氮气吸附滞后回环定量分析及其在孔隙结构表征中的指示意义
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宋泽章, 阿比德·阿不拉, 吕明阳, 张月巧, 姜福杰, 刘哲宇, 郑伟, 王夏阳
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Quantitative analysis of nitrogen adsorption hysteresis loop and its indicative significance to pore structure characterization:A case study on the Upper Triassic Chang 7 Member, Ordos Basin
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Zezhang SONG, Abula ABIDE, Mingyang LYU, Yueqiao ZHANG, Fujie JIANG, Zheyu LIU, Wei ZHENG, Xiayang WANG
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表2 鄂尔多斯盆地陇东地区长7段泥页岩样品氮气吸附实验孔隙结构参数统计
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Table 2 Statistics of the pore structure parameters obtained from the low-temperature nitrogen adsorption tests of Chang 7 shale samples in Longdong area, Ordos Basin
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滞后回环类型 | 样品编号 | 深度/m | 滞后回环面积/ (mL·nm-1·g-1) | DFT比表面积/ (m2·g-1) | DFT比孔容/ (mL·g-1) | DFT平均孔径/nm | 孔隙表面分形维数(D1) | 孔隙结构分形维数(D2) |
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A类 | Z22 | 1584.65 | 0.578 68 | 13.840 | 0.048 55 | 7.032 | 2.518 | 2.609 | Z22 | 1626.00 | 0.565 96 | 15.080 | 0.048 05 | 7.032 | 2.533 | 2.605 | Z22 | 1632.45 | 0.711 39 | 20.210 | 0.060 20 | 2.583 | 2.579 | 2.620 | 平均值 | 0.618 68 | 16.377 | 0.052 27 | 5.549 | 2.543 | 2.611 | B类 | LI231 | 2105.90 | 0.561 16 | 9.872 | 0.046 56 | 7.032 | 2.451 | 2.452 | YAN56 | 3032.10 | 0.425 26 | 8.828 | 0.043 66 | 6.079 | 2.450 | 2.487 | YAN56 | 3058.40 | 0.742 62 | 10.210 | 0.051 74 | 7.032 | 2.445 | 2.438 | 平均值 | 0.576 35 | 9.637 | 0.047 32 | 6.714 | 2.449 | 2.459 | C类 | Z22 | 1563.40 | 0.203 17 | 7.641 | 0.038 32 | 12.120 | 2.528 | 2.458 | Z22 | 1569.10 | 0.143 76 | 5.675 | 0.026 76 | 7.032 | 2.558 | 2.479 | LI68 | 2078.90 | 0.147 53 | 8.459 | 0.027 35 | 2.583 | 2.627 | 2.545 | 平均值 | 0.164 82 | 7.258 | 0.030 81 | 7.245 | 2.571 | 2.494 |
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