DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Surface and bulk characterization of reservoir and cap-rocks: Past, present, and future

Abstract

Geologic formations provide potentially some of the largest volume capacities for CO2 storage or sequestration. Potential storage sites can be deep saline aquifers, depleted oil reservoirs, and coal seams, surrounded by sealing layers to prevent CO2 from leaking. It is therefore critical to understand mechanisms contributing to CO2 trapping and CO2 leaks. Both phenomena are governed by reactions at the interfaces of the reservoir and cap-rocks and are controlled by the complex chemistry and pore structures of rocks. Mechanisms at the macroscale are affected by the processes occurring at the nanoscale. This review highlights the necessity of multitechnique, multiscale characterization of rocks and points to the importance of surface analysis and surface science studies. Two shale rocks (seals) from Niobrara and Agardhfjellet formations with complex surface chemistry are used as examples throughout the paper. Typically, evaluation of rocks with x-ray diffraction, thermogravimetric analysis, Rock-Eval pyrolysis, gas adsorption, and electron microscopy combined with energy dispersive x-ray spectroscopy is conducted to provide valuable information about the bulk mineralogy, elemental composition, pore volume, and adsorbed species on the sample surface. These studies are necessary prior to designing surface sensitive experiments with x-ray photoelectron spectroscopy (XPS), guiding both sample preparation and sample analysis. XPSmore » has been widely used to study the surface composition of rocks during the investigations of their fine-scale wettability, and the main findings are highlighted here. This paper also reviews the existing literature on ambient-pressure XPS, which provides new opportunities to study in situ chemical alteration due to interactions with CO2 and offers recommendations for adapting this technique to study rock-fluid interactions, allowing for the identification of fundamental interactions during CO2 sequestration and guide selection of formation sites for improved storage.« less

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1]
  1. Colorado School of Mines, Golden, CO (United States). Dept. of Petroleum Engineering
Publication Date:
Research Org.:
Colorado School of Mines, Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1799767
Alternate Identifier(s):
OSTI ID: 1639137
Grant/Contract Number:  
FE0023223; DEFE0023223
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Vacuum Science and Technology A
Additional Journal Information:
Journal Volume: 38; Journal Issue: 5; Journal ID: ISSN 0734-2101
Publisher:
American Vacuum Society / AIP
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Materials Science; Physics

Citation Formats

Murugesu, Manju Pharkavi, Prasad, Manika, and Pylypenko, Svitlana. Surface and bulk characterization of reservoir and cap-rocks: Past, present, and future. United States: N. p., 2020. Web. doi:10.1116/6.0000319.
Murugesu, Manju Pharkavi, Prasad, Manika, & Pylypenko, Svitlana. Surface and bulk characterization of reservoir and cap-rocks: Past, present, and future. United States. https://doi.org/10.1116/6.0000319
Murugesu, Manju Pharkavi, Prasad, Manika, and Pylypenko, Svitlana. Mon . "Surface and bulk characterization of reservoir and cap-rocks: Past, present, and future". United States. https://doi.org/10.1116/6.0000319. https://www.osti.gov/servlets/purl/1799767.
@article{osti_1799767,
title = {Surface and bulk characterization of reservoir and cap-rocks: Past, present, and future},
author = {Murugesu, Manju Pharkavi and Prasad, Manika and Pylypenko, Svitlana},
abstractNote = {Geologic formations provide potentially some of the largest volume capacities for CO2 storage or sequestration. Potential storage sites can be deep saline aquifers, depleted oil reservoirs, and coal seams, surrounded by sealing layers to prevent CO2 from leaking. It is therefore critical to understand mechanisms contributing to CO2 trapping and CO2 leaks. Both phenomena are governed by reactions at the interfaces of the reservoir and cap-rocks and are controlled by the complex chemistry and pore structures of rocks. Mechanisms at the macroscale are affected by the processes occurring at the nanoscale. This review highlights the necessity of multitechnique, multiscale characterization of rocks and points to the importance of surface analysis and surface science studies. Two shale rocks (seals) from Niobrara and Agardhfjellet formations with complex surface chemistry are used as examples throughout the paper. Typically, evaluation of rocks with x-ray diffraction, thermogravimetric analysis, Rock-Eval pyrolysis, gas adsorption, and electron microscopy combined with energy dispersive x-ray spectroscopy is conducted to provide valuable information about the bulk mineralogy, elemental composition, pore volume, and adsorbed species on the sample surface. These studies are necessary prior to designing surface sensitive experiments with x-ray photoelectron spectroscopy (XPS), guiding both sample preparation and sample analysis. XPS has been widely used to study the surface composition of rocks during the investigations of their fine-scale wettability, and the main findings are highlighted here. This paper also reviews the existing literature on ambient-pressure XPS, which provides new opportunities to study in situ chemical alteration due to interactions with CO2 and offers recommendations for adapting this technique to study rock-fluid interactions, allowing for the identification of fundamental interactions during CO2 sequestration and guide selection of formation sites for improved storage.},
doi = {10.1116/6.0000319},
journal = {Journal of Vacuum Science and Technology A},
number = 5,
volume = 38,
place = {United States},
year = {Mon Jul 20 00:00:00 EDT 2020},
month = {Mon Jul 20 00:00:00 EDT 2020}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

Save / Share: