A fracture conductivity model for channel fracturing and its implementation with Discrete Element Method
文献类型：期刊论文
| 作者 | Zhu HY ; Shen JD; Zhang FS
|
| 刊名 | JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
 |
| 出版日期 | 2019 |
| 卷号 | 172页码:149-161 |
| 关键词 | Channel fracturing Proppant pillar Fracture conductivity Optimization Discrete element method |
| ISSN号 | 0920-4105 |
| DOI | 10.1016/j.petrol.2018.09.054 |
| 英文摘要 | This paper introduces a new method to predict conductivity in channel fracturing by implementing analytical solution in Discrete Element Method (DEM). First, an analytical model for channel fracturing conductivity is proposed. Then, a DEM model calibrated by using experimental results is set up to investigate the deformation of proppant pillar. Finally, the analytical model of fracture conductivity is implemented in the DEM model to predict conductivity during fracture closing. Parametric analyses are carried out to understand the effects of four factors: proppant size combination, concentration, time ratio tau and elastic modulus to stress ratio lambda. Conductivity generally decreases during fracture closing and increases with the increasing proppant size and proppant concentration. The ratio of the pulsing time of proppant laden fluid to the pulsing time of the clean fluid is the key parameter for the field operation. A large time ratio could enhance the pillar stability though it may lead to the damage of fracture conductivity. For given rock modulus, closing stress and proppant size, the optimal range of time ratio can be given as a guidance for field operation. The field application of channel fracturing in the Shengli Oilfield proves that the optimized range of time ratio tau based on the proposed theoretical model is valid. The porosity of proppant pillar first decreases due to compression and then increases during fracture closing period because of the breakdown of the proppant pillar and the resulted particle movement outward. This paper gives insights for understanding the channel fracture conductivity and provides a practical tool for the optimization of channel fracturing design in the field. |
| 分类号 | 一类 |
| WOS关键词 | MECHANICAL STABILITY ; PROPPANT EMBEDMENT ; SIMULATION |
| WOS研究方向 | Energy & Fuels ; Engineering, Petroleum |
| 语种 | 英语 |
| WOS记录号 | WOS:000447888300014 |
| 资助机构 | National Key Basic Research Program of China (973 Program) [2014CB239205] ; National Natural Science Foundation of China [51604232, 41772286] ; China Postdoctoral Science Foundation [2017M610117] |
| 其他责任者 | Zhang, FS |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/78472]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.{Zhu, Haiyan、Shen, Jiadong} Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610500, Sichuan, Peoples R China 2.{Zhu, Haiyan} Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China 3.{Zhang, Fengshou} Tongji Univ, Dept Geotech Engn, Shanghai 200092, Peoples R China 4.{Zhang, Fengshou} Minist Educ, Key Lab Geotech & Underground Engn, Shanghai 200092, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu HY,Shen JD,Zhang FS. A fracture conductivity model for channel fracturing and its implementation with Discrete Element Method[J]. JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,2019,172:149-161. |
| APA | Zhu HY,Shen JD,&Zhang FS.(2019).A fracture conductivity model for channel fracturing and its implementation with Discrete Element Method.JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING,172,149-161. |
| MLA | Zhu HY,et al."A fracture conductivity model for channel fracturing and its implementation with Discrete Element Method".JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING 172(2019):149-161. |
入库方式： OAI收割
来源：力学研究所
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