Quantification of Organic Porosity and Water Accessibility in Marcellus Shale Using Neutron Scattering

作者: Xin Gu , David F. R. Mildner , David R. Cole , Gernot Rother , Rudy Slingerland

DOI: 10.1021/ACS.ENERGYFUELS.5B02878

关键词: Volume (thermodynamics)MineralogyOrganic matterOil shaleSpecific surface areaNeutron scatteringSmall-angle neutron scatteringMatrix (geology)PorosityMaterials science

摘要: Pores within organic matter (OM) are a significant contributor to the total pore system in gas shales. These pores contribute most of storage capacity Here we present novel approach characterize OM structure (including porosity, specific surface area, size distribution, and water accessibility) Marcellus shale. By using ultrasmall small-angle neutron scattering, by exploiting contrast matching shale matrix with suitable mixtures deuterated protonated water, both water-accessible porosity were measured on centimeter-sized samples from two boreholes nanometer micrometer scale good statistical coverage. Samples also after combustion at 450 °C. Analysis scattering data these procedures allowed quantification accessibility. hosts 24–47% for organic-rich -poor samples. This occupies as much 29% volume. In contrast...

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