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DTSTART;TZID=Australia/Adelaide:20250904T173000
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DTSTAMP:20260605T201010
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SUMMARY:Field Geology Club: Ralph Tate Memorial Lecture - Rings around the earth?
DESCRIPTION:We invite you to the Field Geology Club-Hosted Event \n \n  \nPlease note that this event has been organized externally – please reach out to the Field Geology Club for more information \ncontact@fieldgeologyclubsa.org.au or via their website  http://fieldgeologyclubsa.org.au. \nDate: 4th September 2025
URL:https://pesa.com.au/events/field-geology-club-ralph-tate-memorial-lecture-rings-around-the-earth/
LOCATION:South Australia
CATEGORIES:SA / NT,Technical Talk
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Australia/Adelaide:20250928T080000
DTEND;TZID=Australia/Adelaide:20250929T170000
DTSTAMP:20260605T201010
CREATED:20250511T082736Z
LAST-MODIFIED:20250925T051116Z
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SUMMARY:PESA SA : Meandering Murray Field Trip & Fluvial Stratigraphy Workshop
DESCRIPTION:PESA SA : Meandering Murray Field Trip & Fluvial Stratigraphy Workshop\nMagnificent Meandering Murray field trip: a modern-day fluvial system analogue\nSep. 28th and 29th 2025\nBrian Willis (ex Chevron ) & Andrew McKerron (Beach Energy)\n  \nJoin PESA SA/NT for an Exclusive Distinguished Lecturer Event Featuring Brian Willis \nPESA SA/NT is proud to host Brian Willis\, renowned fluvial sedimentologist and stratigrapher with decades of experience at Chevron and BP\, as part of our Distinguished Lecturer Tour. This PESA Distinguished Lecture is made possible with the generous support of Santos Ltd. \n  \nThis exciting two-day workshop offers a unique blend of field and classroom learning: \n  \n\nDay 1: Field Excursion – Sunday\, 28 September Explore the stunning landscapes of the Murray River on a guided geological field trip led by Brian Willis and Andrew McKerron\n\n          Ticket Price: Free to attend | Logistics (Self organized) meeting point will be advised closer to the date \n  \n\nDay 2: Fluvial Reservoir Heterogeneity Characterization Workshop – Monday\, 29 September \n\n         Ticket Price: $250 per participant | Location: Ayers House \nWhether you’re a student\, professional\, or enthusiast\, this is a rare opportunity to learn directly from one of the industry’s leading experts. \nLimited spots available – register now! \n  \nWorkshop Details:\nFluvial Systems – From River to Reservoir\nTraditional characterization of fluvial reservoirs focuses on relating vertical facies patterns observed in core samples to a static aerial view of an analogue river. Such comparisons fall short of generating precise predictions of the distribution of reservoir heterogeneities that can impact subsurface fluid flow and reservoir development behavior. Heterogeneity patterns within fluvial deposits are emergent structures (i.e.\, in systems analysis\, “emergent structures” are patterns that arise from the collective actions of many individual parts and behaviors and have properties that the parts themselves do not have). In fluvial deposits\, these patterns are formed by shifts in deposition and erosion during river floods\, dynamic changes in grain sorting along a river channel during lateral migration and cutoff within a channel belt\, and the stacking of channel belts as the floodplain aggrades. This course aims to build on traditional fluvial facies models to develop a more dynamic understanding of how a hierarchy of depositional processes defines heterogeneity patterns within fluvial reservoirs. \n• Discuss terminology and concepts to define the hierarchy of processes and deposits that control reservoir-heterogeneity 3D patterns and scaling. \n• Examine process-based\, numerical\, river depositional models to better understand the emergence of heterogeneities within evolving channel belts. \n• Catalogue 3D facies patterns developed within a range of river systems as a template for defining reservoir heterogeneity. \nLectures will introduce the hierarchical organization of fluvial deposits and discuss models for the development of heterogeneities within fluvial channel belts. The focus is on considering how dynamic changes preserve 3D facies patterns and understanding how these facies patterns vary between a wide range of fluvial systems. Well log interpretation and correlation exercises will demonstrate subsurface applications. The workshop is structured to challenge experienced practitioners to rethink standard practices\, while remaining general enough to benefit geologists with little experience in fluvial systems\, as well as reservoir modelers and engineers\, with a broad overview of potential subsurface variation patterns. \n  \nWorkshop Timing: \n9:30 am-5:00 pm \n  \nBrian Willis will be giving an evening talk at 5:30 pm. The talk is free for workshop attendees\, but registration is required. Please register at: \nhttps://pesa.com.au/events/pesa-sa-nt-evening-technical-talk-three-dimensional-architecture-of-wave-dominated-delta-deposits/ \n  \nPlease Note: \nDay 2: Fluvial Reservoir Heterogeneity Characterization Workshop – Monday\, 29 September-  \nComplimentary Registration for Students – 9 Seats Available \nPlaces will be allocated on a first-come\, first-served basis. Early registration is encouraged due to limited availability. \n  \nPlease note that ticket sales will close on Friday September 26th at 5:00 PM. \n  \n  \n  \n  \n  \n 
URL:https://pesa.com.au/events/pesa-sa-field-meandering-murray-field-trip/
