To clarify the differences in pore connectivity in different directions within low-resistivity shale reservoirs, identify factors influencing the connectivity of low-resistivity shale reservoirs, and further discuss the impact of connectivity on rock resistivity, the marine organic-rich low-resistivity shale of the Longmaxi Formation in the Changning area of the Sichuan Basin was selected as the research object. Experiments such as X-ray diffraction mineral composition analysis and spontaneous imbibition were conducted to investigate the differences in pore connectivity of low-resistivity shale. The results indicate that the overall pore connectivity of low-resistivity shale is poor, with better connectivity parallel to the bedding direction than perpendicular to it. Different mineral contents have varying controlling effects on inorganic pore connectivity, with clay minerals playing a significant role in controlling spontaneous imbibition. Organic matter content and maturity have different effects on organic pore connectivity. Higher organic matter content corresponds to better connectivity of organic pores. When maturity is below 3.0%, higher maturity favors improved connectivity, while beyond this threshold, it adversely affects connectivity. Both inorganic and organic pore connectivity exhibit a strong negative correlation with shale resistivity, suggesting that formation water in shale pores can form effective conductive pathways. Formation water content plays a crucial role in controlling resistivity, which is of great significance for further research on the causes of low resistivity in this region.
| Published in | Science Discovery (Volume 14, Issue 2) |
| DOI | 10.11648/j.sd.20261402.14 |
| Page(s) | 44-53 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2026. Published by Science Publishing Group |
Low-resistivity Shale, Pore Connectivity, Spontaneous Imbibition, Changning Area
井名 | 深度/m | TOC/% | 测井电阻/（Ω·m） | Ro/% |
|---|---|---|---|---|
c-1 | 3506.06 | 2.59 | 19.77 | 3.37 |
c-2 | 3782.43 | 2.78 | 16.38 | 2.70 |
c-3 | 3594.66 | 6.85 | 11.53 | 2.93 |
c-4 | 2344.74 | 3.37 | 9.71 | 2.83 |
c-5 | 3933.41 | 4.58 | 8.21 | 3.00 |
c-6 | 3195.31 | 3.77 | 1.54 | 2.90 |
c-7 | 3639.60 | 3.48 | 1.13 | 3.30 |
c-8 | 3519.33 | 3.38 | 0.39 | 3.22 |
c-9 | 4327.14 | 6.93 | 0.19 | 3.00 |
序号 | 水吸实验(W) | 油吸实验(O) | ||
|---|---|---|---|---|
平行层理（P） | 垂直层理（T） | 平行层理（P） | 垂直层理（T） | |
c-1 | 0.26 | 0.30 | 0.39 | 0.40 |
c-2 | 0.24 | 0.25 | 0.46 | 0.25 |
c-3 | 0.26 | 0.23 | 0.53 | 0.31 |
c-4 | 0.36 | 0.35 | 0.43 | 0.29 |
c-5 | 0.35 | 0.29 | 0.46 | 0.37 |
c-6 | 0.38 | 0.32 | 0.47 | 0.39 |
c-7 | 0.39 | 0.33 | 0.44 | 0.35 |
c-8 | 0.45 | 0.44 | 0.38 | 0.35 |
c-9 | 0.32 | 0.29 | 0.54 | 0.37 |
序号 | 矿物含量/% | |||||
|---|---|---|---|---|---|---|
石英 | 斜长石 | 方解石 | 白云石 | 黄铁矿 | 黏土矿物 | |
c-1 | 69.5 | 2.4 | 7.4 | 3.4 | 3.0 | 14.3 |
c-2 | 41.2 | 8.4 | 8.9 | 5.9 | 3.2 | 32.4 |
c-3 | 43.0 | 4.0 | 23.0 | 20.0 | 2.0 | 8.0 |
c-4 | 43.4 | 1.8 | 21.6 | 16.6 | 2.0 | 14.6 |
c-5 | 51.1 | 2.7 | 21.7 | 11.2 | 2.3 | 11.0 |
c-6 | 38.4 | 3.7 | 27.5 | 13.8 | 2.5 | 14.3 |
c-7 | 40.0 | 4.0 | 30.0 | 10.0 | 6.0 | 10.0 |
c-8 | 61.6 | 6.7 | 7.4 | 4.7 | 5.7 | 13.9 |
c-9 | 64.0 | 5.0 | 6.0 | 8.0 | 3.0 | 14.0 |
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APA Style
Chen, R., Jiang, Z., Liang, X. (2026). Pore Connectivity of Low-resistivity Shales in the Changning Area and Its Influence on Resistivity. Science Discovery, 14(2), 44-53. https://doi.org/10.11648/j.sd.20261402.14
ACS Style
Chen, R.; Jiang, Z.; Liang, X. Pore Connectivity of Low-resistivity Shales in the Changning Area and Its Influence on Resistivity. Sci. Discov. 2026, 14(2), 44-53. doi: 10.11648/j.sd.20261402.14
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Download@article{10.11648/j.sd.20261402.14,
author = {Ruihua Chen and Zhenxue Jiang and Xing Liang},
title = {Pore Connectivity of Low-resistivity Shales in the Changning Area and Its Influence on Resistivity},
journal = {Science Discovery},
volume = {14},
number = {2},
pages = {44-53},
doi = {10.11648/j.sd.20261402.14},
url = {https://doi.org/10.11648/j.sd.20261402.14},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sd.20261402.14},
