b'AEGC 2021Short abstractsWe start from the premise that the move from cable-basedand by deriving regional burial trends and depth-dependent telemetry seismic acquisition systems with connected strings ofcalibrations between different velocity sources.geophones to nodal, single sensor recording, has not been fullyAn example from the Campos Basin, Brazil, shows how well data developed (or exploited?) by the seismic industry. Despitealone can underpin time-to-depth conversion to reveal hidden the dramatic changes of the last decade being reflected bystructures below shelf-slope breaks and salt diapirs, while the plethora of nodal systems on offer and their increasedsimultaneously addressing the interpretation of amplitudes for use globally, the benefits of the shift in technology have notprospect definition and derisking. An example from the Browse been fully realised. We will present that opportunity exists toBasin, Australia shows how velocities derived from well-data be more creative in the approaches taken in acquisition andcan help to QC processing velocities, which can then be more quality control of surface seismic nodal data and subsequentconfidently used to identify likely overpressured zones. More data processing. efficient, and thus sustainable, exploration could result from Data processing techniques have also evolved to encompasstreating velocities as a valuable geophysical dataset rather than geometry irregularity using real world coordinates rather thansolely as a by-product of seismic processing.nominal assumed regular spacing. These methods, particularly multi-dimensional regularisation and interpolation, enables40: Examples of integrating hyperspectral, geochemical more freedom for both macro and micro geometry and therebyand petrophysical drill core data using Australias opportunity for more efficient acquisition. National Virtual Core Library infrastructureThe use of automation is discussed along with challenging the linear approach typically taken in project execution,Dr Carsten Laukamp, Dr Jessica Stromberg, Mr Neil Francis, also the movement of some field-based support tasksMr Shane Mul1, Ms Monica LeGras, Dr Juerg Hauser2 and to the town office and a new look at implementation ofDrIan Lau3field quality control measures along with their related1 Mineral Resources, CSIROspecifications. 2 CSIRO MineralsThis paper therefore explores the entire seismic survey process3 CSIROfrom the planning stages, including the setting of qualityDrill core analytical tools are used for objectively measuring control specifications and how in field activities automation cangeoscience parameters that aid mineral exploration or be implemented, examples will be given. groundwater research. Multiple types of geoscience The objective of this new collective approach is primarilyparameters are frequently compared alongside each other, to make onshore seismic data acquisition more relevant tobut underlying physicochemical relationships are seldom overall onshore exploration/development objectives. This isexplored. If the relationships between different parameters achieved by maximising data quality (thereby reducing wellare understood, 1) expensive measurements can be inferred expenditure) while driving down the costs of seismic acquisitionfrom more cost-effective measurements and 2) workflows and delivering new critical information more quickly throughcan be developed that enable fast and objective selection of reduced project duration. samples for further, more time-consuming sample analysis. Ultimately, linking geophysical, geochemical and mineralogical parameters could also give rise to a new generation of higher-38: Integrated modelling of seismic velocities andlevel geoscience products reconciling different sources of impact on prospect evaluation information.Dr Jarrod Dunne 1 and Dr James Parsons1 AuScopes National Virtual Core Library (NVCL) infrastructure programme provides opportunities to explore the feasibility 1 QIntegral Pty Ltd of extracting geoscience parameters from multiple types of When a good quality seismic image is formed it is oftendrill core data and understanding their interrelations. Here we assumed that the associated velocities can be used directly fordiscuss the findings of a set of case studies from a wide range of time-to-depth conversion; for pore-pressure prediction andgeological environments that are based on NVCL drill core data perhaps even as a driver for seismic amplitude interpretation.sets available via AuScopes Discovery Portal. The case studies However, such applications require seismic velocities to behighlight multiple challenges and opportunities with regards properly integrated with velocities derived from well-data usingto extracting geoscience parameters from drill core data, such relevant geological insights to increase the utility of this type ofas 1) the requirement for understanding the limitations and geophysical data. Forward modelling can help to manage thepotential of the respective drill core analytical technologies, different scales involved and to force consistency between the2) the underutilised potential for extracting geochemical different sources of velocity data. exchange vectors from hyperspectral data, 3) lack of spatial co-registration of different drill core analytical measurements, Seismic velocities, irrespective of the method used to4) significant issues related to different sampling volumes and obtain them, should be compared to and where possibleintervals of the respective drill core analytical techniques, and 5) calibrated to well-data. Well-based velocities include editedthe potential and limitations of PLS-modelling based prediction VSP data; time-depth tables derived over intervals with aof geochemical and petrophysical data from hyperspectral quality synthetic/seismic tie; and rock physics depth trendsdata. Many of the issues described in the case studies are faced derived from sonic and other wireline logs. Geological insightby geologists daily. The NVCL infrastructure and database can be obtained from inspection of velocity trends and byprovides plentiful opportunities for developing new methods making use of well markers; stratigraphic mapping; and basinto solve the challenges related to drill core data interpretation modelling insights. Integration software can help manageand make real progress towards extracting improved and novel such data by converting between common velocity typesgeoscience parameters.AUGUST 2021 PREVIEW 68'