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Esmail Eltahan
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Journal Articles

Predicting Oil Recovery Under Uncertainty for Huff ‘n’ Puff Gas Injection: A Field Case Study in the Permian Basin

Esmail Eltahan, Reza Ganjdanesh, Kamy Sepehrnoori
Journal: SPE Journal
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 29 (11): 6484–6499.
Paper Number: SPE-223120-PA
https://doi.org/10.2118/223120-PA
Published: 13 November 2024
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View article titled, Predicting Oil Recovery Under Uncertainty for Huff ‘n’ Puff Gas Injection: A Field Case Study in the Permian Basin
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Journal Articles

A Quasi-Newton Trust-Region Method for Well Location Optimization Under Uncertainty

Esmail Eltahan, Faruk Omer Alpak, Kamy Sepehrnoori
Journal: SPE Journal
Publisher: Society of Petroleum Engineers (SPE)
SPE J. 29 (10): 5559–5575.
Paper Number: SPE-212212-PA
https://doi.org/10.2118/212212-PA
Published: 09 October 2024
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View article titled, A Quasi-Newton Trust-Region Method for Well Location Optimization Under Uncertainty
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Proceedings Papers

Deep Learning-Driven Acceleration of Stochastic Gradient Methods for Well Location Optimization Under Uncertainty

Esmail Eltahan, Kamy Sepehrnoori, Faruk Omer Alpak
Paper presented at the SPE Annual Technical Conference and Exhibition, September 23–25, 2024
Paper Number: SPE-220754-MS
https://doi.org/10.2118/220754-MS
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View Paper titled, Deep Learning-Driven Acceleration of Stochastic Gradient Methods for Well Location Optimization Under Uncertainty
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Proceedings Papers

Optimizing Hydrogen Storage in the Subsurface Using a Reservoir-Simulation-Based and Deep-Learning-Accelerated Optimization Method

Esmail Eltahan, Deema J. Albadan, Mojdeh Delshad, Kamy Sepehrnoori, Faruk Omer Alpak
Paper presented at the SPE Annual Technical Conference and Exhibition, September 23–25, 2024
Paper Number: SPE-220865-MS
https://doi.org/10.2118/220865-MS
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View Paper titled, Optimizing Hydrogen Storage in the Subsurface Using a Reservoir-Simulation-Based and Deep-Learning-Accelerated Optimization Method
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Proceedings Papers

A Fast and Robust Method for Estimating Inter-Well Interference in Shale and Tight Reservoirs

Esmail Eltahan, Ali Moinfar, Zhenzhen Wang, Matthieu Rousset, Haishan Luo, Pierre Muron, Xianhuan Wen
Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, June 17–19, 2024
Paper Number: URTEC-4031992-MS
https://doi.org/10.15530/urtec-2024-4031992
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View Paper titled, A Fast and Robust Method for Estimating Inter-Well Interference in Shale and Tight Reservoirs
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Proceedings Papers

A Study on Well Placement and Performance Forecasting in Uinta Basin Considering Geological Uncertainty

Esmail Eltahan, Mauricio Fiallos-Torres, Reza Ganjdanesh, Kamy Sepehrnoori
Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, June 13–15, 2023
Paper Number: URTEC-3863134-MS
https://doi.org/10.15530/urtec-2023-3863134
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View Paper titled, A Study on Well Placement and Performance Forecasting in Uinta Basin Considering Geological Uncertainty
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Proceedings Papers

A Quasi-Newton Method for Well Location Optimization Under Uncertainty

Esmail Eltahan, Faruk Omer Alpak, Kamy Sepehrnoori
Paper presented at the SPE Reservoir Simulation Conference, March 28–30, 2023
Paper Number: SPE-212212-MS
https://doi.org/10.2118/212212-MS
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View Paper titled, A Quasi-Newton Method for Well Location Optimization Under Uncertainty
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Proceedings Papers

Physics-Based and Data-Driven Wettability Alteration Model

Fabio Bordeaux-Rego, Mehran Mehrabi, Esmail Eltahan, Kamy Sepehrnoori
Paper presented at the SPE Improved Oil Recovery Conference, April 25–29, 2022
Paper Number: SPE-209349-MS
https://doi.org/10.2118/209349-MS
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View Paper titled, Physics-Based and Data-Driven Wettability Alteration Model
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Proceedings Papers

Geochemical Modeling of Petrophysical Alteration Effect on CO 2 Injectivity in Carbonate Rocks

Fabio Bordeaux Rego, Shayan Tavassoli, Esmail Eltahan, Kamy Sepehrnoori
Paper presented at the SPE International Conference on Oilfield Chemistry, December 6–7, 2021
Paper Number: SPE-204284-MS
https://doi.org/10.2118/204284-MS
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View Paper titled, Geochemical Modeling of Petrophysical Alteration Effect on CO 2 Injectivity in Carbonate Rocks
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Proceedings Papers

Analysis of Well Interference in Delaware Basin: A Physics-Based and Data-Driven Approach

Esmail Eltahan, Shayan Tavassoli, Brian Casey, Guinevere McDaid, Emery Goodman
Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 26–28, 2021
Paper Number: URTEC-2021-5559-MS
https://doi.org/10.15530/urtec-2021-5559
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View Paper titled, Analysis of Well Interference in Delaware Basin: A Physics-Based and Data-Driven Approach
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Proceedings Papers

Predictive Analysis of Well Interference in Tight Oil Reservoirs

Shayan Tavassoli, Esmail Eltahan, Katie Smye, Guin McDaid, Emery Goodman
Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 26–28, 2021
Paper Number: URTEC-2021-5669-MS
https://doi.org/10.15530/urtec-2021-5669
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View Paper titled, Predictive Analysis of Well Interference in Tight Oil Reservoirs
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Proceedings Papers

Machine Learning Approach to Improve Calculated Bottom-hole Pressure

Esmail Eltahan, Reza Ganjdanesh, Wei Yu, Kamy Sepehrnoori, Ryan Williams, Jack Nohavitsa
Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 26–28, 2021
Paper Number: URTEC-2021-5645-MS
https://doi.org/10.15530/urtec-2021-5645
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View Paper titled, Machine Learning Approach to Improve Calculated Bottom-hole Pressure
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Proceedings Papers

Predicting Oil Recovery Under Uncertainty for Huff-n-Puff Gas Injection: A Field Case Study in Permian

Esmail Eltahan, Reza Ganjdanesh, Kamy Sepehrnoori, Mathew D. Thuesen, Jack C. Nohavitza
Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 26–28, 2021
Paper Number: URTEC-2021-5676-MS
https://doi.org/10.15530/urtec-2021-5676
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View Paper titled, Predicting Oil Recovery Under Uncertainty for Huff-n-Puff Gas Injection: A Field Case Study in Permian
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Proceedings Papers

Wettability Alteration and Improved Oil Recovery in Unconventional Resources

Fabio Bordeaux Rego, Esmail Eltahan, Kamy Sepehrnoori
Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 26–28, 2021
Paper Number: URTEC-2021-5697-MS
https://doi.org/10.15530/urtec-2021-5697
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View Paper titled, Wettability Alteration and Improved Oil Recovery in Unconventional Resources
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Proceedings Papers

A Field Pilot of Huff-n-Puff Gas Injection for Enhanced Oil Recovery in Permian Basin

Reza Ganjdanesh, Esmail Eltahan, Kamy Sepehrnoori, Hunter Drozd, Raymond Ambrose
Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-201622-MS
https://doi.org/10.2118/201622-MS
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View Paper titled, A Field Pilot of Huff-n-Puff Gas Injection for Enhanced Oil Recovery in Permian Basin
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Proceedings Papers

On the Inference of Gas Diffusion Coefficient in Organic Matter of Shale Gas Reservoirs

Esmail Eltahan, Mehran Mehrabi, Kamy Sepehrnoori, Farzam Javadpour
Paper presented at the SPE Annual Technical Conference and Exhibition, October 26–29, 2020
Paper Number: SPE-201653-MS
https://doi.org/10.2118/201653-MS
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View Paper titled, On the Inference of Gas Diffusion Coefficient in Organic Matter of Shale Gas Reservoirs
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Proceedings Papers

Impact of Well Shut-in After Hydraulic-Fracture Treatments on Productivity and Recovery in Shale Oil Reservoirs

Esmail Eltahan, Fabio Bordeaux Rego, Wei Yu, Kamy Sepehrnoori
Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200395-MS
https://doi.org/10.2118/200395-MS
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View Paper titled, Impact of Well Shut-in After Hydraulic-Fracture Treatments on Productivity and Recovery in Shale Oil Reservoirs
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Proceedings Papers

Assisted History Matching Using Bayesian Inference: Application to Multi-well Simulation of a Huff-n-Puff Pilot Test in the Permian Basin

Esmail Eltahan, Reza Ganjdanesh, Wei Yu, Kamy Sepehrnoori, Hunter Drozd, Raymond Ambrose
Paper presented at the SPE/AAPG/SEG Unconventional Resources Technology Conference, July 20–22, 2020
Paper Number: URTEC-2020-2787-MS
https://doi.org/10.15530/urtec-2020-2787
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View Paper titled, Assisted History Matching Using Bayesian Inference: Application to Multi-well Simulation of a Huff-n-Puff Pilot Test in the Permian Basin
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Proceedings Papers

Modeling Naturally and Hydraulically Fractured Reservoirs with Artificial Intelligence and Assisted History Matching Methods Using Physics-Based Simulators

Esmail Eltahan, Wei Yu, Kamy Sepehrnoori, Erich Kerr, Jijun Miao, Ray Ambrose
Paper presented at the SPE Western Regional Meeting, April 23–26, 2019
Paper Number: SPE-195269-MS
https://doi.org/10.2118/195269-MS
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View Paper titled, Modeling Naturally and Hydraulically Fractured Reservoirs with Artificial Intelligence and Assisted History Matching Methods Using Physics-Based Simulators
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