LOCATION:Ayers House – Ballroom\, 288 North Terrace\, Adelaide\, South Australia\, 5000
CATEGORIES:Excursion,SA / NT,Technical Talk
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DTSTART;TZID=Australia/Adelaide:20250929T173000
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SUMMARY:PESA SA/NT Evening Technical Talk: Three-Dimensional Architecture of Wave-Dominated Delta Deposits
DESCRIPTION:PESA SA : Evening Technical Talk\nThree-Dimensional Architecture of Wave-Dominated Delta Deposits\nBrian Willis1\, Tao Sun2 and Bruce Ainsworth3\n  \n1. Presenter\, Willis Geoscience\, Consultant\, Longmont\, CO\, USA; 2. Chevron Technology Center\, Research Fellow\, Houston\, TX\, USA; 3. Adjunct Professor\, University of Adelaide\, Australia. \nSep. 29th 2025\n  \nJoin PESA SA/NT for an Exclusive Distinguished Lecturer Event Featuring Brian Willis \nPESA SA/NT is proud to host Brian Willis\, renowned fluvial sedimentologist and stratigrapher with decades of experience at Chevron and BP\, as part of our Distinguished Lecturer Tour. This PESA Distinguished Lecture is made possible with the generous support of Santos Ltd. \nOverview:\nNew numerical wave-influenced delta depositional models are challenging long-held rational for interpreting sea level variations recorded by wave-dominated shallow-marine successions. Shallow-marine\, wave-dominated deposits (parasequences) are generally inferred to exhibit a decrease in wave energy and grain size with increasing water depth and to occur in facies belts that are laterally continuous for long distances along strike. Bedding geometry and vertical facies successions within these parasequences are interpreted in relation to a prograding equilibrium shoreface profile (cf. Bruun rule) and a gradual upward-coarsening facies progression (cf. Walther’s law). Sea-level fall is commonly inferred to generate a sharp-based shoreface succession\, characterized by an abrupt vertical transition from heterolithic lower shoreface to sandy upper shoreface deposits across a marine erosion surface. A truncated vertical shoreface succession\, capped by a marine erosion surface\, is inferred to record significant wave ravinement during sea level rise and transgression. \nThree-dimensional\, process-physics-based\, coupled hydrodynamic-morphodynamic wave-influenced delta models suggest that wave-dominated deltas will develop a sandy shoreface inner clinoform dipping from the subaerial delta plain to a relatively flat wave-scoured subaqueous delta top\, which is laterally separated from a muddier delta front outer clinoform that dips from the subaqueous delta top edge to the shelf floor. As these systems prograde\, deposits of these dual-clinoforms will become vertically stacked and will be separated by a regressive surface of marine erosion formed on the subaqueous delta top. Grain-size contrasts between these vertically stacked clinoform deposits reflect differences in sediment-transport directions and sorting under river- and wave-driven littoral currents along the coast\, and cannot be uniquely related to sea-level changes. Gradual vertical facies successions develop where waves are less effective at reworking river-supplied sediment alongshore. In contrast\, sharp-based shoreface deposits record more effective wave separation of sands onto the shoreface clinoform as muds are preferentially transported offshore onto the subaqueous delta clinoform. \nThe continuity of a regressive surface of marine erosion over many tens to hundreds of kilometres across mid-shelf regions of some stratigraphic sequences reflects a gradual lateral shift in the position of littoral current erosion on a subaqueous delta top. Timelines cross such vertical lithic discontinuities throughout the extent of a prograding deposit\, and the regressive surface of marine erosion thus has little chronostratigraphic significance. The model results are used to suggest: 1) Characteristic strongly asymmetric wave-dominated parasequences suggest common river avulsion at the start of transgression\, 2) Observed down-dip transitions from “gradual-based” to “sharp-based” shoreface deposits might record reduced sediment supply to the coast relative to rates of longshore drift as the system expands toward its auto-retreat limit\, rather than transitions from normal to forced regression\, and 3) Regional “top-truncated” shoreface successions might record progradation of dual-clinoform shorelines with wide deviation in net direction of regional sediment supply and shallow-water wave transport\, rather than significant regional transgressive ravinement. The results of these models suggest caution in inferring sea-level changes from the character of vertical facies changes observed in individual well logs and isolated outcrop exposures. The models suggest new facies relationships that require testing in modern systems\, outcrops\, and subsurface examples. \n  \n  \nTimings for the event: \n5:30 to 6:00 – pre-talk drinks and canapes\n6:00 to 7:00 – evening talk and Q&A\n7:00 to 7:30 – post-talk drinks in the bar \nPESA SA/NT will provide a selection of canapes. Beer\, wine and soft drinks are available and can be purchased from the bar.  \nTicket prices: Students Free\, Members $30\, Non-Members $40\, Fluvial Stratigraphy Workshop attendees Free \nPlease note that ticket sales will close on Thursday September 25th at 5:00 PM. \n  \n 
URL:https://pesa.com.au/events/pesa-sa-nt-evening-technical-talk-three-dimensional-architecture-of-wave-dominated-delta-deposits/
LOCATION:Ayers House – Ballroom\, 288 North Terrace\, Adelaide\, South Australia\, 5000
CATEGORIES:Evening Event,SA / NT,Technical Talk
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