Seismic velocity changes in the Groningen reservoir associated with distant drilling.

ABSTRACT: In this study, we show that passively recorded data of nearby passing trains by a deep borehole geophone array could be linked to fluctuations of the gas-water contact in the Groningen reservoir in The Netherlands. During a period of 1.5 months, changes of inter-geophone P-wave travel times were detected by deconvolution interferometry of the recorded train signals. P-to-S converted waves, obtained by deconvolution of the horizontal component by the vertical component at individual geophones, showed simultaneous variations. The observed travel-time changes could be related to fluctuations of the gas-water contact in the observation well caused by pressure variations at a well drilling 4.5 km away. The [Formula: see text] 3.5 day delay between drilling in the reservoir and the seismic respo

SUBMITTER: Zhou W 

PROVIDER: S-EPMC9585063 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature