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DTSTART;TZID=Australia/Perth:20250911T170000
DTEND;TZID=Australia/Perth:20250911T200000
DTSTAMP:20260605T215845
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SUMMARY:PESA-AIG-SPE-ASEG YP Networking Evening 11th September2025
DESCRIPTION:Please join the Perth Young Professional Geoscientists and Engineers from the petroleum and mining industries for a light-hearted night of in-person networking and great conversation\nEvent Details: \nDate: Thursday\, 11th September 2025 5:00-8:00pm.\nVenue: The Shoe Bar\, Yagan Square \nTicket Prices: Free: Please register below for catering purposes by Wednesday 10th 5pm \nThis event is exclusively for Young Professionals and early career professionals (people who have been working in the Oil and Gas or mining industry for less than 10 years). Please come along if you’re a student\, graduate or working professional. Meeting your industry peers is a good chance to talk about your different backgrounds\, experiences\, projects and companies with like-minded people in a very laid back and friendly setting.
URL:https://pesa.com.au/events/pesa-spe-aseg-yp-networking-evening-11th-sep-2025/
LOCATION:The Shoe\, Shop GSO7 Yagan Square\, 376 - 420 Wellington St\, Perth\, WA\, 6000\, Australia
CATEGORIES:Evening Event,Industry,WA,YPP
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DTSTART;TZID=Australia/Brisbane:20250924T180000
DTEND;TZID=Australia/Brisbane:20250924T193000
DTSTAMP:20260605T215845
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SUMMARY:PESA QLD: Evening Talk\, 24 September: Three-Dimensional Architecture of Wave-Dominated Delta Deposits - Dr Brian Willis
DESCRIPTION:  \nPESA Queensland welcomes Brian Willis to present a technical evening presentation on Three-Dimensional Architecture of Wave-Dominated Delta Deposits. The evening will be held at the Brisbane Port Office Hotel\, Blue Room. Extended abstract below. \nSpeaker travel and accommodation have been supported by Santos Ltd. \n\n\n\nPresentation:\nThree-Dimensional Architecture of Wave-Dominated Delta Deposits\n\n\nVenue:\nPort Office Hotel Brisbane\, 40 Edward St\, Brisbane City QLD 4000\n\n\n\nDate & Time:\nWednesday\, 24 September 6:00 PM\n\n\n\n\n  \nThree-Dimensional Architecture of Wave-Dominated Delta Deposits\nBrian Willis1\, Tao Sun2 and Bruce Ainsworth3\n1. Presenter\, Willis Geoscience\, Consultant\, Longmont\, CO\, USA; 2. Chevron Technology Center\, Research Fellow\, Houston\, TX\, USA; 3. Adjunct Professor\, University of Adelaide\, Australia. \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  \n\n  \nTickets for the Technical Evening Talk can be purchased below. \nStandard ticket pricing will be available until Friday\, 19 September 5:30 PM – To avoid disappointment please register before this time. \n\n\n\n\nTicket Price\n\n\n\n\n\nMembers – $35\nNon-Members – $45\nStudent / Retired Members – $25\n\n\n\n\n\n 
URL:https://pesa.com.au/events/pesa-qld-evening-talk-24-september-three-dimensional-architecture-of-wave-dominated-delta-deposits-dr-brain-willis/
LOCATION:Port Office Hotel\, 40 Edward St\, Brisbane\, Queensland\, 4000\, Australia
CATEGORIES:Evening Event,Industry,QLD,Technical Talk
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DTSTART;TZID=Australia/Adelaide:20250929T173000
DTEND;TZID=Australia/Adelaide:20250929T193000
DTSTAMP:20260605T215845
CREATED:20250908T005819Z
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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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