b'AEGC 2023Short abstractsThe advantages of an automated well-to-seismic tiesuch as injectivity and monitoring, will be assessed later. The calibration process. integrated reservoir geoscience CCS site assessment workflow allows validation of various technologies on a local scale, with Andrea Paxton and Andrea Murineddu the option and feasibility to be expanded regionally. The main objective of this study is to evaluate the use of all the data Schlumberger (seismic and wells) for CO 2storage capacity and containment We present a case study from the Browse Basin offshoreassessment.Australia to demonstrate an automated well-to-seismic tieThe current PoC has been established using a regional multi-calibration process. The automation presented resulted in time- client broadband dataset in the North Sea which comprises efficient batch calibration of the time-to-depth relationshipan extensive cross border regional dataset covering the and wavelet estimation for multiple wells and seismic volumes.UK and Norway. The broadband nature of the seismic data The task of calibrating the well and seismic data is an essentialallows significant and efficient site assessment, by providing component in quantitative seismic reservoir characterisationdetailed descriptions and understanding of the subsurface, studies and for the integration of seismic attributes into sub- including more accurate/reliable pre-stack attributes for surface geological models. Accurate time-to-depth relationshipskey storage parameters such as sediment net-to-gross, and consistency between the seismic velocity and well-logporosity and thickness. All of this is determined mainly using velocity data is required for velocity modeling and domain- the seismic dataset and very few calibration wells. We will conversion workflows. To achieve this accuracy, traditionally thehighlight the key elements of the workflow starting from well-to-seismic tie task is a human-intensive and interpretativedata aspect, interpretation, rock physics, seismic inversion process which can be time consuming for large datasets. and more importantly the integration of all these aspects The approach presented automatically calibrated thefor mapping and characterisation of the CO 2container and time-depth relationship and performs wavelet estimation.containment.Statistical cross-correlation and predictability metrics were automatically generated to enable the assessmentAssessing geochemical reactivity during CO 2geological of the quality of the well tie and user quality control of the automation process. These include a geo-referenced trafficstorage: An example from the Surat Basin.light map for spatial well ranking. QC displays of the wellJulie Pearce 1 Grant Dawson2, Suzanne Golding2, Dirk Kirste3, synthetic seismogram, single and multi-well wavelets forGordon Southam2, David Paterson4, Frank Brink5 and Victor each seismic angle stack were also generated automatically.Rudolph6Geological and geophysical domain knowledge was used to analyse the diagnostic metrics and handle complex1 Centre for Natural Gas and SEES, University of Queensland challenges at wells with poor metrics through manual2 School of Earth and Environmental Sciences (SEES), University of tying efforts or the application of additional well log orQueensland seismic processing. Automation of the seismic-to-well tie3 Department of Earth Sciences, Simon Fraser University task provides the ability to generate time-to-depth4 Australian Synchrotron, ANSTO relationships and associated wavelets, which are calibrated5 Center for Advanced Microscopy, Australian National University to the seismic data in an unbiased manner. The automation6 School of Chemical Engineering, University of Queenslandreduces the turn-around-time from hours to minutes, with incremental time saving on larger datasets. This approachCO 2storage is part of the transition to lower emissions; minimises the burden of menial tasks on the geophysicistshowever, it necessitates a geochemical assessment of whilst quickly highlighting where their expertise is needed. potential site-specific impacts. Injected CO 2will dissolve into formation water and the resulting acidification can induce mineral dissolution and precipitation, alteration of porosity Integrated workflow for characterisation of CO 2 and permeability, or mobilisation of metals to groundwater. subsurface storage sites. Reactivity can depend on several factors including the captured gas stream composition, and mineralogical content. Nomie Pernin, Cyrille Reiser and Eric Mueller We present a comprehensive assessment methodology with a focus here on understanding metal mobilisation. Drill PGS core samples are characterised for minerals, poro-perm, The world requires carbon capture and storage (CCS) sites/ and for metals via total digestions; sequential extractions; facilities to achieve ambitious net carbon dioxide (CO 2 )and synchrotron X-ray Fluorescence Microscopy. Drill cores emissions goals. After CO 2capture and transport, subsurfaceare reacted at reservoir conditions with pure CO 2and the storage of CO 2in significant quantities requires identificationspecific greenhouse gas stream, e.g., CO 2 -SOx-NOx-O 2 . Kinetic of sufficiently largescale CCS sites. There are now less thangeochemical models are then history matched to experimental 30 sites worldwide storing around 40 Mt of CO 2 /year, and thedata that ultimately are inputs to a reactive transport model. expectation is to have close to 300 Mt storage capacity perThe Surat Basin Precipice Sandstone is undergoing feasibility year by 2050. Thus, there is an immediate need to identifystudies as a CO 2storage reservoir, and an example from a viable CCS storage sites. Efficient assessment of regional, highstorage site assessment is presented here. The Evergreen quality seismic information would be a significant step in thatFormation is the overlying cap-rock, and the Moolayember direction. Formation underlies the reservoir. The lower Precipice Sandstone is quartz-rich while the upper Precipice, Evergreen, We present a recent integrated G&G workflow over a proof- and the Moolayember formations are mineralogically diverse of-concept (PoC) area considering two aspects of the CCSwith higher feldspar, clay, and carbonate content. Dissolved storage: capacity and containment. Other aspects of CCS,elements Ca, Mg, Mn, Sr, and Ba increased in experiments from FEBRUARY 2023 PREVIEW 128'