A Quick Method for Appraising Pore Connectivity and Ultimate Imbibed Porosity in Shale Reservoirs
Pore connectivity and ultimate imbibed porosity are two important parameters used to assess the shale oil reservoir property, the proper appraising of which could facilitate the efficient flow of oil from the matrix and an improvement in recovery efficiency. In previous studies, the uncertainty in s...
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MDPI AG
2025-01-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/13/1/174 |
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| author | Ziqing Hong Mianmo Meng Kong Deng Jingwen Bao Qianyou Wang Xingchen Liu |
| author_facet | Ziqing Hong Mianmo Meng Kong Deng Jingwen Bao Qianyou Wang Xingchen Liu |
| author_sort | Ziqing Hong |
| collection | DOAJ |
| description | Pore connectivity and ultimate imbibed porosity are two important parameters used to assess the shale oil reservoir property, the proper appraising of which could facilitate the efficient flow of oil from the matrix and an improvement in recovery efficiency. In previous studies, the uncertainty in sample dimensions and the extra-long stable time during imbibition experiments exploring pore connectivity and ultimate imbibed porosity showed a lack of discussion, which influenced the accuracy and efficiency of the SI experiments. In this study, SI experiments with shale samples of different thicknesses are carried out to acquire the two parameters in a short period of time. As a result, the pore connectivity of sample D86-5 from the Qingshankou Formation (Fm) in the Songliao Basin fluctuates with the increase in thicknesses, with an average of 0.265. The water penetrates sample D86-5 of all thicknesses, so the ultimate imbibed porosity fluctuates around 3.7%, and the stable time increases with thicknesses. The pore connectivity of sample Y172 from the Shahejie Fm in the Bohaiwan Basin fluctuates around an average of 0.026, which is much smaller than that of D86-5. The ultimate imbibed porosity of Y172 decreases with thicknesses because the penetration depth is so small that the pores cannot be fully accessed, and the stable time increases before becoming stable with fluctuations. The method is examined using the samples from the Liushagang Fm in the Beibuwan Basin measuring around 400 μm: the ultimate imbibed porosity of BW1-1 and BW1-3 is 5.8% and 18.1%, respectively, the pore connectivity of BW1-1, BW1-2, and BW1-3 is 0.086, 0.117, and 0.142, respectively, and the results can be obtained within a day. In comparison, the average pore connectivity of the 400 μm samples from Qingshankou, Shahejie, and Liushagang Fms is 0.324, 0.033, and 0.097, respectively, and the average ultimate imbibed porosity of these Fms is 3.7%, 3.1%, and 12.0%, respectively. Based on the above results, a quick method for measuring the two parameters with thin samples by spontaneous imbibition is established, providing a fast solution for the evaluation of the sweet spot. |
| format | Article |
| id | doaj-art-590eb81a24b5409c9597d76f2821450b |
| institution | Kabale University |
| issn | 2077-1312 |
| language | English |
| publishDate | 2025-01-01 |
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| series | Journal of Marine Science and Engineering |
| spelling | doaj-art-590eb81a24b5409c9597d76f2821450b2025-01-24T13:37:08ZengMDPI AGJournal of Marine Science and Engineering2077-13122025-01-0113117410.3390/jmse13010174A Quick Method for Appraising Pore Connectivity and Ultimate Imbibed Porosity in Shale ReservoirsZiqing Hong0Mianmo Meng1Kong Deng2Jingwen Bao3Qianyou Wang4Xingchen Liu5Hubei Key Laboratory of Marine Geological Resources, China University of Geosciences, Wuhan 430074, ChinaHubei Key Laboratory of Marine Geological Resources, China University of Geosciences, Wuhan 430074, ChinaKey Laboratory of Tectonics and Petroleum Resources, China University of Geosciences, Wuhan 430074, ChinaHubei Key Laboratory of Marine Geological Resources, China University of Geosciences, Wuhan 430074, ChinaDepartment of Earth, Ocean and Ecological Sciences, University of Liverpool, Liverpool L69 3GP, UKCementing Company, Sinopec Zhongyuan Petroleum Engineering Co., Ltd., Puyang 457100, ChinaPore connectivity and ultimate imbibed porosity are two important parameters used to assess the shale oil reservoir property, the proper appraising of which could facilitate the efficient flow of oil from the matrix and an improvement in recovery efficiency. In previous studies, the uncertainty in sample dimensions and the extra-long stable time during imbibition experiments exploring pore connectivity and ultimate imbibed porosity showed a lack of discussion, which influenced the accuracy and efficiency of the SI experiments. In this study, SI experiments with shale samples of different thicknesses are carried out to acquire the two parameters in a short period of time. As a result, the pore connectivity of sample D86-5 from the Qingshankou Formation (Fm) in the Songliao Basin fluctuates with the increase in thicknesses, with an average of 0.265. The water penetrates sample D86-5 of all thicknesses, so the ultimate imbibed porosity fluctuates around 3.7%, and the stable time increases with thicknesses. The pore connectivity of sample Y172 from the Shahejie Fm in the Bohaiwan Basin fluctuates around an average of 0.026, which is much smaller than that of D86-5. The ultimate imbibed porosity of Y172 decreases with thicknesses because the penetration depth is so small that the pores cannot be fully accessed, and the stable time increases before becoming stable with fluctuations. The method is examined using the samples from the Liushagang Fm in the Beibuwan Basin measuring around 400 μm: the ultimate imbibed porosity of BW1-1 and BW1-3 is 5.8% and 18.1%, respectively, the pore connectivity of BW1-1, BW1-2, and BW1-3 is 0.086, 0.117, and 0.142, respectively, and the results can be obtained within a day. In comparison, the average pore connectivity of the 400 μm samples from Qingshankou, Shahejie, and Liushagang Fms is 0.324, 0.033, and 0.097, respectively, and the average ultimate imbibed porosity of these Fms is 3.7%, 3.1%, and 12.0%, respectively. Based on the above results, a quick method for measuring the two parameters with thin samples by spontaneous imbibition is established, providing a fast solution for the evaluation of the sweet spot.https://www.mdpi.com/2077-1312/13/1/174spontaneous imbibitionpore connectivityultimate imbibed porositycapillary forceshale oil/gas |
| spellingShingle | Ziqing Hong Mianmo Meng Kong Deng Jingwen Bao Qianyou Wang Xingchen Liu A Quick Method for Appraising Pore Connectivity and Ultimate Imbibed Porosity in Shale Reservoirs Journal of Marine Science and Engineering spontaneous imbibition pore connectivity ultimate imbibed porosity capillary force shale oil/gas |
| title | A Quick Method for Appraising Pore Connectivity and Ultimate Imbibed Porosity in Shale Reservoirs |
| title_full | A Quick Method for Appraising Pore Connectivity and Ultimate Imbibed Porosity in Shale Reservoirs |
| title_fullStr | A Quick Method for Appraising Pore Connectivity and Ultimate Imbibed Porosity in Shale Reservoirs |
| title_full_unstemmed | A Quick Method for Appraising Pore Connectivity and Ultimate Imbibed Porosity in Shale Reservoirs |
| title_short | A Quick Method for Appraising Pore Connectivity and Ultimate Imbibed Porosity in Shale Reservoirs |
| title_sort | quick method for appraising pore connectivity and ultimate imbibed porosity in shale reservoirs |
| topic | spontaneous imbibition pore connectivity ultimate imbibed porosity capillary force shale oil/gas |
| url | https://www.mdpi.com/2077-1312/13/1/174 |
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