Variations of attenuation and V-P/V-S ratio in the vicinity of wastewater injection: A case study of Costa Molina 2 well (High Agri Valley, Italy)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10390344" target="_blank" >RIV/00216208:11320/18:10390344 - isvavai.cz</a>
Alternative codes found
RIV/67985891:_____/18:00502459
Result on the web
<a href="https://doi.org/10.1190/GEO2017-0123.1" target="_blank" >https://doi.org/10.1190/GEO2017-0123.1</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1190/GEO2017-0123.1" target="_blank" >10.1190/GEO2017-0123.1</a>
Alternative languages
Result language
angličtina
Original language name
Variations of attenuation and V-P/V-S ratio in the vicinity of wastewater injection: A case study of Costa Molina 2 well (High Agri Valley, Italy)
Original language description
By analyzing seismicity induced by the injection of wastewater into the Costa Molina 2 well, we characterized attenuation in the area. Attenuation quality factors Q P and Q S were calculated using the peak-frequency method, which is suitable for small-magnitude earthquakes registered in the region. Anomalously high attenuation with values of effective Q(P) similar to 48 and Q(P) / Q(S) ratio of less than 1 in the vicinity of the injection well was found, in comparison with Q(P) similar to 60 for the rest of the region. Furthermore, the V-P / V-S ratio was also found to be high in the close vicinity of the injection well. We determine how sedimentary rocks possibly change their geomechanical properties due to salt-water injection and find that observed changes of attenuation (increase) and V-P / V-S ratio (increase) are consistent with the geomechanical models and experiments. Our findings indicate that the observed anomaly in the vicinity of the Costa Molina 2 well is due to the (1) changes of the properties of the rock mass affected by injection and (2) 3D structure in the overburden rocks.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10500 - Earth and related environmental sciences
Result continuities
Project
—
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Geophysics
ISSN
0016-8033
e-ISSN
—
Volume of the periodical
83
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
7
Pages from-to
"B25"-"B31"
UT code for WoS article
000443595400032
EID of the result in the Scopus database
2-s2.0-85038821007