Microtremor Survey Method: A New Approach for Geothermal Exploration
Geothermal resources are a type of sustainable and green energy, which can play an important role in emission peaks and carbon neutrality. Determining the best development target area is key to resource development and geophysical methods are commonly used for this purpose. Owing to serious human an...
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| Format: | Article |
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Frontiers Media S.A.
2022-01-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.817411/full |
| _version_ | 1798015500091916288 |
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| author | Tian Baoqing Tian Baoqing Ding Zhifeng Ding Zhifeng Yang Liming Fan Yifan Zhang Bo |
| author_facet | Tian Baoqing Tian Baoqing Ding Zhifeng Ding Zhifeng Yang Liming Fan Yifan Zhang Bo |
| author_sort | Tian Baoqing |
| collection | DOAJ |
| description | Geothermal resources are a type of sustainable and green energy, which can play an important role in emission peaks and carbon neutrality. Determining the best development target area is key to resource development and geophysical methods are commonly used for this purpose. Owing to serious human and industrial interference, the microtremor survey method is often adopted for geothermal exploration in urban areas. It is a passive source method, which is non-invasive and environmentally friendly. In this method, the Rayleigh wave dispersion curve is extracted using spatial autocorrelation based on the vertical component signal at the observation station. A genetic algorithm is used to invert the dispersion curve of one survey point to obtain strata parameters such as layer thickness, S-wave velocity, and density. It provides critical parameters for the cap layer and reservoirs for geothermal exploration. For a chain microtremor measurement, a two-dimensional (2D) apparent S-wave velocity section can be generated. The apparent S-wave velocity is calculated from the phase velocity using the following empirical method: the 2D apparent S-wave velocity section helps to identify the buried channel for heat flow and track the irregular shapes of the reservoirs or cap layers. It has been verified that the microtremor survey method is reliable and accurate compared with borehole materials. As a newly developed non-invasive geophysical method, it can be widely used in geothermal exploration. |
| first_indexed | 2024-04-11T15:34:24Z |
| format | Article |
| id | doaj.art-4276219221ec4ba186a3aa2395c581b2 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-04-11T15:34:24Z |
| publishDate | 2022-01-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Earth Science |
| spelling | doaj.art-4276219221ec4ba186a3aa2395c581b22022-12-22T04:16:02ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632022-01-011010.3389/feart.2022.817411817411Microtremor Survey Method: A New Approach for Geothermal ExplorationTian Baoqing0Tian Baoqing1Ding Zhifeng2Ding Zhifeng3Yang Liming4Fan Yifan5Zhang Bo6Institute of Geophysics, China Earthquake Administration, Beijing, ChinaKey Laboratory of Earthquake Source Physics, China Earthquake Administration, Beijing, ChinaInstitute of Geophysics, China Earthquake Administration, Beijing, ChinaKey Laboratory of Earthquake Source Physics, China Earthquake Administration, Beijing, ChinaInstitute of Science and Technology, China Three Gorges Corporation, Beijing, ChinaInstitute of Science and Technology, China Three Gorges Corporation, Beijing, ChinaInstitute of Science and Technology, China Three Gorges Corporation, Beijing, ChinaGeothermal resources are a type of sustainable and green energy, which can play an important role in emission peaks and carbon neutrality. Determining the best development target area is key to resource development and geophysical methods are commonly used for this purpose. Owing to serious human and industrial interference, the microtremor survey method is often adopted for geothermal exploration in urban areas. It is a passive source method, which is non-invasive and environmentally friendly. In this method, the Rayleigh wave dispersion curve is extracted using spatial autocorrelation based on the vertical component signal at the observation station. A genetic algorithm is used to invert the dispersion curve of one survey point to obtain strata parameters such as layer thickness, S-wave velocity, and density. It provides critical parameters for the cap layer and reservoirs for geothermal exploration. For a chain microtremor measurement, a two-dimensional (2D) apparent S-wave velocity section can be generated. The apparent S-wave velocity is calculated from the phase velocity using the following empirical method: the 2D apparent S-wave velocity section helps to identify the buried channel for heat flow and track the irregular shapes of the reservoirs or cap layers. It has been verified that the microtremor survey method is reliable and accurate compared with borehole materials. As a newly developed non-invasive geophysical method, it can be widely used in geothermal exploration.https://www.frontiersin.org/articles/10.3389/feart.2022.817411/fullgeothermal resourcesexplorationmicrotremor survey methodstrata parametersburied channel |
| spellingShingle | Tian Baoqing Tian Baoqing Ding Zhifeng Ding Zhifeng Yang Liming Fan Yifan Zhang Bo Microtremor Survey Method: A New Approach for Geothermal Exploration Frontiers in Earth Science geothermal resources exploration microtremor survey method strata parameters buried channel |
| title | Microtremor Survey Method: A New Approach for Geothermal Exploration |
| title_full | Microtremor Survey Method: A New Approach for Geothermal Exploration |
| title_fullStr | Microtremor Survey Method: A New Approach for Geothermal Exploration |
| title_full_unstemmed | Microtremor Survey Method: A New Approach for Geothermal Exploration |
| title_short | Microtremor Survey Method: A New Approach for Geothermal Exploration |
| title_sort | microtremor survey method a new approach for geothermal exploration |
| topic | geothermal resources exploration microtremor survey method strata parameters buried channel |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.817411/full |
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