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Improved Microseismicity Detection During Newberry EGS Stimulations
Effective enhanced geothermal systems (EGS) require optimal fracture networks for efficient heat transfer between hot rock and fluid. Microseismic mapping is a key tool used to infer the subsurface fracture geometry. Traditional earthquake detection and location techniques are often employed to identify microearthquakes in geothermal regions. However, most commonly used algorithms may miss events if the seismic signal of an earthquake is small relative to the background noise level or if a microearthquake occurs within the coda of a larger event. Consequently, we have developed a set of algorithms that provide improved microearthquake detection. Our objective is to investigate the microseismicity at the DOE Newberry EGS site to better image the active regions of the underground fracture network during and immediately after the EGS stimulation. Detection of more microearthquakes during EGS stimulations will allow for better seismic delineation of the active regions of the underground fracture system. This improved knowledge of the reservoir network will improve our understanding of subsurface conditions, and allow improvement of the stimulation strategy that will optimize heat extraction and maximize economic return.
Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | public |
| bureauCode |
[
"019:20"
]
|
| contactPoint |
{
"fn": "Dennise Templeton",
"@type": "vcard:Contact",
"hasEmail": "mailto:templeton4@llnl.gov"
}
|
| dataQuality |
true
|
| description | Effective enhanced geothermal systems (EGS) require optimal fracture networks for efficient heat transfer between hot rock and fluid. Microseismic mapping is a key tool used to infer the subsurface fracture geometry. Traditional earthquake detection and location techniques are often employed to identify microearthquakes in geothermal regions. However, most commonly used algorithms may miss events if the seismic signal of an earthquake is small relative to the background noise level or if a microearthquake occurs within the coda of a larger event. Consequently, we have developed a set of algorithms that provide improved microearthquake detection. Our objective is to investigate the microseismicity at the DOE Newberry EGS site to better image the active regions of the underground fracture network during and immediately after the EGS stimulation. Detection of more microearthquakes during EGS stimulations will allow for better seismic delineation of the active regions of the underground fracture system. This improved knowledge of the reservoir network will improve our understanding of subsurface conditions, and allow improvement of the stimulation strategy that will optimize heat extraction and maximize economic return. |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "Earthquake Catalog.txt",
"format": "txt",
"accessURL": "https://gdr.openei.org/files/249/NewberryEGS_EQcatalog_Oct2012-Dec2012.txt",
"mediaType": "text/plain",
"description": "Earthquake catalog of events occurring between October - December 2012 within or near the Newberry EGS site. "
}
]
|
| DOI | 10.15121/1148810 |
| identifier | https://data.openei.org/submissions/6589 |
| issued | 2013-10-01T06:00:00Z |
| keyword |
[
"EGS",
"Newberry",
"earthquakes",
"fracture",
"geothermal",
"microseismic",
"microseismicity",
"monitoring",
"reservoir",
"seismic",
"seismicity",
"stimulation"
]
|
| landingPage | https://gdr.openei.org/submissions/249 |
| license | https://creativecommons.org/licenses/by/4.0/ |
| modified | 2019-11-14T23:19:07Z |
| programCode |
[
"019:006"
]
|
| projectLead | Lauren Boyd |
| projectNumber | FY13 AOP 25728 |
| publisher |
{
"name": "Lawrence Livermore National Laboratory",
"@type": "org:Organization"
}
|
| spatial |
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|
| title | Improved Microseismicity Detection During Newberry EGS Stimulations |
