PESA - Energy Geoscience

PESA & ASEG QLD: Lunch Presentation, 24th February – Dr Moritz Ziegler
2023-02-24 12:15 - 14:00 (Australia/Brisbane) | Hilton Brisbane City, 190 Elizabeth Street, Brisbane QLD, Brisbane, 4000, Australia
This month PESA and ASEG welcomes Dr Moritz Ziegler to present a technical luncheon entitled “The Good, the Bad and the Uncertainties – A model of the stress state”.
The Technical Lunch will be held at the Brisbane Hilton Hotel, in room the Victoria Room.
For detailed directions, see explanation below.

Presentation:
The Good, the Bad and the Uncertainties – A model of the stress state

Venue:
Hilton Hotel Brisbane, 190 Elizabeth Street, Brisbane QLD 4000
Victoria Room
(Detailed directions below)

Date & Time:
Friday, 24th February 12:15 PM

Presentation Abstract:
The Good, the Bad and the Uncertainties – A model of the stress state
A profound knowledge of the undisturbed stress state is the basis for an understanding and prediction of effects that occur during subsurface operations. These issues, from wellbore stability to the potential for injection or production induced seismicity are relevant for safety. Safe operation is particularly important with the public as a stakeholder. An increase in subsurface usage in urban areas (for geothermal district heating) is expected in Europe due to the need to become independent from energy imports and meet the climate goals.
The limited availability of stress (magnitude) data records usually doesn’t allow a significant prediction of the stress state in an area of interest. Therefore, geomechanical-numerical modelling is applied. Available stress data records are used to calibrate a model of the subsurface that predicts the stress state at the area of interest. However, the models are subject to large uncertainties due to limited knowledge on rock properties, 3D geology, and stress magnitude data. To allow for a significant interpretation of the model results the uncertainties are quantified. Therefore, a range of different possible stress scenarios that are supported by data are modelled.
To reduce the uncertainties, additional indirect observations of the stress state are used. They are data from boreholes such as Formation Integrity Tests or the observation of Borehole Breakouts, recorded seismicity, or injection-induced stress rotations. The different stress scenarios are compared for their agreement with the indirect data. The more indirect data is in agreement with a certain scenario, the higher is the scenarios probability. Eventually, a Bayesian approach is applied to assign probabilities to individual stress scenarios. This leads to an increase in significance of the model which adds value to the interpretation.

Tickets for the Technical Luncheon can be purchased below:
Early bird pricing will remain available up until Thursday, 16 February 11:30 PM after which, standard pricing will come into effect.
Final numbers to venue required by Tuesday, 21 February 12:00 PM – To avoid disappointment please register before that date and time.

Early Bird Ticket Price
Standard Ticket Price

PESA Members – $55
Non-Members – $77
Student / Retired Members – $33
PESA Members – $77
Non-Members – $99
Student / Retired Members – $33

The venue location can be accessed by two means:
1) Entry from Queen Street Mall
Enter the lifts located just to the left of Mick O’Malley’s Irish Pub, and take the lifts to Level 6. Once you exit the lifts, the Victoria Room is immediately to the left.
2) Entry from Elizabeth Street
Enter the foyer located on 190 Elizabeth Street, and take the lifts to Level 6 (Main Foyer). The Victoria Room is located in the back of the main foyer towards the right as you walk past Vintaged Restaurant.

Keep track of upcoming PESA QLD Events:

Click here to view PESA QLD Events Calendar on the web

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PESA SA/NT February Technical Luncheon- Making Good Decisions in an Uncertain World - Can we Do It?
2023-02-23 12:00 - 14:30 (Australia/Adelaide) | Ayers House – Ballroom, 288 North Terrace, Adelaide, South Australia, 5000
Making Good Decisions in an Uncertain World – Can we Do It?
Presented by: Dr Steve Mackie (Geosim Consulting)
Abstract
Business under-performance in the upstream oil and gas industry, and the failure of many decisions to return anticipated results would say the answer to the question is “no!” But by comparing and contrasting a theoretical decision-making model (how people should make decisions) with a “real world” decision-making model (how people in the oil and gas industry do make decisions) to develop a prescriptive list of how to improve the quality of decisions in practice, specifically as it applies in the upstream oil and gas industry, indicates the answer is …… “possibly yes!”

Event Details:
Thursday, February 23rd, 2023
Luncheon: 12 pm for a 12:30 pm start
Place: Ayer’s House, 288 North Tce, Adelaide
Includes a 2-course lunch and drinks
Tickets:
Student Members – $25
Members – $60
Non-members – $75
SPE and ASEG Members- $60
Bookings close 1 pm Monday, February 20th.
Any late bookings will incur an additional $20 fee. Strictly no walk-ins.