abstract = {To clarify the differences in pore connectivity in different directions within low-resistivity shale reservoirs, identify factors influencing the connectivity of low-resistivity shale reservoirs, and further discuss the impact of connectivity on rock resistivity, the marine organic-rich low-resistivity shale of the Longmaxi Formation in the Changning area of the Sichuan Basin was selected as the research object. Experiments such as X-ray diffraction mineral composition analysis and spontaneous imbibition were conducted to investigate the differences in pore connectivity of low-resistivity shale. The results indicate that the overall pore connectivity of low-resistivity shale is poor, with better connectivity parallel to the bedding direction than perpendicular to it. Different mineral contents have varying controlling effects on inorganic pore connectivity, with clay minerals playing a significant role in controlling spontaneous imbibition. Organic matter content and maturity have different effects on organic pore connectivity. Higher organic matter content corresponds to better connectivity of organic pores. When maturity is below 3.0%, higher maturity favors improved connectivity, while beyond this threshold, it adversely affects connectivity. Both inorganic and organic pore connectivity exhibit a strong negative correlation with shale resistivity, suggesting that formation water in shale pores can form effective conductive pathways. Formation water content plays a crucial role in controlling resistivity, which is of great significance for further research on the causes of low resistivity in this region.},
year = {2026}
}
TY - JOUR T1 - Pore Connectivity of Low-resistivity Shales in the Changning Area and Its Influence on Resistivity AU - Ruihua Chen AU - Zhenxue Jiang AU - Xing Liang Y1 - 2026/04/30 PY - 2026 N1 - https://doi.org/10.11648/j.sd.20261402.14 DO - 10.11648/j.sd.20261402.14 T2 - Science Discovery JF - Science Discovery JO - Science Discovery SP - 44 EP - 53 PB - Science Publishing Group SN - 2331-0650 UR - https://doi.org/10.11648/j.sd.20261402.14 AB - To clarify the differences in pore connectivity in different directions within low-resistivity shale reservoirs, identify factors influencing the connectivity of low-resistivity shale reservoirs, and further discuss the impact of connectivity on rock resistivity, the marine organic-rich low-resistivity shale of the Longmaxi Formation in the Changning area of the Sichuan Basin was selected as the research object. Experiments such as X-ray diffraction mineral composition analysis and spontaneous imbibition were conducted to investigate the differences in pore connectivity of low-resistivity shale. The results indicate that the overall pore connectivity of low-resistivity shale is poor, with better connectivity parallel to the bedding direction than perpendicular to it. Different mineral contents have varying controlling effects on inorganic pore connectivity, with clay minerals playing a significant role in controlling spontaneous imbibition. Organic matter content and maturity have different effects on organic pore connectivity. Higher organic matter content corresponds to better connectivity of organic pores. When maturity is below 3.0%, higher maturity favors improved connectivity, while beyond this threshold, it adversely affects connectivity. Both inorganic and organic pore connectivity exhibit a strong negative correlation with shale resistivity, suggesting that formation water in shale pores can form effective conductive pathways. Formation water content plays a crucial role in controlling resistivity, which is of great significance for further research on the causes of low resistivity in this region. VL - 14 IS - 2 ER -
State Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum (Beijing), Beijing, China;College of Geosciences, China University of Petroleum (Beijing), Beijing, China
State Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum (Beijing), Beijing, China
Exploration and Development Integration Center, PetroChina Zhejiang Oilfield Company, Hangzhou, China
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