TY - JOUR

T1 - Research Note

T2 - Frequency domain orthogonal projection filtration of surface microseismic monitoring data

AU - Azarov, Anton V.

AU - Serdyukov, Aleksander S.

AU - Gapeev, Denis N.

PY - 2020/2

Y1 - 2020/2

N2 - We address the problem of increasing the signal-to-noise ratio during surface microseismic monitoring data processing. Interference from different seismic waves causes misleading results of microseismic event locations. Ground-roll suppression is particularly necessary. The standard noise suppression techniques assume regular and dense acquisition geometries. Many pre-processing noise suppression algorithms are designed for special types of noise or interference. To overcome these problems, we propose a novel general-purpose filtration method. The goal of this method is to amplify only the seismic waves that are excited in the selected target area and suppress all other signals. We construct a linear projector onto a frequency domain data subspace, which corresponds to the seismic emission of the target area. The novel filtration method can be considered an extension of the standard frequency–wavenumber flat wave filtration method for non-flat waves and arbitrary irregular receiver-position geometries. To reduce the effect of the uncertainty of the velocity model, we suggest using additional active shot data (typically the perforation shots), which provide static travel time corrections for the target area. The promising prospects of the proposed method are confirmed by synthetic and semi-synthetic data processing.

AB - We address the problem of increasing the signal-to-noise ratio during surface microseismic monitoring data processing. Interference from different seismic waves causes misleading results of microseismic event locations. Ground-roll suppression is particularly necessary. The standard noise suppression techniques assume regular and dense acquisition geometries. Many pre-processing noise suppression algorithms are designed for special types of noise or interference. To overcome these problems, we propose a novel general-purpose filtration method. The goal of this method is to amplify only the seismic waves that are excited in the selected target area and suppress all other signals. We construct a linear projector onto a frequency domain data subspace, which corresponds to the seismic emission of the target area. The novel filtration method can be considered an extension of the standard frequency–wavenumber flat wave filtration method for non-flat waves and arbitrary irregular receiver-position geometries. To reduce the effect of the uncertainty of the velocity model, we suggest using additional active shot data (typically the perforation shots), which provide static travel time corrections for the target area. The promising prospects of the proposed method are confirmed by synthetic and semi-synthetic data processing.

KW - Monitoring

KW - Noise

KW - Passive method

KW - Seismics

KW - Signal processing

KW - FIELD

KW - STATIC CORRECTIONS

UR - http://www.scopus.com/inward/record.url?scp=85069886218&partnerID=8YFLogxK

U2 - 10.1111/1365-2478.12847

DO - 10.1111/1365-2478.12847

M3 - Article

AN - SCOPUS:85069886218

VL - 68

SP - 382

EP - 392

JO - Geophysical Prospecting

JF - Geophysical Prospecting

SN - 0016-8025

IS - 2

ER -