PESA WA Workshop: Salt Tectonics in Australian Sedimentary Basins
2023-02-23 09:00 - 17:00 (Australia/Perth) | Curtin University – Bentley Campus (Building 500 – Department of Chemistry), Department of Chemistry, Kent St, Bentley WA 6102, Perth, WA, 6102, Australia
PESA WA invites you to a 1 day workshop on Friday 23rd February

“Salt Tectonics in Australian Sedimentary Basins”
with instructor Chris Elders
Interest in salt deposits in sedimentary basins has increased dramatically in recent years because of its potential role as a seal for natural hydrogen and helium accumulations, and as a site for the storage hydrogen and other gases. Although salt is present in a number of Australian basins, there are relatively few studies that document the evolution of salt structures in the context of wider research that has developed rapidly over the past 20 years.
In this workshop we will examine current thinking on the evolution of salt structures and apply these concepts to examples of salt structures from the Petrel, Vulcan, Canning, Officer and Amadeus basins. Participants are encouraged to bring examples of their own favourite salt structures for part of the discussion.

Location: Curtin University, 137 St Georges Terrace, Brookfield Place
(first floor of the old Perth Technical School/Perth Technical College building)

Ticket Prices:
Member: $350
Student Member: $100
Non-Member: $500
Tickets close 5pm Monday 20th of February

On Friday 24 February (1.00 pm to 4.00 pm) a special session of the Sedimentology and Stratigraphy Interest Group at the Perth Core Library, 37 Harris St, Carlisle, led by Vincent Crombez, Fionna McNee and Chris Elders, will examine cores from mineral and petroleum wells in the Canning and Office basins that have penetrated thick salt sequences. This will provide us with the opportunity to investigate the composition and deformational fabrics in mobile and non-mobile salt, as well as the underlying and overlying stratigraphic successions. As is tradition, the SSIG workshop will be followed by drinks at 4.00 pm at the Balmoral Hotel, Victoria Park.
Participants can choose to attend both of the events, or just one of them. However, for insurance purposes the SSIG core workshop is only open to members. If you are not currently a member you will need to sign up before booking. Members who attend the full day workshop on the 23rd of February, can attend the SSIG core workshop on the 24th of February for free. Register for the SSIG core workshop here.

2023 PESA WEBINAR SERIES: Controls on Shelf-Margin Architecture and Sediment Partitioning in the Hammerhead Shelf-Margin
2023-02-21 11:00 - 12:00 (Australia/Perth)
Kindly supported by Rock Flow dynamics

This live webinar will take place at:
11am – Perth
12.30pm – Darwin
1pm – Brisbane
1:30pm – Adelaide
2pm – Canberra, Hobart, Melbourne, Sydney
Use the calendar link on this page to add this event in to your own calendar at the correct local time for your location.
Tickets are free for members (please log in to see this) and $10 for non members.
Please buy your tickets and immediately follow the link in the ticket e-mail (not the calendar invite or this webpage, which is just generic and not event specific) to set up your registration with the webinar software well in advance of the time of the talk. Once registered with the webinar software you will receive a reminder e-mail 1 hour beforehand.
Controls on Shelf-Margin Architecture and Sediment Partitioning in the Hammerhead Shelf-Margin
Presented by John Shepherd (Centre for Energy Geoscience, University of Western Australia)
Abstract

Understanding the stratigraphic architecture of shelf-margin clinoforms is key to determining both how sediments are transported to deep-water settings and how the interplay of tectonics (subsidence/uplift) and eustasy, with variation in sediment supply, impacts deep-water sand delivery. Within this study clinothems are used to establish quantitative and statistical relationships between the shelf-margin architecture, paleoshoreline processes, and deep-water system types (i.e., quantitative 3D seismic stratigraphy). The Hammerhead shelf-margin prograded during the Late Cretaceous within the Great Australian Bight Basin, along the southern margin of Australia, following break-up with Antarctica. This understudied interval offers a unique opportunity to investigate the controls on the evolution of a shelf margin during the early stages of the post-rift phase.
All available data (i.e., 2D seismic data, 3D seismic data and well data) from the Ceduna Sub-basin has been integrated to investigate the controls on shelf-margin architecture and factors affecting sediment delivery to deep-water. Quantitative analyses involved the measurement of clinoform geometries (e.g., slope length, slope height, shelf-edge progradation and aggradation etc.), which were used to calculate several parameters (e.g., shelf-edge trajectory angle, progradation rate, aggradation rate). The extent of various deep-water systems (e.g. long run-out turbidites) was also measured. It is concluded that lateral variations in sediment supply were the main driver of shelf-margin variability at 3rd order scale.
The Hammerhead shelf-margin provides unique insights in the early stages of drifting between Australia and Antarctica, which has implications for better understanding of early post break-up dynamics. Quantitative results from the Hammerhead shelf-margin can also be used to improve predictability of offshore sediment deposits in other basins globally.

