Effect of Hydrogen Exposure on Shale Reservoir Properties: A Thorough Experimental Study Evaluating Interaction of Hydrogen with Rock and Fluid when Exploring Storage Potential

Elie Bechara, Talal Gamadi, Sugan Raj Thiyagarajan, Athar Hussain, Hossein Emadi, Ion Ispas, Cecil Millikan

Research output: Contribution to conferencePaperpeer-review

Abstract

Underground hydrogen storage in porous media (UHSP) is a new science in the U.S. where unconventional resources have contributed towards 65% of hydrocarbon production in 2021. When exploring possibility of UHSP in shale reservoirs, effect of hydrogen on reservoir properties needs to be evaluated. A preliminary study (URTEC-3723858-MS) done on rock and fluid has showcased some changes for four major shale formations. However, a more thorough analysis needs to be taken into consideration. The ultimate goal of experimentation is understanding how hydrogen affects reservoir properties, before evaluating hydrogen storage. The initial study explored changes in wettability, interfacial tension between oil and water, viscosity and density, whereas this work focuses on exploring changes with these same properties, along with permeability, porosity, ultrasonic velocity, and elastic properties, under larger exposure periods at in-situ conditions. Furthermore, scanning and imaging of rock and fluid is to be taken into consideration to assess if hydrogen is being dissipated into formation or fluid during exposure. Also, exploring the interaction between hydrogen and methane would help evaluate the effect of natural gas presence. Any significant chemical reaction is to be noted in the process. Experiments are conducted on rock and fluid of different shale formations. Change in properties is used to help analyze the potential of hydrogen storage under specified conditions. An initial analysis would suggest that increase in permeability and porosity could imply better hydrogen storage. Change in wettability after exposure would define what fluids could accompany hydrogen when extracted after storage, to estimate recovery rates. A change from oil-wet to water-wet can lead to undesirable crude oil production during extraction. Alterations in ultrasonic velocity and elastic properties are recorded to judge if hydrogen could affect physical properties of the rock. Interaction with methane determines if hydrogen is being mixed in the process. Scanning helps better determine if hydrogen interacted with rock and fluid, by exploring adherence and reaction. The recent rise of hydrocarbon production from unconventional shale formations has led to the depletion of many reservoirs that could serve as potential storage for hydrogen. As detailed in our previous study, we estimate that a large amount of hydrogen energy could be stored in shale formations. Studies have been done to optimize carbon sequestration and natural gas storage. Similarly, investigating the possibility of hydrogen storage would also prove to be useful.

Original languageEnglish
DOIs
StatePublished - 2023
Event2023 SPE/AAPG/SEG Unconventional Resources Technology Conference, URTC 2023 - Denver, United States
Duration: Jun 13 2023Jun 15 2023

Conference

Conference2023 SPE/AAPG/SEG Unconventional Resources Technology Conference, URTC 2023
Country/TerritoryUnited States
CityDenver
Period06/13/2306/15/23

Fingerprint

Dive into the research topics of 'Effect of Hydrogen Exposure on Shale Reservoir Properties: A Thorough Experimental Study Evaluating Interaction of Hydrogen with Rock and Fluid when Exploring Storage Potential'. Together they form a unique fingerprint.

Cite this