The Statistical Fingerprint of Fluid-Injection Operations on Microseismic Activity at the Val d’Agri Oil Field (Southern Italy)

In this paper, we examined the dynamical properties of fluid-injection microseismicity at Val d’Agri oil field (southern Italy) by applying different statistical methods to find correlations and common periodicities with injection parameters, such as injected volumes pressure. Two periods observation were analyzed: (1) from 2006 2015 (the first 10 years after beginning operations), seismicity was recorded seismic network ENI company that manages exploitation oilfield; (2) 2016 2018, a denser capable significantly reducing completeness magnitude. If significant correlation between variables found in period, second activity characterized reservoir acidification for rates above 1900 m3/day. Finally, applied compared two approaches proposed literature forecast maximum expected The results showed one yielded an estimated magnitude Mmax = 1.7 ± 0.4, which is consistent observed