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Formation, preservation and connectivity control of organic pores in shale
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BORJIGIN Tenger,LU Longfei,YU Lingjie,ZHANG Wentao,PAN Anyang,SHEN Baojian,WANG Ye,YANG Yunfeng,GAO Zhiwei
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Table 3 Critical percolation porosity and connectivity of O3w-S1l shale samples with different structures.
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| Well | Rock
texture | Porosity/
% | Orienta-
tion | Connec-
tivity | Threshold porosity/% | | JY1 | Pores inside organic
matter particle | 1.42 | X∥ | 1 | 1.42 | | Y⊥ | 1 | | Z∥ | 0 | | 3.23 | X∥ | 1 | | Y⊥ | 1 | | Z∥ | 0 | | 5.19 | X∥ | 1 | | Y⊥ | 1 | | Z∥ | 1 | | DYS1 | Laminar siliceous shale | 4.26 | X∥ | 0 | 6.31 | | Y⊥ | 0 | | Z∥ | 0 | | 6.31 | X∥ | 1 | | Y⊥ | 0 | | Z∥ | 3 | | 7.46 | X∥ | 1 | | Y⊥ | 1 | | Z∥ | 3 | | JY9 | Massive siliceous shale | 5.54 | X∥ | 0 | 9.26 | | Y⊥ | 0 | | Z∥ | 0 | | 9.26 | X∥ | 1 | | Y⊥ | 1 | | Z∥ | 1 | | 10.2 | X∥ | 1 | | Y⊥ | 1 | | Z∥ | 1 |
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