Abstract
This chapter discusses the microstructural characterization of gas shale samples through mercury injection capillary pressure (MICP), low-field nuclear magnetic resonance (NMR), and nitrogen (N2) adsorption. High resolution focused ion beam-scanning electron microscopy (FIB-SEM) image analysis is used to support the experimental pore structure interpretations at submicron level. The chapter focuses on three key areas: comparisons of pore size distribution (PSD), recognizing the relationship between pore geometry and permeability, and effects of clay occurrence on fluid transport properties. The combination of MICP, N2, and NMR forms an ideal approach to overcome each of their individual limits in terms of pore size resolution and the external influences. The MICP technique determines various quantifiable aspects of a porous medium such as pore diameter, total pore volume, surface area, and bulk and absolute densities. The MICP technique directly measures the pore volume through the mercury volume injected and requires small rock cuttings or fragments.
Original language | English |
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Title of host publication | Fundamentals of Gas Shale Reservoirs |
Publisher | wiley |
Pages | 89-116 |
Number of pages | 28 |
ISBN (Electronic) | 9781119039228 |
ISBN (Print) | 9781118645796 |
DOIs | |
Publication status | Published - 6 Jul 2015 |
Externally published | Yes |
Keywords
- Focused ion beam-scanning electron microscopy
- Gas shale reservoirs
- Mercury injection capillary pressure
- Nitrogen adsorption
- Nuclear magnetic resonance
- Pore geometry
- Pore size distribution
- Small rock cuttings