The Seepage Model Considering Liquid/Solid Interaction in Confined Nanoscale Pores
Different from conventional reservoirs, nanoscale pores and fractures are dominant in tight or shale reservoirs. The flow behaviors of hydrocarbons in nanopores (called “confined space”) are more complex than that of bulk spaces. The interaction between liquid hydrocarbons and solid pore wall cannot...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2018/8302782 |
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| author | Xiaona Cui Erlong Yang Kaoping Song Yuming Wang |
| author_facet | Xiaona Cui Erlong Yang Kaoping Song Yuming Wang |
| author_sort | Xiaona Cui |
| collection | DOAJ |
| description | Different from conventional reservoirs, nanoscale pores and fractures are dominant in tight or shale reservoirs. The flow behaviors of hydrocarbons in nanopores (called “confined space”) are more complex than that of bulk spaces. The interaction between liquid hydrocarbons and solid pore wall cannot be neglected. The viscosity formula which is varied with the pore diameter and interaction coefficient of liquids and solids in confined nanopores has been introduced in this paper to describe the interaction effects of hydrocarbons and pore walls. Based on the Navier-Stokes equation, the governing equation considered liquid/solid effect in two dimensions has been established, and approximate theoretical solutions to the governing equations have been achieved after mathematic simplification. By introducing the vortex equation, the complex numerical seepage model has been discretized and solved. Numerical results show that the radial velocity distribution near the solid wall has an obvious change when considering the liquid/solid interaction. The results consist well with that approximate mathematical solution. And when the capillary radius is smaller, the liquid and solid interaction coefficient n is greater. The liquid and solid interaction obviously cannot be neglected in the seepage model if the capillary radius is small than 50 nm when n>0.1. The numerical model has also been further validated by two types of nanopore flow tests: from pore to throat and inversely from throat to pore. There is no big difference in flow regularity of throat to pore model considering when liquid/solid interaction or not, whereas the liquid/solid interaction of pore to throat model totally cannot be overlooked. |
| format | Article |
| id | doaj-art-36eda7db6f7e40ac837b2bc3a8d89f14 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-36eda7db6f7e40ac837b2bc3a8d89f142025-02-03T05:44:05ZengWileyGeofluids1468-81151468-81232018-01-01201810.1155/2018/83027828302782The Seepage Model Considering Liquid/Solid Interaction in Confined Nanoscale PoresXiaona Cui0Erlong Yang1Kaoping Song2Yuming Wang3Department of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, ChinaDepartment of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, ChinaDepartment of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, ChinaDaqing Oilfield Limited Company, Daqing 163712, ChinaDifferent from conventional reservoirs, nanoscale pores and fractures are dominant in tight or shale reservoirs. The flow behaviors of hydrocarbons in nanopores (called “confined space”) are more complex than that of bulk spaces. The interaction between liquid hydrocarbons and solid pore wall cannot be neglected. The viscosity formula which is varied with the pore diameter and interaction coefficient of liquids and solids in confined nanopores has been introduced in this paper to describe the interaction effects of hydrocarbons and pore walls. Based on the Navier-Stokes equation, the governing equation considered liquid/solid effect in two dimensions has been established, and approximate theoretical solutions to the governing equations have been achieved after mathematic simplification. By introducing the vortex equation, the complex numerical seepage model has been discretized and solved. Numerical results show that the radial velocity distribution near the solid wall has an obvious change when considering the liquid/solid interaction. The results consist well with that approximate mathematical solution. And when the capillary radius is smaller, the liquid and solid interaction coefficient n is greater. The liquid and solid interaction obviously cannot be neglected in the seepage model if the capillary radius is small than 50 nm when n>0.1. The numerical model has also been further validated by two types of nanopore flow tests: from pore to throat and inversely from throat to pore. There is no big difference in flow regularity of throat to pore model considering when liquid/solid interaction or not, whereas the liquid/solid interaction of pore to throat model totally cannot be overlooked.http://dx.doi.org/10.1155/2018/8302782 |
| spellingShingle | Xiaona Cui Erlong Yang Kaoping Song Yuming Wang The Seepage Model Considering Liquid/Solid Interaction in Confined Nanoscale Pores Geofluids |
| title | The Seepage Model Considering Liquid/Solid Interaction in Confined Nanoscale Pores |
| title_full | The Seepage Model Considering Liquid/Solid Interaction in Confined Nanoscale Pores |
| title_fullStr | The Seepage Model Considering Liquid/Solid Interaction in Confined Nanoscale Pores |
| title_full_unstemmed | The Seepage Model Considering Liquid/Solid Interaction in Confined Nanoscale Pores |
| title_short | The Seepage Model Considering Liquid/Solid Interaction in Confined Nanoscale Pores |
| title_sort | seepage model considering liquid solid interaction in confined nanoscale pores |
| url | http://dx.doi.org/10.1155/2018/8302782 |
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