Investigation of Fracture Width Change under Closure Pressure in Unconventional Reservoir Based on the Hertz Contact Theory
To describe the fracture width is crucial for the flow conductivity evaluation, which influences the exploitation efficiency of unconventional oil and gas resources. Commonly, as the proppants fill in the fracture, the deformation will happen under the closure pressure to resist the fracture width 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/10.1155/2021/1268352 |
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| _version_ | 1832549204388478976 |
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| author | Lifei Dong Di Wang Fengxia Li Xinye Fu Miao Wang |
| author_facet | Lifei Dong Di Wang Fengxia Li Xinye Fu Miao Wang |
| author_sort | Lifei Dong |
| collection | DOAJ |
| description | To describe the fracture width is crucial for the flow conductivity evaluation, which influences the exploitation efficiency of unconventional oil and gas resources. Commonly, as the proppants fill in the fracture, the deformation will happen under the closure pressure to resist the fracture width change. Therefore, it is significant to develop the theoretical model to predict the variation. In this work, the mathematical model for the propping behavior of proppants in the fracture under closure pressure is established based on the Hertz contact theory. Compared with the existing models, the developed model considers both the proppant insertion and the elastic compression among the proppants, which is closer to the actual physical process. Furthermore, the experimental cases with different proppant sizes are taken to verify the model, and the good conformity presents its rationality. The parameter sensitivity analysis of this model shows that the fracture width change increases with the increase of the average diameters of proppants (D) and it declines with the improving of proppant elasticity modulus (E1) and Poisson’s ratio (v1). |
| format | Article |
| id | doaj-art-e584bbfaa2924a92be354da927d1cc79 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-e584bbfaa2924a92be354da927d1cc792025-02-03T06:11:58ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/12683521268352Investigation of Fracture Width Change under Closure Pressure in Unconventional Reservoir Based on the Hertz Contact TheoryLifei Dong0Di Wang1Fengxia Li2Xinye Fu3Miao Wang4State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, ChinaState Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, ChinaState Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, ChinaCollege of Civil Engineering, Chongqing University, Chongqing 400044, ChinaCollege of Mathematics and Statistics, Chongqing Three Gorges University, Chongqing 404120, ChinaTo describe the fracture width is crucial for the flow conductivity evaluation, which influences the exploitation efficiency of unconventional oil and gas resources. Commonly, as the proppants fill in the fracture, the deformation will happen under the closure pressure to resist the fracture width change. Therefore, it is significant to develop the theoretical model to predict the variation. In this work, the mathematical model for the propping behavior of proppants in the fracture under closure pressure is established based on the Hertz contact theory. Compared with the existing models, the developed model considers both the proppant insertion and the elastic compression among the proppants, which is closer to the actual physical process. Furthermore, the experimental cases with different proppant sizes are taken to verify the model, and the good conformity presents its rationality. The parameter sensitivity analysis of this model shows that the fracture width change increases with the increase of the average diameters of proppants (D) and it declines with the improving of proppant elasticity modulus (E1) and Poisson’s ratio (v1).http://dx.doi.org/10.1155/2021/1268352 |
| spellingShingle | Lifei Dong Di Wang Fengxia Li Xinye Fu Miao Wang Investigation of Fracture Width Change under Closure Pressure in Unconventional Reservoir Based on the Hertz Contact Theory Geofluids |
| title | Investigation of Fracture Width Change under Closure Pressure in Unconventional Reservoir Based on the Hertz Contact Theory |
| title_full | Investigation of Fracture Width Change under Closure Pressure in Unconventional Reservoir Based on the Hertz Contact Theory |
| title_fullStr | Investigation of Fracture Width Change under Closure Pressure in Unconventional Reservoir Based on the Hertz Contact Theory |
| title_full_unstemmed | Investigation of Fracture Width Change under Closure Pressure in Unconventional Reservoir Based on the Hertz Contact Theory |
| title_short | Investigation of Fracture Width Change under Closure Pressure in Unconventional Reservoir Based on the Hertz Contact Theory |
| title_sort | investigation of fracture width change under closure pressure in unconventional reservoir based on the hertz contact theory |
| url | http://dx.doi.org/10.1155/2021/1268352 |
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