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DOI | 10.1029/2019WR024794 |
Distributed Fiber Optic Sensing System for Well-Based Monitoring Water Injection Tests-A Geomechanical Responses Perspective | |
Sun, Yankun1,2; Xue, Ziqiu1,2; Hashimoto, Tsutomu1,2; Lei, Xinglin3; Zhang, Yi1,2 | |
2020 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2020 |
卷号 | 56期号:1 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan |
英文摘要 | In this study, distributed fiber optic sensing (DFOS) based on hybrid Brillouin-Rayleigh backscattering is examined for the first time in well-based monitoring distributed profiles of geomechanical deformation induced by water injection. Field water injection tests are conducted under different injection scenarios between an injection well (230 m, IW #2) and 5.5 m away from a fibered monitoring well (300 m, MW#1) by deploying cables behind the casing at Mobara, Japan. Effects of injection rate, pressure, and lithological heterogeneity on the geomechanical deformation are quantitatively monitored via a DFOS approach and indicate that induced strains significantly depend on injection rate and pressure. The results also indicate that DFOS results are reasonably consistent with simultaneous geophysical well logging data and corresponding numerical simulation. The extent of impacted areas and magnitude of near-wellbore strains are explored to evaluate formation heterogeneity and fluid migration behaviors. The field testing of hybrid DFOS technology is expected to definitely advance elaborate monitoring and wider applications, such as CO2 geosequestration sites. Plain Language Summary Geological CO2 storage (GCS) in deep saline aquifers is broadly recognized as possessing the potential to play a key role in mitigating anthropogenic climate change. Valid monitoring methods are important to characterize the spatial distribution of sequestered CO2 in underground reservoirs. In the study, hybrid Brillouin-Rayleigh scattering based on high-resolution distributed fiber optic sensing (DFOS) as an advanced monitoring tool to measure the distribution of temperature or strain is deployed behind casing to a depth of 300 m in an actual field ofMW#1 to detect the vertical profile of strain changes at various locations along the entire cable length. Water injection tests are implemented to inject water from adjacent injection well, IW #2 (approximately 5.5 m distance) toward the fibered MW #1. Results indicate that the impacted zones induced by water injection are expanded to the vertical formations near the fibered well, thereby assessing overlying and overlying sealing. Additionally, the induced strain magnitude and state are largely associated with the injection rate, pressure, and formation heterogeneity compare well with the results of well logging and numerical modeling. The DFOS-based downhole monitoring technology can capture continuous depth-based geomechanical deformation, which can serve as a valid indicator to track the migration of injected fluids and act as an early warning for potential fluid leakage. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000520132500019 |
WOS关键词 | CO2 STORAGE ; FLUID-FLOW ; DEFORMATION ; RESERVOIR ; SENSORS |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/280446 |
专题 | 资源环境科学 |
作者单位 | 1.Geol Carbon Dioxide Storage Technol Res Assoc, Kyoto, Japan; 2.Res Inst Innovat Technol Earth, Kyoto, Japan; 3.Geol Survey Japan, Natl Inst Adv Ind Sci & Technol AIST, Ibaraki, Japan |
推荐引用方式 GB/T 7714 | Sun, Yankun,Xue, Ziqiu,Hashimoto, Tsutomu,et al. Distributed Fiber Optic Sensing System for Well-Based Monitoring Water Injection Tests-A Geomechanical Responses Perspective[J]. WATER RESOURCES RESEARCH,2020,56(1). |
APA | Sun, Yankun,Xue, Ziqiu,Hashimoto, Tsutomu,Lei, Xinglin,&Zhang, Yi.(2020).Distributed Fiber Optic Sensing System for Well-Based Monitoring Water Injection Tests-A Geomechanical Responses Perspective.WATER RESOURCES RESEARCH,56(1). |
MLA | Sun, Yankun,et al."Distributed Fiber Optic Sensing System for Well-Based Monitoring Water Injection Tests-A Geomechanical Responses Perspective".WATER RESOURCES RESEARCH 56.1(2020). |
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