Determination of closed porosity in rocks by small-angle neutron scattering

被引：0

作者：

Bahadur, Jitendra ^{[1
]}

Medina, Cristian R. ^{[2
]}

He, Lilin ^{[3
]}

Melnichenko, Yuri B. ^{[3
]}

Rupp, John A. ^{[2
]}

Blach, Tomasz P. ^{[4
]}

Mildner, David F.R. ^{[5
]}

机构：

[1] Solid State Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai,400085, India

[2] Indiana Geological Survey, Indiana University, Bloomington,IN,47405, United States

[3] Biology and Soft Matter Division, Oak Ridge National Laboratory, Oak Ridge,TN,37831, United States

[4] Institute for Future Environments, Queensland University of Technology, Brisbane,Q4000, Australia

[5] Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg,MD,20899, United States

来源：

Journal of Applied Crystallography | 2016年 / 49卷

基金：

美国国家科学基金会;

关键词：

Microporosity - Carbon dioxide - Aquifers - Digital storage - Neutron scattering;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Small-angle neutron scattering (SANS) and ultra-small-angle neutron scattering (USANS) have been used to study a carbonate rock from a deep saline aquifer that is a potential candidate as a storage reservoir for CO2 sequestration. A new methodology is developed for estimating the fraction of accessible and inaccessible pore volume using SANS/USANS measurements. This method does not require the achievement of zero average contrast for the calculation of accessible and inaccessible pore volume fraction. The scattering intensity at high Q increases with increasing CO2 pressure, in contrast with the low-Q behaviour where the intensity decreases with increasing pressure. Data treatment for high-Q scattering at different pressures of CO2 is also introduced to explain this anomalous behaviour. The analysis shows that a significant proportion of the pore system consists of micropores (

引用

页码：2021 / 2030