Pore-Scale Modelling of Three-Phase Capillary Pressure Curves Directly in Uniformly Wet Rock Images
In this work, we developed a semianalytical model to compute three-phase capillary pressure curves and associated fluid configurations for gas invasion in uniformly wet rock images. The fluid configurations and favorable capillary entry pressures are determined based on free energy minimization by c...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/6622079 |
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| _version_ | 1832554999775756288 |
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| author | Yingfang Zhou Dimitrios Georgios Hatzignatiou Johan Olav Helland Yulong Zhao Jianchao Cai |
| author_facet | Yingfang Zhou Dimitrios Georgios Hatzignatiou Johan Olav Helland Yulong Zhao Jianchao Cai |
| author_sort | Yingfang Zhou |
| collection | DOAJ |
| description | In this work, we developed a semianalytical model to compute three-phase capillary pressure curves and associated fluid configurations for gas invasion in uniformly wet rock images. The fluid configurations and favorable capillary entry pressures are determined based on free energy minimization by combining all physically allowed three-phase arc menisci. The model was first validated against analytical solutions developed in a star-shaped pore space and subsequently employed on an SEM image of Bentheim sandstone. The simulated fluid configurations show similar oil-layer behavior as previously imaged three-phase fluid configurations. The simulated saturation path indicates that the oil-water capillary pressure can be described as a function of the water saturation only. The gas-oil capillary pressure can be represented as a function of gas saturation in the majority part of the three-phase region, while the three-phase displacements slightly reduce the accuracy of such representation. At small oil saturations, the gas-oil capillary pressure depends strongly on two-phase saturations. |
| format | Article |
| id | doaj-art-6e370e8a03074597931f0947eb132b4e |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-6e370e8a03074597931f0947eb132b4e2025-02-03T05:49:50ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/66220796622079Pore-Scale Modelling of Three-Phase Capillary Pressure Curves Directly in Uniformly Wet Rock ImagesYingfang Zhou0Dimitrios Georgios Hatzignatiou1Johan Olav Helland2Yulong Zhao3Jianchao Cai4State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan, ChinaPetroleum Engineering Department, University of Houston, 5000 Gulf Freeway, Technology Bridge, Building 9B, Room 158, Houston, Texas 77204-0945, USAInternational Research Institute of Stavanger, P.O. Box 8046, 4068 Stavanger, NorwayState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan, ChinaState Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing, ChinaIn this work, we developed a semianalytical model to compute three-phase capillary pressure curves and associated fluid configurations for gas invasion in uniformly wet rock images. The fluid configurations and favorable capillary entry pressures are determined based on free energy minimization by combining all physically allowed three-phase arc menisci. The model was first validated against analytical solutions developed in a star-shaped pore space and subsequently employed on an SEM image of Bentheim sandstone. The simulated fluid configurations show similar oil-layer behavior as previously imaged three-phase fluid configurations. The simulated saturation path indicates that the oil-water capillary pressure can be described as a function of the water saturation only. The gas-oil capillary pressure can be represented as a function of gas saturation in the majority part of the three-phase region, while the three-phase displacements slightly reduce the accuracy of such representation. At small oil saturations, the gas-oil capillary pressure depends strongly on two-phase saturations.http://dx.doi.org/10.1155/2021/6622079 |
| spellingShingle | Yingfang Zhou Dimitrios Georgios Hatzignatiou Johan Olav Helland Yulong Zhao Jianchao Cai Pore-Scale Modelling of Three-Phase Capillary Pressure Curves Directly in Uniformly Wet Rock Images Geofluids |
| title | Pore-Scale Modelling of Three-Phase Capillary Pressure Curves Directly in Uniformly Wet Rock Images |
| title_full | Pore-Scale Modelling of Three-Phase Capillary Pressure Curves Directly in Uniformly Wet Rock Images |
| title_fullStr | Pore-Scale Modelling of Three-Phase Capillary Pressure Curves Directly in Uniformly Wet Rock Images |
| title_full_unstemmed | Pore-Scale Modelling of Three-Phase Capillary Pressure Curves Directly in Uniformly Wet Rock Images |
| title_short | Pore-Scale Modelling of Three-Phase Capillary Pressure Curves Directly in Uniformly Wet Rock Images |
| title_sort | pore scale modelling of three phase capillary pressure curves directly in uniformly wet rock images |
| url | http://dx.doi.org/10.1155/2021/6622079 |
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