BUMPS meeting

15-16 March, 2012

• Fire exits …

• Introductions.

Introduction

Apologies:• BP - Olav Barkved, Tron Kristiansen,

Allan Mathieson, Rob Bissell• Maersk – Jeremy Henderson, Adrian

Merry• MSI – Mike Thornton• Pinnacle – Henry Bland

Bristol Geophysics GroupBristol Geophysics Group

Bristol Geophysics - people• Prof. Michael Kendall - Applied and global seismology• Prof. George Helffrich - Global seismology• Dr. Heidy Mader - Geophysical fluid dynamics• Dr. Matt Watson - Remote sensing, GIS• Dr. Fiona Witaker - Carbonates, reactive transport modelling.• Dr. Jeremy Phillips – Fluid dynamics of volcanological processes • Dr. Jo Gottsmann (Royal Society Fellow) - Microgravity, GPS,

volcanology• Dr. Alison Rust (Royal Society Fellow) – Physical volcanology• Dr. James Wookey (European Research Chair) - Global and applied

seismology• Dr. Juliet Biggs (ESA fellow) - InSAR, geodesy• Dr. Nick Teanby (STFC Advanced Fellow) – Planetary sciences; remote

sensing

Bristol Seismology- people• Dr. Alan Baird (Industry) – applied seismology• Dr. Ian Bastow (Leverhulme) - global seismology• Dr. Anna Stork (NERC) – applied seismology• Dr. Andrew Walker (ERC) – mineral physics• Dr. Anna Horleston (ERC) - seismology technician• Dr. James Verdon (NERC) - CO2 sequestration (InSalah and Weyburn)• Dr. Andrew Nowacki (ERC) - Lower mantle anisotropy• Jenny di Leo (EU) - Imaging the distribution of fluids and of the deformation

above the active Indonesian subduction zone• Jack Walpole (ERC) – Imaging the lowermost mantle• Phil Usher (Industry) – microseismic monitoring• David Schlaphorst (BGS) – Building and arc: The Antilles subduction zone• Jack Dobinson (NERC) – Planet formation• Jenny Taylor (NERC) – Martian seismology• Pablo Palacios (Ecuadorian gov) – Volcano monitoring

Recent PhDs

• James Verdon – geomechanics and microseismicity of CO2 sequestration

• Glenn Jones – Ekofisk reservoir microseismicity• Othman Al-Hassasi – Oman microseismiciy• Andy Nowacki – Lowermantle anisotropy• David Thompson – Architecture of Hudson Bay• Ricardo Ramalho – Cape Verde islands

Bristol Geophysics - some recent grants

• Kendall and Verdon, Still or sparkling: Microseismic monitoring of CO2 injection at In Salah - NERC partnership grant with BP, £300k

• Kendall and Verdon - Passive seismic monitoring of CO2 injection: Weyburn phase II - Petroleum Research Technology Council Canada, $300k (co-PIs White, Geological Survey of Canada)

• Kendall and Hammond,  Danakil potash project – Seismic monitoring, BHP, ~85k • Kendall, Integration of advanced geomechanical-seismic modelling for improved lifecycle

performance of tight gas sand reservoirs, Industry Technology Facilitator (ITF), £590,000 (PI - Cain, Rockfield: Fisher, Leeds)

• Elliott, Analysis of trace metals and stable and radiogenic metal isotopes in hydrocarbons and source rocks, Shell, £178k

• Witaker, Integrated reaction transport modelling of dolomite evolution, Industry Technology Facilitator (ITF), £464k

• Whitaker, Controls on carbonate connectivity, ExxonMobil, £185k• Whitaker, CARB consortium, ExxonMobil, Chevron, ConocoPhilips, ~£200k• Sparks and Cashman, Volcanology Chair, AXA Research Fund, €618k • Sparks, Blundy and Rust, Understanding porphyry Cu deposits, BHP, £1.8M.

Some recent papers• Verdon, J. P., J-M. Kendall, D. J. White and D. A. Angus, Linking

microseismic event observations with geomechanical models to minimise the risks of storing CO2 in geological formations, Earth Planet. Sci. Lett., 305, 143-152, doi: 10.1016/j.epsl.2011.02.048, 2011.

• Verdon, J. P. and J-M. Kendall, Detection of multiple fracture sets in oil reservoirs using seismic anisotropy imaged by microearthquakes, Geophys. Prosp., 59, 593-608, doi: 10.1111/j.1365-2478.2010.00943.x, 2011.

• Wuestefeld, A., J-M. Kendall, J. P. Verdon and A. van As, Temporal variations in seismic anisotropy and fracture characteristics: Observations from the mining industry, in press Geophys. J. Int., 2011.

• Kendall, M., S. Maxwell, G. Foulger, L. Eisner and Z. Lawrence, Microseismicity: Beyond dots in a box – Introduction, Geophysics, 76, WC1-WC3, 2011.