PESA WA: Technical lunch talk - 16 February
2023-02-16 12:00 - 14:00 (Australia/Perth) | Parmelia HIlton, 14 Mill Street, Perth, WA, 6000, Australia
Hosted with thanks to our Platinum sponsor SLB

Gold Sponsors Katalyst Data Management, Applied Geoscience, Delft Inversion and DUG

and Silver Sponsor Qeye

PESA WA invites you to our technical luncheon on Thursday 16th February

“An integrated interpretation of the petrophysical and petrographic data acquired at Olympic 1, Canning Basin, Western Australia”
Presented by Julie Cass, GSWA
The Ordovician interval cored in Olympic 1 is one of the best-documented cored intervals of the Nambeet Formation in the Canning Basin. Consequently, the Geological Survey of Western Australia (GSWA) entered into a collaborative core analysis agreement with the EP473 Joint Venture to acquire a suite of core plugs for stratigraphic and petroleum system testing and CO2 geosequestration evaluation.
This presentation offers an integrated interpretation of petrophysical and petrographic data acquired at Olympic 1, assessing reservoir quality in the Ordovician and the impact of acoustic properties on seismic prospecting at the Meda unconformity. Volume of clay, porosity and saturation have been calculated from wireline logs to assist in the petrophysical evaluation and for comparison with x-ray diffraction, routine and special core analysis measurements.
The Nambeet Formation has been subdivided into a lower Fly Flat Member and an upper Samphire Marsh Member. The Fly Flat Member contains good storage capacity but very poor flow capacity. Quartz overgrowths and carbonate precipitation fill intergranular porosity, isolating much of the macroporosity, in which flow is then further impeded by calcite-rich laminae present throughout the sandstone. Together these characteristics lead to the Fly Flat Member being deemed low permeability and therefore unsuitable for geosequestration. Special core analysis has confirmed the Samphire Marsh Member has excellent seal capacity as pore throats are consistently measured to be microporous in all lithologies. Micropores in detrital clays are the principal pore system, with sufficient microporosity in mudstones to expect connected porosity. Gas shows correlate positively with clay volume, demonstrating this connectivity. Mechanical properties of limestone and mudstone lithologies should be investigated if proposing the Samphire Marsh Member as a seal for geosequestration, due to their contrasting properties.
The Willara Formation is capped by a distinct dolomitized zone that has enhanced porosity and permeability. The occurrence of an oil show in this interval also indicates the validity of the upper Willara Formation as a potential hydrocarbon target elsewhere in the Canning Basin.
Seismic interpretation of future Goldwyer Formation prospects would benefit from a regional understanding of the Meda unconformity and the imperceptible seismic contrast that occurs between the Grant Group claystone and Goldwyer Formation mudstone. It is likely this contributed to the shallow prognosis of the Meda unconformity in this well, and it explains the unexpected erosion of the Goldwyer Formation. Without the Goldwyer Formation, the primary target for this exploration well lacked a seal.

Ticket Prices:
Member (Early Bird): $69.00
Concession Member [Retired, Graduate or Hardship] (Early Bird): $59.00
Student Member (Early Bird): $39.00
Non-Member: $99.00
Member (Non-Early Bird): $79.00
Early bird pricing ends Thursday (1 week prior) at 5pm (AWST). All ticket sales close at 5pm Tuesday (2 days prior).

Refund Policy: Refunds are only applicable if notified in writing to WA-secretary@pesa.com.au prior to the close of ticket sales. Refunds will be issued to all participants in the case that government regulations prevent the event taking place.

PESA NSW 56th Annual OPS Golf Day
2023-02-09 | Killara Golf Club, 556 Pacific Hwy, Killara, NSW, 2071
Dear PESA Members,
You are invited to attend the 56th Annual PESA NSW Golf Day to be held on Thursday 9th February 2023 (previously postponed from 6th October 2022). To join us, please click “download flyer” below for entry forms and submit to Cameron Fink (cfink@bridgeport.net.au).
Photos of the event are available to download here:
https://pesa-tech-library.s3-accelerate.amazonaws.com/2023/02/FEB2023-PESA-NSW-Golf-Day-Photos-Part1.zip
https://pesa-tech-library.s3-accelerate.amazonaws.com/2023/02/FEB2023-PESA-NSW-Golf-Day-Photos-Part2.zip

PESA WEBINAR SERIES RETURN: We Shouldn’t Be Here: A Cosmological and Geological Look at How Lucky We Are
2023-02-07 11:00 - 12:00 (Australia/Perth)
Kindly supported by Rock Flow dynamics

This live webinar will take place at:
11am – Perth
12.30pm – Darwin
1pm – Brisbane
1:30pm – Adelaide
2pm – Canberra, Hobart, Melbourne, Sydney
Use the calendar link on this page to add this event in to your own calendar at the correct local time for your location.
Tickets are free for members (please log in to see this) and $10 for non members.
Please buy your tickets and immediately follow the link in the ticket e-mail (not the calendar invite or this webpage, which is just generic and not event specific) to set up your registration with the webinar software well in advance of the time of the talk. Once registered with the webinar software you will receive a reminder e-mail 1 hour beforehand.
We Shouldn’t Be Here: A Cosmological and Geological Look at How Lucky We Are
Presented by Rob Kirk (Rob Kirk Consultants)
Abstract

This talk is about how lucky homo sapiens is to be here. There are many unlikely scenarios that had to occur for this to happen and, if replayed, it is unlikely that we would be here. We will start at the Big Bang and consider things ET, along with Plate Tectonics and the many close shaves we had to extinction. Weird water will be examined, along with how did life start and the part that Milankovitch cycles played in our development. There will be one seismic line.
