Numerical Simulation of Channelization Near the Wellbore due to Seepage Erosion in Unconsolidated Sands during Fluid Injection
文献类型:期刊论文
作者 | Sun, Jin1; Wu, Shiguo1; Deng, Jingen2; Li, Qingping3; Fan, Qi3; Ma, Linwei1; Liu, Yanrui1 |
刊名 | GEOFLUIDS |
出版日期 | 2021-03-30 |
卷号 | 2021页码:13 |
ISSN号 | 1468-8115 |
DOI | 10.1155/2021/6634886 |
英文摘要 | The channels may be formed in the unconsolidated sands reservoir due to formation failure during high-pressure water injection or frac-packing. Based on the continuum mechanics, a mathematical model has been established to simulate the formation process of big channels in unconsolidated sands reservoir during fluid injection. The model considers the effect of reservoir heterogeneity, solid particles erosion, and deposition. The dynamic formation process of channels around the borehole and its influencing factors are analyzed by this model. The results indicate that the seepage erosion plays a very significant role in the formation of the channels during fluid injection for the unconsolidated sands with extremely low strength. The formation of the channels is closely related to the duration of fluid injection, injection pressure, reservoir heterogeneity, formation plugging, and critical fluid velocity. The long channels are more likely to form as injection time increases. Higher injection pressure will lead to higher flow rate, thus eroding the solid particles and forming big channels. The increase of the rock strength will enhance the value of critical fluid velocity, which makes it difficult for the occurrence of erosional channelization. The near-wellbore damage of the formation will decrease the flow rate, and the preferential flow channels are less likely to be induced under the same injection pressure when compared with undamaged formation. In addition, we also found that the reservoir heterogeneity is essential to the formation of preferential flow channels. The channels are especially prone to be formed in the regions with high porosity and permeability at the initial time. The study can provide a theoretical reference for the optimal design of high-pressure water injection or frac-packing operation in the unconsolidated sands reservoir. |
WOS关键词 | FRACTURE INITIATION ; BOHAI BAY ; MODEL ; SEDIMENT ; FLOW |
资助项目 | Hainan Provincial Natural Science Foundation of China[2018CXTD346] ; National Key Research and Development Program of China[2019YFC0312301] |
WOS研究方向 | Geochemistry & Geophysics ; Geology |
语种 | 英语 |
出版者 | WILEY-HINDAWI |
WOS记录号 | WOS:000639746000004 |
资助机构 | Hainan Provincial Natural Science Foundation of China ; National Key Research and Development Program of China |
版本 | 出版稿 |
源URL | [http://ir.idsse.ac.cn/handle/183446/8633] |
专题 | 深海科学研究部_深海地球物理与资源研究室 |
通讯作者 | Sun, Jin |
作者单位 | 1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Lab Marine Geophys & Georesource, Sanya 572000, Peoples R China 2.China Univ Petr, Dept Petr Engn, Beijing 102249, Peoples R China 3.CNOOC Res Inst Co Ltd, State Key Lab Nat Gas Hydrate, Beijing 100028, Peoples R China |
推荐引用方式 GB/T 7714 | Sun, Jin,Wu, Shiguo,Deng, Jingen,et al. Numerical Simulation of Channelization Near the Wellbore due to Seepage Erosion in Unconsolidated Sands during Fluid Injection[J]. GEOFLUIDS,2021,2021:13. |
APA | Sun, Jin.,Wu, Shiguo.,Deng, Jingen.,Li, Qingping.,Fan, Qi.,...&Liu, Yanrui.(2021).Numerical Simulation of Channelization Near the Wellbore due to Seepage Erosion in Unconsolidated Sands during Fluid Injection.GEOFLUIDS,2021,13. |
MLA | Sun, Jin,et al."Numerical Simulation of Channelization Near the Wellbore due to Seepage Erosion in Unconsolidated Sands during Fluid Injection".GEOFLUIDS 2021(2021):13. |
入库方式: OAI收割
来源:深海科学与工程研究所
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