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| Content Provider | Directory of Open Access Journals (DOAJ) |
|---|---|
| Author | Weizhu Zeng Zhiguang Song |
| Abstract | The Cretaceous lacustrine shales of the Qingshankou Formation $(K_{2}$qn) from the Songliao Basin are recognized as a potential shale oil reservoir in China. Pore structure of shale within the oil window could be significantly influenced by several factors, including mineral and organic matter (OM) compositions. For a better understanding of the factors controlling the pore structure of these shales, 15 core shales from the $K_{2}$qn were subjected to low-pressure $N_{2}$ adsorption measurement for both the initial and solvent extracted samples, and the relationships between shale compositions and pore structure parameters were discussed. The results show that the average specific surface area (SSA) and pore volume (PV) increase from 10.14 $m^{2}$/g to 29.74 $m^{2}$/g and from 0.0276 $cm^{3}$/g to 0.0554 $cm^{3}$/g respectively after extraction, which suggests that the nanopores in these shales could be significantly occupied by the soluble OM, especially for the pores smaller than 10 nm in size. For the extracted samples, the good positive correlations between the SSA and the illite/smectite (I/S) content indicate that a significant amount of small pores are associated with this mineral, while the overall positive correlations between the PVs with the I/S and OM contents suggest that I/S mineral and organic matter (kerogen) have contributed most to pores lager than 10 nm. It is assessed that OM pores contribute approximately 16% to total PV of these shales. Our results will improve the understanding of pore characterization of the clay- and OM-rich lacustrine shales and provide some implications for shale oil accumulation in the Songliao Basin. |
| e-ISSN | 19961073 |
| DOI | 10.3390/en15197075 |
| Journal | Energies |
| Issue Number | 7075 |
| Volume Number | 15 |
| Language | English |
| Publisher | MDPI AG |
| Publisher Date | 2022-09-01 |
| Publisher Place | Switzerland |
| Access Restriction | Open |
| Subject Keyword | Technology Pore Structure Organic Matter Lacustrine Shales Songliao Basin |
| Content Type | Text |
| Resource Type | Article |
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