, D.C. Tailleur, I.L. 2015-03-09 application/pdf http://www.osti.gov/servlets/purl/5659891 https://www.osti.gov/biblio/5659891 https://doi.org/10.2172/5659891 unknown http://www.osti.gov/servlets/purl/5659891 https://www.osti.gov/biblio/5659891 https://doi.org/10.2172/5659891 doi:10.2172/5659891 02 PETROLEUM 15 GEOTHERMAL ENERGY ALASKA GEOTHERMAL GRADIENTS PETROLEUM DEPOSITS OIL WELLS DRILL STEM TESTING EXPERIMENTAL DATA WELL LOGGING DATA FEDERAL REGION X GEOLOGIC DEPOSITS INFORMATION MINERAL RESOURCES NORTH AMERICA NUMERICAL DATA RESOURCES TEMPERATURE GRADIENTS TESTING USA WELLS 2015 ftosti https://doi.org/10.2172/5659891 2023-07-11T10:41:34Z Temperature and related records from 28 wells in the National Petroleum Reserve in Alaska (NPRA) although somewhat constrained from accuracy by data gathering methods, extrapolate to undisturbed formation temperatures at specific depths below permafrost, and lead to calculated geothermal graidents between these depths. Tabulation of the results show that extrapolated undisturbed temperatures range from a minimum of 98/sup 0/F (37/sup 0/C) at 4000 feet (1220 m) to a maximum of 420/sup 0/F (216/sup 0/C) at 20,260 feet (6177 m) and that geothermal gradients range from 0.34/sup 0/F/100' (6/sup 0/C/km) between 4470 feet to 7975 feet (Lisburne No. 1) and 3.15/sup 0/F/100' (57/sup 0/C/km) between 6830 feet to 7940 feet (Drew Point No. 1). Essential information needed for extrapolations consists of: time-sequential bottom-hole temperatures during wire-line logging of intermediate and deep intervals of the borehole; the times that circulating drilling fluids had disturbed the formations; and the subsequent times that non-circulating drilling fluids had been in contact with the formation. In several wells presumed near direct measures of rock temperatures recorded from formation fluids recovered by drill stem tests (DST) across thin (approx. 10-20 foot) intervals are made available. We believe that the results approach actual values close enough to serve as approximations of the thermal regimes in appropriate future investigations. Continuous temperature logs obtained at the start and end of final logging operations, conductivity measurements, and relatively long-term measurements of the recovery from disturbance at shallow depths in many of the wells will permit refinements of our values and provide determination of temperatures at other depths. 4 references, 6 figures, 3 tables. Other/Unknown Material permafrost Alaska SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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topic |
02 PETROLEUM 15 GEOTHERMAL ENERGY ALASKA GEOTHERMAL GRADIENTS PETROLEUM DEPOSITS OIL WELLS DRILL STEM TESTING EXPERIMENTAL DATA WELL LOGGING DATA FEDERAL REGION X GEOLOGIC DEPOSITS INFORMATION MINERAL RESOURCES NORTH AMERICA NUMERICAL DATA RESOURCES TEMPERATURE GRADIENTS TESTING USA WELLS |
spellingShingle |
02 PETROLEUM 15 GEOTHERMAL ENERGY ALASKA GEOTHERMAL GRADIENTS PETROLEUM DEPOSITS OIL WELLS DRILL STEM TESTING EXPERIMENTAL DATA WELL LOGGING DATA FEDERAL REGION X GEOLOGIC DEPOSITS INFORMATION MINERAL RESOURCES NORTH AMERICA NUMERICAL DATA RESOURCES TEMPERATURE GRADIENTS TESTING USA WELLS Blanchard, D.C. Tailleur, I.L. Temperatures and interval geothermal-gradient determinations from wells in National Petroleum Reserve in Alaska |
topic_facet |
02 PETROLEUM 15 GEOTHERMAL ENERGY ALASKA GEOTHERMAL GRADIENTS PETROLEUM DEPOSITS OIL WELLS DRILL STEM TESTING EXPERIMENTAL DATA WELL LOGGING DATA FEDERAL REGION X GEOLOGIC DEPOSITS INFORMATION MINERAL RESOURCES NORTH AMERICA NUMERICAL DATA RESOURCES TEMPERATURE GRADIENTS TESTING USA WELLS |
description |
Temperature and related records from 28 wells in the National Petroleum Reserve in Alaska (NPRA) although somewhat constrained from accuracy by data gathering methods, extrapolate to undisturbed formation temperatures at specific depths below permafrost, and lead to calculated geothermal graidents between these depths. Tabulation of the results show that extrapolated undisturbed temperatures range from a minimum of 98/sup 0/F (37/sup 0/C) at 4000 feet (1220 m) to a maximum of 420/sup 0/F (216/sup 0/C) at 20,260 feet (6177 m) and that geothermal gradients range from 0.34/sup 0/F/100' (6/sup 0/C/km) between 4470 feet to 7975 feet (Lisburne No. 1) and 3.15/sup 0/F/100' (57/sup 0/C/km) between 6830 feet to 7940 feet (Drew Point No. 1). Essential information needed for extrapolations consists of: time-sequential bottom-hole temperatures during wire-line logging of intermediate and deep intervals of the borehole; the times that circulating drilling fluids had disturbed the formations; and the subsequent times that non-circulating drilling fluids had been in contact with the formation. In several wells presumed near direct measures of rock temperatures recorded from formation fluids recovered by drill stem tests (DST) across thin (approx. 10-20 foot) intervals are made available. We believe that the results approach actual values close enough to serve as approximations of the thermal regimes in appropriate future investigations. Continuous temperature logs obtained at the start and end of final logging operations, conductivity measurements, and relatively long-term measurements of the recovery from disturbance at shallow depths in many of the wells will permit refinements of our values and provide determination of temperatures at other depths. 4 references, 6 figures, 3 tables. |
author |
Blanchard, D.C. Tailleur, I.L. |
author_facet |
Blanchard, D.C. Tailleur, I.L. |
author_sort |
Blanchard, D.C. |
title |
Temperatures and interval geothermal-gradient determinations from wells in National Petroleum Reserve in Alaska |
title_short |
Temperatures and interval geothermal-gradient determinations from wells in National Petroleum Reserve in Alaska |
title_full |
Temperatures and interval geothermal-gradient determinations from wells in National Petroleum Reserve in Alaska |
title_fullStr |
Temperatures and interval geothermal-gradient determinations from wells in National Petroleum Reserve in Alaska |
title_full_unstemmed |
Temperatures and interval geothermal-gradient determinations from wells in National Petroleum Reserve in Alaska |
title_sort |
temperatures and interval geothermal-gradient determinations from wells in national petroleum reserve in alaska |
publishDate |
2015 |
url |
http://www.osti.gov/servlets/purl/5659891 https://www.osti.gov/biblio/5659891 https://doi.org/10.2172/5659891 |
genre |
permafrost Alaska |
genre_facet |
permafrost Alaska |
op_relation |
http://www.osti.gov/servlets/purl/5659891 https://www.osti.gov/biblio/5659891 https://doi.org/10.2172/5659891 doi:10.2172/5659891 |
op_doi |
https://doi.org/10.2172/5659891 |
_version_ |
1772818862986756096 |