WITHDRAWN Network Design for Seismic Activity Monitoring in an Unconventional Oil Reservoir Exploitation Context
Description:
WITHDRAWN Historically, the seismicity in Argentina is mainly concentrated in the central, western and north-western regions of the country. Important destructive earthquake with maximum intensity IX (Mercalli Modify scale) have seriously affected major cities, including San Juan, Mendoza and Salta. This concentration of seismic hazard in Argentina is also reflected in the distribution of seismic stations with more than 60% of stations located in the center, west and northwest of Argentina. Consequently, the entire south and east of the country have almost no-coverage for detecting and locating local seismicity, where the official catalogue is considered complete for magnitudes ML ≥ 3.5.
Since 2015, many infrequent earthquakes were reported in the Neuquén province in the south-west of Argentina. Local authorities of the province requested the National Institute of Seismic Prevention (INPRES, Argentina) to design a seismic network to better monitor felt events and to explore a possible relation with hydraulic fracturing. The latter is a method employed to produce oil and gas from unconventional shale reservoirs. To establish the seismic network, we used published criteria and applied a Network Quality Metric parameter (ΔU) defined by Bondár and McLaughlin for each point of the region of interest. We will report results from the seismic network design and the deployment of 26 permanent broad-band seismometers. The new network ensures precise seismic locations in a region of more than 15.000 km2. The seismic network sensitivity allows to detect and locate earthquakes automatically with magnitude ML ≥ 1.5. Real lateral location errors are less than 5 km in the region of interest. Relocation and manual seismic data reprocessing allows to reduce these errors down to 1 to 3 km.
Session:
Type:
Date:
Presentation Time: (local time)
Presenting Author: Gerardo
Student Presenter: No
Invited Presentation:
Poster Number:
Authors
Gerardo Sánchez Presenting Author Corresponding Author gsanchez@inpres.gob.ar National University of San Juan |
Rodolfo García rgarcia@inpres.gob.ar National University of San Juan |
Marcelo Moreno mmoreno@inpres.gob.ar National University of San Juan |
Silvia Moreno smoreno@inpres.gob.ar National University of San Juan |
Luis Andújar landujar@inpres.gob.ar National University of San Juan |
Miguel Gaitán magaitan@inpres.gob.ar National University of San Juan |
Ricardo Sifón rsifon@inpres.gob.ar National University of San Juan |
Valeria Nicolía vnicolia@inpres.gob.ar National University of San Juan |
José Pirri jpirri@inpres.gob.ar National University of San Juan |
Juan P Aguiar jpaguiar@inpres.gob.ar National University of San Juan, San Juan, Argentina |
WITHDRAWN Network Design for Seismic Activity Monitoring in an Unconventional Oil Reservoir Exploitation Context
Session
Network Seismology: Recent Developments, Challenges and Lessons Learned