Laboratory characterization of shale pores

Global Colloquium on GeoSciences and Engineering 2017

Listiyowati, Lina Nur^1

Research Center of Geotechnology LIPI, Bandung, Indonesia^1

关键词: Complex pore systems;    Direct observations;    High heterogeneity;    Indirect measurements;    Measurement techniques;    Microstructure analysis;    Shale gas reservoirs;    Ultra-fine-grained;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/118/1/012067/pdf
DOI  :  10.1088/1755-1315/118/1/012067

来源: IOP

【 摘 要 】

To estimate the potential of shale gas reservoir, one needs to understand the characteristics of pore structures. Characterization of shale gas reservoir microstructure is still a challenge due to ultra-fine grained micro-fabric and micro level heterogeneity of these sedimentary rocks. The sample used in the analysis is a small portion of any reservoir. Thus, each measurement technique has a different result. It raises the question which methods are suitable for characterizing pore shale. The goal of this paper is to summarize some of the microstructure analysis tools of shale rock to get near-real results. The two analyzing pore structure methods are indirect measurement (MIP, He, NMR, LTNA) and direct observation (SEM, TEM, Xray CT). Shale rocks have a high heterogeneity; thus, it needs multiscale quantification techniques to understand their pore structures. To describe the complex pore system of shale, several measurement techniques are needed to characterize the surface area and pore size distribution (LTNA, MIP), shapes, size and distribution of pore (FIB-SEM, TEM, Xray CT), and total porosity (He pycnometer, NMR). The choice of techniques and methods should take into account the purpose of the analysis and also the time and budget.