Numerical simulations of depressurization-induced gas production from gas hydrates using 3-D heterogeneous models of L-Pad, Prudhoe Bay Unit, North Slope Alaska
Gas production potential is estimated using a three-dimensional reservoir model based on gas hydrate deposits located in the Prudhoe Bay region of the Alaska's North Slope. The model incorporates two hydrate-bearing sand units using detailed reservoir geological and structural information obtai...
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ftosti:oai:osti.gov:1478208 2023-07-30T04:05:44+02:00 Numerical simulations of depressurization-induced gas production from gas hydrates using 3-D heterogeneous models of L-Pad, Prudhoe Bay Unit, North Slope Alaska Myshakin, Evgeniy M. Ajayi, Taiwo Anderson, Brian J. Seol, Yongkoo Boswell, Ray 2023-06-28 application/pdf http://www.osti.gov/servlets/purl/1478208 https://www.osti.gov/biblio/1478208 https://doi.org/10.1016/j.jngse.2016.09.070 unknown http://www.osti.gov/servlets/purl/1478208 https://www.osti.gov/biblio/1478208 https://doi.org/10.1016/j.jngse.2016.09.070 doi:10.1016/j.jngse.2016.09.070 03 NATURAL GAS 58 GEOSCIENCES 2023 ftosti https://doi.org/10.1016/j.jngse.2016.09.070 2023-07-11T09:29:37Z Gas production potential is estimated using a three-dimensional reservoir model based on gas hydrate deposits located in the Prudhoe Bay region of the Alaska's North Slope. The model incorporates two hydrate-bearing sand units using detailed reservoir geological and structural information obtained from past and recent drilling programs. Geostatistical porosity models, conditioned to log data from 78 wells drilled in the vicinity of the Prudhoe Bay “L-Pad,” were developed, providing 3D heterogeneity in porosity, porosity-dependent hydrate saturation, and intrinsic permeability. The simulations utilize both vertical and inclined wellbores to induce depressurization of the reservoir at a constant bottom-hole pressure. The results show the superior performance of the inclined well design. Average gas production rates during the first five years were ~6.0 × 10 4 ST m 3 /day (~2.1 MMSCF/day) and ~2.7 × 10 4 ST m 3 /day (~1.0 MMSCF/day) for incline and vertical wells, respectively. After 30 years 5.3 × 10 8 - 5.7 × 10 8 ST m 3 (18.6–20.2 BSCF) and 6.2 × 10 8 - 6.4 × 10 8 ST m 3 (22.0–22.7 BSCF) gas were produced using the vertical and inclined well configurations, respectively. The analysis reveals that 2D reservoir models with homogeneous representations for porosity and hydrate saturation significantly underestimate production potential. The heterogeneity implemented in this work provides complex porous network and preferential pathways for mobile phase flow to a producing well. Consequently, no secondary hydrate formation around a wellbore is predicted in contrast to models that utilize uniform porosity and hydrate saturation distributions. Other/Unknown Material north slope Prudhoe Bay Alaska SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Journal of Natural Gas Science and Engineering 35 1336 1352 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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ftosti |
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unknown |
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03 NATURAL GAS 58 GEOSCIENCES |
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03 NATURAL GAS 58 GEOSCIENCES Myshakin, Evgeniy M. Ajayi, Taiwo Anderson, Brian J. Seol, Yongkoo Boswell, Ray Numerical simulations of depressurization-induced gas production from gas hydrates using 3-D heterogeneous models of L-Pad, Prudhoe Bay Unit, North Slope Alaska |
topic_facet |
03 NATURAL GAS 58 GEOSCIENCES |
description |
Gas production potential is estimated using a three-dimensional reservoir model based on gas hydrate deposits located in the Prudhoe Bay region of the Alaska's North Slope. The model incorporates two hydrate-bearing sand units using detailed reservoir geological and structural information obtained from past and recent drilling programs. Geostatistical porosity models, conditioned to log data from 78 wells drilled in the vicinity of the Prudhoe Bay “L-Pad,” were developed, providing 3D heterogeneity in porosity, porosity-dependent hydrate saturation, and intrinsic permeability. The simulations utilize both vertical and inclined wellbores to induce depressurization of the reservoir at a constant bottom-hole pressure. The results show the superior performance of the inclined well design. Average gas production rates during the first five years were ~6.0 × 10 4 ST m 3 /day (~2.1 MMSCF/day) and ~2.7 × 10 4 ST m 3 /day (~1.0 MMSCF/day) for incline and vertical wells, respectively. After 30 years 5.3 × 10 8 - 5.7 × 10 8 ST m 3 (18.6–20.2 BSCF) and 6.2 × 10 8 - 6.4 × 10 8 ST m 3 (22.0–22.7 BSCF) gas were produced using the vertical and inclined well configurations, respectively. The analysis reveals that 2D reservoir models with homogeneous representations for porosity and hydrate saturation significantly underestimate production potential. The heterogeneity implemented in this work provides complex porous network and preferential pathways for mobile phase flow to a producing well. Consequently, no secondary hydrate formation around a wellbore is predicted in contrast to models that utilize uniform porosity and hydrate saturation distributions. |
author |
Myshakin, Evgeniy M. Ajayi, Taiwo Anderson, Brian J. Seol, Yongkoo Boswell, Ray |
author_facet |
Myshakin, Evgeniy M. Ajayi, Taiwo Anderson, Brian J. Seol, Yongkoo Boswell, Ray |
author_sort |
Myshakin, Evgeniy M. |
title |
Numerical simulations of depressurization-induced gas production from gas hydrates using 3-D heterogeneous models of L-Pad, Prudhoe Bay Unit, North Slope Alaska |
title_short |
Numerical simulations of depressurization-induced gas production from gas hydrates using 3-D heterogeneous models of L-Pad, Prudhoe Bay Unit, North Slope Alaska |
title_full |
Numerical simulations of depressurization-induced gas production from gas hydrates using 3-D heterogeneous models of L-Pad, Prudhoe Bay Unit, North Slope Alaska |
title_fullStr |
Numerical simulations of depressurization-induced gas production from gas hydrates using 3-D heterogeneous models of L-Pad, Prudhoe Bay Unit, North Slope Alaska |
title_full_unstemmed |
Numerical simulations of depressurization-induced gas production from gas hydrates using 3-D heterogeneous models of L-Pad, Prudhoe Bay Unit, North Slope Alaska |
title_sort |
numerical simulations of depressurization-induced gas production from gas hydrates using 3-d heterogeneous models of l-pad, prudhoe bay unit, north slope alaska |
publishDate |
2023 |
url |
http://www.osti.gov/servlets/purl/1478208 https://www.osti.gov/biblio/1478208 https://doi.org/10.1016/j.jngse.2016.09.070 |
genre |
north slope Prudhoe Bay Alaska |
genre_facet |
north slope Prudhoe Bay Alaska |
op_relation |
http://www.osti.gov/servlets/purl/1478208 https://www.osti.gov/biblio/1478208 https://doi.org/10.1016/j.jngse.2016.09.070 doi:10.1016/j.jngse.2016.09.070 |
op_doi |
https://doi.org/10.1016/j.jngse.2016.09.070 |
container_title |
Journal of Natural Gas Science and Engineering |
container_volume |
35 |
container_start_page |
1336 |
op_container_end_page |
1352 |
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1772817856290881536 |