June 8, 2016

Groningen seismic dataset

Elmer Ruigrok, Bernard Dost, Jesper Spetzler, Laslo Evers, Gert-Jan van den Hazel, Jordi Domingo Ballesta

Induced seismicity in the Netherlands

Bourne et al. (JGR, 2014)

Groningen gas field

Groningen pre-2015 geophone network

Groningen event catalogue

Groningen new geophone network

Groningen new network status

75 m

Borehole FSW

30 m

Borehole NIW,

SPY, SUH

50 m

Borehole ENM,

ENV, HWF, VLW,

WDB, ZLV, G*

Borehole variation

Borehole EQ response

• Data resources

• Developments

• Conclusions

• Data resources

• Developments

• Conclusions

Zuidbroek 1.8 event

http://www.knmi.nl/nederland-nu/seismologie/aardbevingen

http://rdsa.knmi.nl/dataportal/

Event catalogue

http://rdsa.knmi.nl/fdsnws/event/1/

KNMI data retrieval with FDSN webservices

Station info

http://rdsa.knmi.nl/fdsnws/station/1/

Continuous data (last year) & event data

http://rdsa.knmi.nl/fdsnws/dataselect/1/

Depth of reservoir rock

Geologic model (DGM-

deep) made available

by TNO:

https://www.dinoloket.nl/

en/

Fault network

Geologic model (DGM-

deep) made available

by TNO:

https://www.dinoloket.nl/

en/

Faults & seismicity

Event catalogue with

induced events:

http://www.knmi.nl/kennis-

en-

datacentrum/dataset/aa

rdbevingscatalogus

• Data

• Developments

• Conclusions

1 = N

2 = EZ

Accelerometer

Orientation of horizontal components?

Geophones

N

φ

Estimating P-wave profile

Estimating S-wave profile

FSW

Enhancing detection

Enhancing detection; field data

FSW

• Data resources

• Developments

• Conclusions

Conclusions

Lots of data available

• > 300 3C geophones

• > 70 accelerometers

• Induced earthquake catalogue

• Event data

• Continuous data (1 year)

• Geologic model

Ungoing efforts to

• Facilitate data acces

• Improve network connection

• Publish near-surface model

• Publish sensor orientations

?

Phi estimation approach

Accelerometer Geophone

Phi estimation results

75 m

Section view at borehole FSWMap view, borehole locations

Borehole arrays

Borehole noise recording

FSW

Earthquake recording

FSW

Near-surface filter

.

.

.

Multi-depth-level solution

Enhancing detection; synthetics

Enhancing detection; synthetics

Prior to orientation correction

After orientation correction

Backup material

Borehole seismic interferometry

Borehole seismic interferometry

Estimate vp and vs of refracting layer

Supergather Z-comp Supergather N-comp

Vp=5.1 km/s

Vs=2.8 km/s

Spetzler, 2015

Spetzler, 2015

Spetzler, 2015