← Back to Sessions

WITHDRAWN Ambient Noise Monitoring in a Region of Disposal-induced Seismicity, Central Alberta

Description: 

WITHDRAWN Ambient seismic noise has been shown to be a useful tool for monitoring subtle changes in
the subsurface that are reflected in changes in seismic wave properties. Here, we aim to use
ambient noise to characterize reservoir response to sustained fluid injection, and in particular
wastewater disposal, over a number of years. Central Alberta has observed an increase in the
rate of seismic events since the end of 2019, believed to be associated with water disposal.
Using continuous seismic data from January 2019 to August 2021, we calculate the relative
change in seismic velocity over time. Our initial results suggest a correlation between velocity
changes and seismicity rate; by using an histogram grouping the sum of events for seven
days, and compare it to the stacking of the cross-correlation functions over the same number
of days. Initial observations go in accordance to the fracture theory where relative wave
velocities go down as a reservoir fractures and up as it heals. Nonetheless, these change occur
in syncronic way making the observations undesirable for early warning systems. Finally,
future plans include utilizing high performance computing and cuda processing to cut down
on computational time.

Session: Advances in Characterizing Seismic Hazard and Forecasting Risk in Hydrocarbon Systems [Poster]

Type: Poster

Date: 4/18/2023

Presentation Time: 08:00 AM (local time)

Presenting Author: Jesus Rojas-Parra

Student Presenter: Yes

Invited Presentation: 

Authors