Estimating the upper limit of gas production from Class 2 hydrate accumulations in the permafrost: 2. Alternative well designs and sensitivity analysis
In the second paper of this series, we evaluate two additional well designs for production from permafrost-associated (PA) hydrate deposits. Both designs are within the capabilities of conventional technology. We determine that large volumes of gas can be produced at high rates (several MMSCFD) for...
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ftosti:oai:osti.gov:1007197 2023-07-30T04:06:17+02:00 Estimating the upper limit of gas production from Class 2 hydrate accumulations in the permafrost: 2. Alternative well designs and sensitivity analysis Moridis, G. Reagan, M.T. 2011-05-05 application/pdf http://www.osti.gov/servlets/purl/1007197 https://www.osti.gov/biblio/1007197 https://doi.org/10.1016/j.petrol.2010.12.001 unknown http://www.osti.gov/servlets/purl/1007197 https://www.osti.gov/biblio/1007197 https://doi.org/10.1016/j.petrol.2010.12.001 doi:10.1016/j.petrol.2010.12.001 54 58 CONFIGURATION DESIGN FLUID WITHDRAWAL HEATING HYDRATES PERFORMANCE PERMAFROST PERMEABILITY PRODUCTION SATURATION SENSITIVITY ANALYSIS WATER 2011 ftosti https://doi.org/10.1016/j.petrol.2010.12.001 2023-07-11T08:49:37Z In the second paper of this series, we evaluate two additional well designs for production from permafrost-associated (PA) hydrate deposits. Both designs are within the capabilities of conventional technology. We determine that large volumes of gas can be produced at high rates (several MMSCFD) for long times using either well design. The production approach involves initial fluid withdrawal from the water zone underneath the hydrate-bearing layer (HBL). The production process follows a cyclical pattern, with each cycle composed of two stages: a long stage (months to years) of increasing gas production and decreasing water production, and a short stage (days to weeks) that involves destruction of the secondary hydrate (mainly through warm water injection) that evolves during the first stage, and is followed by a reduction in the fluid withdrawal rate. A well configuration with completion throughout the HBL leads to high production rates, but also the creation of a secondary hydrate barrier around the well that needs to be destroyed regularly by water injection. However, a configuration that initially involves heating of the outer surface of the wellbore and later continuous injection of warm water at low rates (Case C) appears to deliver optimum performance over the period it takes for the exhaustion of the hydrate deposit. Using Case C as the standard, we determine that gas production from PA hydrate deposits increases with the fluid withdrawal rate, the initial hydrate saturation and temperature, and with the formation permeability. Other/Unknown Material permafrost SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Journal of Petroleum Science and Engineering 76 3-4 124 137 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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54 58 CONFIGURATION DESIGN FLUID WITHDRAWAL HEATING HYDRATES PERFORMANCE PERMAFROST PERMEABILITY PRODUCTION SATURATION SENSITIVITY ANALYSIS WATER |
spellingShingle |
54 58 CONFIGURATION DESIGN FLUID WITHDRAWAL HEATING HYDRATES PERFORMANCE PERMAFROST PERMEABILITY PRODUCTION SATURATION SENSITIVITY ANALYSIS WATER Moridis, G. Reagan, M.T. Estimating the upper limit of gas production from Class 2 hydrate accumulations in the permafrost: 2. Alternative well designs and sensitivity analysis |
topic_facet |
54 58 CONFIGURATION DESIGN FLUID WITHDRAWAL HEATING HYDRATES PERFORMANCE PERMAFROST PERMEABILITY PRODUCTION SATURATION SENSITIVITY ANALYSIS WATER |
description |
In the second paper of this series, we evaluate two additional well designs for production from permafrost-associated (PA) hydrate deposits. Both designs are within the capabilities of conventional technology. We determine that large volumes of gas can be produced at high rates (several MMSCFD) for long times using either well design. The production approach involves initial fluid withdrawal from the water zone underneath the hydrate-bearing layer (HBL). The production process follows a cyclical pattern, with each cycle composed of two stages: a long stage (months to years) of increasing gas production and decreasing water production, and a short stage (days to weeks) that involves destruction of the secondary hydrate (mainly through warm water injection) that evolves during the first stage, and is followed by a reduction in the fluid withdrawal rate. A well configuration with completion throughout the HBL leads to high production rates, but also the creation of a secondary hydrate barrier around the well that needs to be destroyed regularly by water injection. However, a configuration that initially involves heating of the outer surface of the wellbore and later continuous injection of warm water at low rates (Case C) appears to deliver optimum performance over the period it takes for the exhaustion of the hydrate deposit. Using Case C as the standard, we determine that gas production from PA hydrate deposits increases with the fluid withdrawal rate, the initial hydrate saturation and temperature, and with the formation permeability. |
author |
Moridis, G. Reagan, M.T. |
author_facet |
Moridis, G. Reagan, M.T. |
author_sort |
Moridis, G. |
title |
Estimating the upper limit of gas production from Class 2 hydrate accumulations in the permafrost: 2. Alternative well designs and sensitivity analysis |
title_short |
Estimating the upper limit of gas production from Class 2 hydrate accumulations in the permafrost: 2. Alternative well designs and sensitivity analysis |
title_full |
Estimating the upper limit of gas production from Class 2 hydrate accumulations in the permafrost: 2. Alternative well designs and sensitivity analysis |
title_fullStr |
Estimating the upper limit of gas production from Class 2 hydrate accumulations in the permafrost: 2. Alternative well designs and sensitivity analysis |
title_full_unstemmed |
Estimating the upper limit of gas production from Class 2 hydrate accumulations in the permafrost: 2. Alternative well designs and sensitivity analysis |
title_sort |
estimating the upper limit of gas production from class 2 hydrate accumulations in the permafrost: 2. alternative well designs and sensitivity analysis |
publishDate |
2011 |
url |
http://www.osti.gov/servlets/purl/1007197 https://www.osti.gov/biblio/1007197 https://doi.org/10.1016/j.petrol.2010.12.001 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
http://www.osti.gov/servlets/purl/1007197 https://www.osti.gov/biblio/1007197 https://doi.org/10.1016/j.petrol.2010.12.001 doi:10.1016/j.petrol.2010.12.001 |
op_doi |
https://doi.org/10.1016/j.petrol.2010.12.001 |
container_title |
Journal of Petroleum Science and Engineering |
container_volume |
76 |
container_issue |
3-4 |
container_start_page |
124 |
op_container_end_page |
137 |
_version_ |
1772818801448976384 |