文章基本信息

标题：Laboratory-scale hydraulic fracturing dataset for benchmarking of enhanced geothermal system simulation tools
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作者：Paromita Deb ; Stephan Düber ; Carlo Guarnieri Calo’ Carducci 等
期刊名称：Scientific Data
电子版ISSN：2052-4463
出版年度：2020
卷号：7
期号：1
页码：1-9
DOI：10.1038/s41597-020-0564-x
语种：English
出版社：Nature Publishing Group
摘要：Successful design of enhanced geothermal systems (EGSs) requires accurate numerical simulation of hydraulic stimulation processes in the subsurface. To ensure correct prediction, the underlying model assumptions and constitutive relationships of simulators need to be verifed against experimental datasets. With the aim of generating laboratory-scale benchmark datasets, a state-of-the-art testing facility was developed, allowing for experiments under controlled conditions. Samples of size 30cm×30cm×45cm were subjected to confning stresses while high-pressure fuid was injected into the sample through a pre-drilled borehole, where a saw-cut notch was used to initiate a penny-shaped fracture. Fracture growth and propagation was monitored by measuring pressure data and acoustic emissions detected using 32 seismic sensors. Subsequently, samples were split along the fracture plane to outline the created fracture marked by a red-dyed injection fuid. Finally, a 2D fracture contour was generated using photogrammetry. Presented datasets, accessible via a public repository, include experiments on granite and marble samples. They can be used for verifying and improving numerical codes for feld stimulation designs.