Role of Gas Viscosity for Shale Gas Percolation
Viscosity is an important index to evaluate gas flowability. In this paper, a double-porosity model considering the effect of pressure on gas viscosity was established to study shale gas percolation through reservoir pressure, gas velocity, and bottom hole flowing pressure. The experimental results...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2020/8892461 |
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| author | Xiaoming Wang Junbin Chen Dazhong Ren Zhaolong Shi |
| author_facet | Xiaoming Wang Junbin Chen Dazhong Ren Zhaolong Shi |
| author_sort | Xiaoming Wang |
| collection | DOAJ |
| description | Viscosity is an important index to evaluate gas flowability. In this paper, a double-porosity model considering the effect of pressure on gas viscosity was established to study shale gas percolation through reservoir pressure, gas velocity, and bottom hole flowing pressure. The experimental results show that when pressure affects gas viscosity, shale gas viscosity decreases, which increases the percolation velocity and pressure drop velocity of the free state shale gas in matrix and fracture systems. And it is conducive to the desorption of adsorbed shale gas and effectively supplemented the bottom hole flowing pressure with the pressure wave propagation range and velocity increasing, so that the rate of pressure drop at the bottom of the well slows down, which makes the time that bottom hole flowing pressure reaches stability shortened. Therefore, the gas viscosity should be fully considered when studying the reservoir gas percolation. |
| format | Article |
| id | doaj-art-95a355b3f037450b9fc3c0acbd6510d5 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-95a355b3f037450b9fc3c0acbd6510d52025-02-03T06:46:18ZengWileyGeofluids1468-81151468-81232020-01-01202010.1155/2020/88924618892461Role of Gas Viscosity for Shale Gas PercolationXiaoming Wang0Junbin Chen1Dazhong Ren2Zhaolong Shi3College of Geology and Environment, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, ChinaShaanxi Key Laboratory of Well Stability and Fluid & Rock Mechanics in Oil and Gas Reservoirs, Xi’an Shiyou University, Xi'an, Shaanxi 710065, ChinaShaanxi Key Laboratory of Well Stability and Fluid & Rock Mechanics in Oil and Gas Reservoirs, Xi’an Shiyou University, Xi'an, Shaanxi 710065, ChinaShaanxi Key Laboratory of Well Stability and Fluid & Rock Mechanics in Oil and Gas Reservoirs, Xi’an Shiyou University, Xi'an, Shaanxi 710065, ChinaViscosity is an important index to evaluate gas flowability. In this paper, a double-porosity model considering the effect of pressure on gas viscosity was established to study shale gas percolation through reservoir pressure, gas velocity, and bottom hole flowing pressure. The experimental results show that when pressure affects gas viscosity, shale gas viscosity decreases, which increases the percolation velocity and pressure drop velocity of the free state shale gas in matrix and fracture systems. And it is conducive to the desorption of adsorbed shale gas and effectively supplemented the bottom hole flowing pressure with the pressure wave propagation range and velocity increasing, so that the rate of pressure drop at the bottom of the well slows down, which makes the time that bottom hole flowing pressure reaches stability shortened. Therefore, the gas viscosity should be fully considered when studying the reservoir gas percolation.http://dx.doi.org/10.1155/2020/8892461 |
| spellingShingle | Xiaoming Wang Junbin Chen Dazhong Ren Zhaolong Shi Role of Gas Viscosity for Shale Gas Percolation Geofluids |
| title | Role of Gas Viscosity for Shale Gas Percolation |
| title_full | Role of Gas Viscosity for Shale Gas Percolation |
| title_fullStr | Role of Gas Viscosity for Shale Gas Percolation |
| title_full_unstemmed | Role of Gas Viscosity for Shale Gas Percolation |
| title_short | Role of Gas Viscosity for Shale Gas Percolation |
| title_sort | role of gas viscosity for shale gas percolation |
| url | http://dx.doi.org/10.1155/2020/8892461 |
| work_keys_str_mv | AT xiaomingwang roleofgasviscosityforshalegaspercolation AT junbinchen roleofgasviscosityforshalegaspercolation AT dazhongren roleofgasviscosityforshalegaspercolation AT zhaolongshi roleofgasviscosityforshalegaspercolation |