3Introduction Apologies: BP - Olav Barkved, Tron Kristiansen, Allan Mathieson, Rob BissellMaersk – Jeremy Henderson, Adrian MerryMSI – Mike ThorntonPinnacle – Henry Bland
4Bristol Geophysics Group This talk is about the Bristol Seismology group which forms part of CETSEI research group within the department of Earth Sciences.
5Bristol Geophysics - people Prof. Michael Kendall - Applied and global seismologyProf. George Helffrich - Global seismologyDr. Heidy Mader - Geophysical fluid dynamicsDr. Matt Watson - Remote sensing, GISDr. Fiona Witaker - Carbonates, reactive transport modelling.Dr. Jeremy Phillips – Fluid dynamics of volcanological processesDr. Jo Gottsmann (Royal Society Fellow) - Microgravity, GPS, volcanologyDr. Alison Rust (Royal Society Fellow) – Physical volcanologyDr. James Wookey (European Research Chair) - Global and applied seismologyDr. Juliet Biggs (ESA fellow) - InSAR, geodesyDr. Nick Teanby (STFC Advanced Fellow) – Planetary sciences; remote sensing
6Bristol Seismology- people Dr. Alan Baird (Industry) – applied seismologyDr. Ian Bastow (Leverhulme) - global seismologyDr. Anna Stork (NERC) – applied seismologyDr. Andrew Walker (ERC) – mineral physicsDr. Anna Horleston (ERC) - seismology technicianDr. James Verdon (NERC) - CO2 sequestration (InSalah and Weyburn)Dr. Andrew Nowacki (ERC) - Lower mantle anisotropyJenny di Leo (EU) - Imaging the distribution of fluids and of the deformation above the active Indonesian subduction zoneJack Walpole (ERC) – Imaging the lowermost mantlePhil Usher (Industry) – microseismic monitoringDavid Schlaphorst (BGS) – Building and arc: The Antilles subduction zoneJack Dobinson (NERC) – Planet formationJenny Taylor (NERC) – Martian seismologyPablo Palacios (Ecuadorian gov) – Volcano monitoring
7Recent PhDsJames Verdon – geomechanics and microseismicity of CO2 sequestrationGlenn Jones – Ekofisk reservoir microseismicityOthman Al-Hassasi – Oman microseismiciyAndy Nowacki – Lowermantle anisotropyDavid Thompson – Architecture of Hudson BayRicardo Ramalho – Cape Verde islands
8Bristol Geophysics - some recent grants Kendall and Verdon, Still or sparkling: Microseismic monitoring of CO2 injection at In Salah - NERC partnership grant with BP, £300kKendall 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, £178kWitaker, Integrated reaction transport modelling of dolomite evolution, Industry Technology Facilitator (ITF), £464kWhitaker, Controls on carbonate connectivity, ExxonMobil, £185kWhitaker, CARB consortium, ExxonMobil, Chevron, ConocoPhilips, ~£200kSparks and Cashman, Volcanology Chair, AXA Research Fund, €618kSparks, Blundy and Rust, Understanding porphyry Cu deposits, BHP, £1.8M.
9Some recent papersVerdon, 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, , doi: /j.epsl , 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, , doi: /j 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.
10Some recent papersWuestefeld. 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: /j X 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, , doi: /j.egypro , 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.
12Proposed Work Packages Event location and characterisationSeismic anisotropy and attenuationExploiting the wider wavetrain - linked modellingGeomechanicsCO2 capture and storageGeothermal
13Event location and characterisation Improved locations: Multiplets, JHD, and clusters (de Meersman et al. 2009; Jones PhD 2011).Effects of velocity model, anisotropyArray designFocal mechanisms and moment tensor solutions - invert for the stress field.Non-double-couple solutions - fluid effects.
15Seismic anisotropyAutomated processing of large datasets (near real-time).Temporal variations in anisotropy.Frequency dependent effects - techniques and interpretation: poroelasticity vs. scatteringShear-wave splitting tomography.Fracture parameter inversionBn/Bt inversion
18Seismic attenuationQ estimates; spatial and temporal variations during fracking.Q anisotropy - relative variations in attenuation (e.g., Carter and Kendall, 2005).
19Exploiting the wider wavetrain Better exploiting the coda; converted waves; reflections.Waveform modellingFinite frequency modelling - 1-way wave equation (e.g., Angus et al).More efficient ray tracing (e.g., Chambers and Kendall, 2008).Full waveform modelling
20GeomechanicsLinked geomechanical, fluid-flow and seismic modelling (IPEGG)Applications to tight gas (GESER); CCS;Temporal and spatial variations in anisotropyEffects of faults or pre-existing planes of weaknessApplications to volcano monitoringFull field simulation and predictions of seismic attributes (Valhall)
21CO2 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.
22GeothermalPilot 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).
23Datasets Single well passive seismic monitoring Valhall; Ekofisk; Frack monitoringChinook Ridge; Cotton Valley; Peace River; Field X; Creelman (Canada); Field YCO2Aneth Oil Field, Utah; Field X; Weyburn; In SalahMultiple wellsOman; North Parkes, Australia; Cotton Valley, USALarger scale datasetsOntake volcano, Japan; Italy datasets; Alutu and Corbetti volcanoes, Ethiopia.
24DeliverablesThe 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 talksProgress reportsComprehensive final report