Some recent papers• Wuestefeld. A., J. P. Verdon, J-M. Kendall, J. Rutledge, H. Clarke and J. Wookey,

Inferring rock fracture evolution during reservoir stimulation from seismic anisotropy, Geophysics, 76, WC157-WC166, 2011.

• Al-Harrasi, O. H., J-M. Kendall and M. Chapman, Fracture characterisation using frequency-dependent shear-wave anisotropy analysis of microseismic data, Geophys. J. Int., 85, 1059–1070, doi: 10.1111/j.1365-246X.2011.04997.x, 2011.

• White, D. J., M. Meadows, S. Cole, A. Ramirez, Y. Hao, S. Carle, A. Duxbury, C. Samson, J-M. Kendall, J.P. Verdon, B. Dietker, T. Urbancic, J. Johnson and I. Morozov, Geophysical monitoring of the Weyburn CO2 flood: Results during 10 years of injection, Energy Procedia, 4, 3628-3635, doi:10.1016/j.egypro.2011.02.293, 2011.

• Angus, D. A., J. P. Verdon, Q. J. Fisher, J-M. Kendall, J. M. Segura, T. G. Kristiansen, A. J. L. Crook, S. Skachov, J. Yu and M. Dutko, Integrated fluid-flow, geomechanic and seismic modeling for reservoir characterization, Can Soc. Explor. Geophys. - Recorder, 26-35, May, 2011.

Dinner – Albion Pub, Clifton, BS8 4AA

Earth SciencesWills Memorial Bldg

• Event location and characterisation • Seismic anisotropy and attenuation• Exploiting the wider wavetrain -

linked modelling• Geomechanics

• CO2 capture and storage

• Geothermal

Proposed Work Packages

Event location and characterisation

• Improved locations: Multiplets, JHD, and clusters (de Meersman et al. 2009; Jones PhD 2011).

• Effects of velocity model, anisotropy• Array design• Focal mechanisms and moment tensor

solutions - invert for the stress field.• Non-double-couple solutions - fluid

effects.

Compaction?

Yibal: 43 fault plane solutions

Al-Anboori and Kendall, 2010

Seismic anisotropy

• Automated processing of large datasets (near real-time).

• Temporal variations in anisotropy.• Frequency dependent effects -

techniques and interpretation: poroelasticity vs. scattering

• Shear-wave splitting tomography.• Fracture parameter inversion• Bn/Bt inversion

Temporal Variations

Time (hours)

BUMPS Workflow

tt-picks particle motion locate events

shear-wave splitting analysis

frequency dependent anisotropy

fracture inversion

event location

shear-wave splitting

synthesisgeomechanical

modelintegration with

other datainterpretation

Seismic attenuation

• Q estimates; spatial and temporal variations during fracking.

• Q anisotropy - relative variations in attenuation (e.g., Carter and Kendall, 2005).

Exploiting the wider wavetrain • Better exploiting the coda; converted

waves; reflections.

Waveform modelling

• Finite frequency modelling - 1-way wave equation (e.g., Angus et al).• More efficient ray tracing (e.g., Chambers and Kendall, 2008).• Full waveform modelling

Geomechanics

• Linked geomechanical, fluid-flow and seismic modelling (IPEGG)

• Applications to tight gas (GESER); CCS; • Temporal and spatial variations in

anisotropy• Effects of faults or pre-existing planes of

weakness• Applications to volcano monitoring• Full field simulation and predictions of

seismic attributes (Valhall)

CO2 capture and storage

• Continued work on Weyburn (funding renewed).

• Work on In Salah (Krechba) with BP (new NERC funding).

• Links between microseismicity, geomechanics, and ground deformation (InSAR) (e.g., Verdon et al. 2011; Angus et al., 2011).

• Risk analysis - BRISK.

Geothermal

• Pilot project with sites in Ethiopia (Alutu and Corbetti volcanoes).

• Capacity building for developing country.

• Good scientific links already.• Instruments from UK pool.• Links between seismicity, SWS, InSAR

anomalies and MT (Zurich).

DatasetsSingle well passive seismic monitoring• Valhall; Ekofisk; Frack monitoring• Chinook Ridge; Cotton Valley; Peace River; Field

X; Creelman (Canada); Field YCO2

• Aneth Oil Field, Utah; Field X; Weyburn; In SalahMultiple wells• Oman; North Parkes, Australia; Cotton Valley,

USALarger scale datasets• Ontake volcano, Japan; Italy datasets; Alutu and

Corbetti volcanoes, Ethiopia.

DeliverablesThe primary deliverable for this project is knowledge

transfer of research findings, guidelines and algorithms for the best exploitation of microseismic data. This will come in the following forms:

• A password-protected website for the consortium (http://www1.gly.bris.ac.uk/BUMPS).

• Regular sponsors meetings (every 12 months). • Presentations and talks • Progress reports • Comprehensive final report

Next meeting

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