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http://dx.doi.org/10.22807/KJMP.2021.34.4.209

The Study of Pore Structure in Shale Gas Reservoir Using Large-area Particle Measurement Method  

Park, Sun Young (Oil & Gas Research Center, Petroleum & Marine Research Division, Korea Institute of Geoscience and Mineral Resources)
Ko, Yong-kyu (COXEM Application LAB)
Choi, Jiyoung (Oil & Gas Research Center, Petroleum & Marine Research Division, Korea Institute of Geoscience and Mineral Resources)
Lee, Junhee (COXEM Application LAB)
Publication Information
Korean Journal of Mineralogy and Petrology / v.34, no.4, 2021 , pp. 209-218 More about this Journal
Abstract
Studies of pore structure in shale gas reservoirs are essential to increase recovery rates, which is in the spotlight concerning unconventional resources. In this study, the distribution of pores in shale gas reservoir sample were observed using Scanning Electron Microscope Particle Analysis (SELPA), which is appropriate to analyze the distribution of particle or shape for sample in large area. A sample from the A-068 borehole drilled in the Liard Basin was analyzed; calcite is the main mineral. The pore size ranges from tens of nanometers to hundreds of micrometers and the contribution of each pore size to overall sample porosity was determined using SELPA. The distribution of pores was determined by observing the surface in the same area at magnifications of ×1000, ×3000 and ×5000. Pores less than 100 nm were observed at high magnifications and confirm that small-scale pore distribution can be analyzed and identified rapidly using SELPA. The method introduced in this study will be useful to understand pore structures in unconventional reservoirs.
Keywords
shale gas reservoirs; pore structure; large-area particle measurement; Scanning Electron Microscope;
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