Pre-Injection Assessment of Time-Lapse Seismic Repeatability at the Aquistore CO2 Storage Site - presentation by Lisa Roach of the University of Leeds at the UKCCSRC meeting Monitoring of the deep subsurface: leakage pathways – understanding and monitoring the mechanics of CO2 storage, 23 October 2014

1. Pre-Injection Assessment of
Time-Lapse Seismic Repeatability at the
Aquistore CO2 Storage Site
1

2. Overview of the Aquistore CO2 storage site
Data acquisition
Time-lapse repeatability results
2

3. 3
CO2 Capture
CO2 Injection

4. 4
Power
Generation
Capture Plant

5. Surface-based
Regional 3D seismic survey
Geological characterization
Baseline & time-lapse (?)
Permanent seismic array
Time-lapse imaging
Electrical/electromagnetic
Gravity
Passive seismic (broadband & short period array)
InSAR
GPS
Tiltmeters
Groundwater & Soil gas monitoring
Plume
5
Down-hole
Cross-well seismic & VSP
Cross-well & surface-to- downhole electrical monitoring
Real-time P & T
Passive seismic
Fluid sampling
Time-lapse logging
Distributed Acoustic/Temperature Sensors (DAS/DTS)
Heater cable
Gravity
Designed for: (1) project/plume monitoring; (2) public assurance; (3) research objectives
Deformation
Leakage
In Situ

6. Aquistore Project Timeline
Sep-11
Mar-12
Nov-12
Apr-13
Groundwater,
Soil Gas,
Passive Seismic
Permanent &
Baseline 3D
Seismic
Injection
Well
Site/Funding
Agreements
H2O Injection
Test
Observation
Well
Baseline VSP,
Monitor II 3D
Seismic
Aug-12
Today
GPS,
Tiltmeters
InSAR,
Piezometers
Crosswell Seismic,
Monitor I 3D
Seismic
Nov-13
Site characterization Baseline Surveys
CO2
Injection
2014
6

7. Goals of permanent array:
improve repeatability
demonstrate sparse array imaging
provide passive monitoring capability
7

8. 8
Midale Beds
Watrous “Red Beds”
Prairie Evaporite
Precambrian
Deadwood Formation
Colorado Shale
Depth: 3.4km

9. 9
630 geophones
Covers ~5 km2
20m depth
Rx lines 144m
In-line 72m

10. 260 shots
Covers ~6 km2
1 kg Dynamite
15m depth
Sx lines 288m
In-line 144m
Baseline – March, 2012
Monitor I – April, 2013
Monitor 2 – Nov, 2013
10

11. 11
Baseline
Monitor 1

12. Dataset Equalisation (Common source/receivers)
Trace Editing
Amplitude Scaling
Surface Consistent Amplitude Balancing
Bandpass Filtering
Surface Consistent Deconvolution
Bandpass Filtering
Refraction Statics (Common velocity model)
Surface Consistent Residual Statics
NMO Correction (Common velocity model)
CDP Stacking
Explicit FD 3D post stack migration
12

13. 13
Raw Stack
Migrated
Reservoir

14. 14
Baseline
Monitor 1
Difference

15. 15
풏푹푴푺 풗풂풍풖풆풔
풓풂풏품풆:ퟎ −ퟐ
Kragh and Khristie, 2002

16. 16
Cross-Equalised
Raw
Migrated
nRMS=0.09
nRMS=1.13
nRMS=0.13
Roach et al. 2015 Geophysics – in review
White et al. 2015 Geophysics – in review

17. 17
Monitoring Activities: Lisa Roach (GSC), S. Samsonov (CCRS), M. Craymer (CCRS), B. Roberts (GSC), J. Henton (CCRS), M. Czarnogorska, J. Silliker (CCRS), Tom Daley (LBNL), Michelle Robertson (LBNL), Chevron
Management: Petroleum Technology Research Centre (Kyle Worth, Neil Wildgust, Aleana Young, Joseph Lazlo)
Operations: Sask Power, Schlumberger Carbon Services (Jared Lee Walker, Marcia Couëslan, Bob Will, Wade Zaluski)
Science & Engineering Research Committee: Rick Chalaturnyk (U Alberta), Chris Hawkes (U Sask), Ben Rostron (U Alberta), Jim Johnson (Schlumberger-Dole), Jim Sorensen (EERC), Don White (GSC)
Contractors: Western-Geco, RPS Boyd-PetroSearch, Geospace, Silixa, Sercel, Tesla

18. 18
Thank You For Your Attention!