Pore Structure and Limit Pressure of Gas Slippage Effect in Tight Sandstone
Gas slip effect is an important mechanism that the gas flow is different from liquid flow in porous media. It is generally considered that the lower the permeability in porous media is, the more severe slip effect of gas flow will be. We design and then carry out experiments with the increase of bac...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2013/572140 |
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| author | Lijun You Kunlin Xue Yili Kang Yi Liao Lie Kong |
| author_facet | Lijun You Kunlin Xue Yili Kang Yi Liao Lie Kong |
| author_sort | Lijun You |
| collection | DOAJ |
| description | Gas slip effect is an important mechanism that the gas flow is different from liquid flow in porous media. It is generally considered that the lower the permeability in porous media is, the more severe slip effect of gas flow will be. We design and then carry out experiments with the increase of backpressure at the outlet of the core samples based on the definition of gas slip effect and in view of different levels of permeability of tight sandstone reservoir. This study inspects a limit pressure of the gas slip effect in tight sandstones and analyzes the characteristic parameter of capillary pressure curves. The experimental results indicate that gas slip effect can be eliminated when the backpressure reaches a limit pressure. When the backpressure exceeds the limit pressure, the measured gas permeability is a relatively stable value whose range is less than 3% for a given core sample. It is also found that the limit pressure increases with the decreasing in permeability and has close relation with pore structure of the core samples. The results have an important influence on correlation study on gas flow in porous medium, and are beneficial to reduce the workload of laboratory experiment. |
| format | Article |
| id | doaj-art-314ae9ce04a94d10b93d3548f70fcbfb |
| institution | Kabale University |
| issn | 1537-744X |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-314ae9ce04a94d10b93d3548f70fcbfb2025-08-20T03:55:00ZengWileyThe Scientific World Journal1537-744X2013-01-01201310.1155/2013/572140572140Pore Structure and Limit Pressure of Gas Slippage Effect in Tight SandstoneLijun You0Kunlin Xue1Yili Kang2Yi Liao3Lie Kong4State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, ChinaGas slip effect is an important mechanism that the gas flow is different from liquid flow in porous media. It is generally considered that the lower the permeability in porous media is, the more severe slip effect of gas flow will be. We design and then carry out experiments with the increase of backpressure at the outlet of the core samples based on the definition of gas slip effect and in view of different levels of permeability of tight sandstone reservoir. This study inspects a limit pressure of the gas slip effect in tight sandstones and analyzes the characteristic parameter of capillary pressure curves. The experimental results indicate that gas slip effect can be eliminated when the backpressure reaches a limit pressure. When the backpressure exceeds the limit pressure, the measured gas permeability is a relatively stable value whose range is less than 3% for a given core sample. It is also found that the limit pressure increases with the decreasing in permeability and has close relation with pore structure of the core samples. The results have an important influence on correlation study on gas flow in porous medium, and are beneficial to reduce the workload of laboratory experiment.http://dx.doi.org/10.1155/2013/572140 |
| spellingShingle | Lijun You Kunlin Xue Yili Kang Yi Liao Lie Kong Pore Structure and Limit Pressure of Gas Slippage Effect in Tight Sandstone The Scientific World Journal |
| title | Pore Structure and Limit Pressure of Gas Slippage Effect in Tight Sandstone |
| title_full | Pore Structure and Limit Pressure of Gas Slippage Effect in Tight Sandstone |
| title_fullStr | Pore Structure and Limit Pressure of Gas Slippage Effect in Tight Sandstone |
| title_full_unstemmed | Pore Structure and Limit Pressure of Gas Slippage Effect in Tight Sandstone |
| title_short | Pore Structure and Limit Pressure of Gas Slippage Effect in Tight Sandstone |
| title_sort | pore structure and limit pressure of gas slippage effect in tight sandstone |
| url | http://dx.doi.org/10.1155/2013/572140 |
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