Tech Talk (public)

Vp/Vs ratio conventional vs Web-AVO inversion

eFWI Using WEB-AVO at Delft Inversion

07/08/2025 Posted by Janny

By John Coffin

This year we have seen plenty of publicity and interest in elastic full waveform inversion, or eFWI and the potential benefits and advantages it can provide. At Delft Inversion we have been using eFWI for over 12 years focussing on quantitative interpretation and seismic reservoir characterisation. This article explains how and why we do this.

The eFWI technology developed at Delft Inversion is called WEB-AVO which stands for Wave Equation Based AVO inversion. So, what does this mean? We solve the integral representation of the wave equation.

Surface interaction changes in minerals for underground hydrogen Storage: Effects of CO2 cushion gas

07/01/2025 Posted by Helen

by Hamid Esfandyari et al

This article was originally published in Renewable Energy 237 (2024) https://doi.org/10.1016/j.renene.2024.121726

Hydrogen (H2) offers a promising solution for the energy transition but storing it on a large scale at the surface poses significant technical and environmental challenges. Underground formations provide a practical alternative for large-scale H2 storage, yet understanding H2 behavior under various subsurface conditions is crucial for optimizing storage capacity and efficiency, which are influenced by rock properties such as wettability.

Onlaps2 GEOLOGICAL MODELS

07/10/2024 Posted by Dale

Rob Kirk, a 35-year career geologist, has researched "Onlaps" and lectured in seismic stratigraphy for the past decade. He shares some of his discoveries here.

Geological models are used to help with our geo-predictions up and down dip. We usually only have a few one-dimensional control points (wells) and a seismic grid to predict reservoirs, seals and source in our acreage. Seismic is often used only structurally, and if stratigraphy is contemplated, it is often via a few simplistic amplitude extractions.

West Coast Gas Outlook 2024 – “Calm Before the Storm”

06/10/2024 Posted by Dale

Rick Wilkinson, editor of new report released by independent energy consultancy EnergyQuest, West Coast Gas Outlook 2024 – Calm before the storm?, shows that WA’s domestic gas market is likely to see significant supply shortfalls from 2029 onwards.

The West Coast Gas Outlook 2024 shows the WA Government didn’t need to make major changes to its Domestic Gas Policy to ensure sufficient domestic gas supply over the next four years, but we are in the calm before the storm and changes to the Policy are on the cards from 2029.

2023 Exploration and Appraisal Year in Review

08/07/2024 Posted by Dale

Author: Adam CraigA*

A RISC Advisory Pty Ltd, Perth, Western Australia

* Correspondence to. Email: adam.craig@riscadvisory.com

Petroleum exploration expenditure in 2023 increased modestly over that of 2022. But remains well below expenditure highs of a decade ago, which was dominated by offshore activity. Exploration expenditure, and activity, is now dominant in onshore state jurisdictions. This has been the case since 2019 and will continue with no Federal offshore petroleum exploration acreage release rounds or exploration permit awards in 2023.

Record turn out for WA’s evening talk

11/10/2021 Posted by Helen

88 people attended the WA October evening talk on the prospectivity of the Perth Basin. This talk was given by Simon Molyneux at the Pan Pacific Hotel on Adelaide Terrace.

New research evaluates impact of COVID-19 travel bans

31/08/2021 Posted by Dale

Australian scientists have modelled a way to determine how many cases of COVID-19 could be travelling on any international flight, based on data from the first six months of the pandemic, which could help Australian authorities make decisions about incoming international travel.

PESA WA November Evening Talk

12/11/2019 Posted by Dale

Andrew Pitchford, GM Subsurface and Phil Woods, Senior Geophysicist from Western Gas presented their latest findings of the Sasanof Prospect in block WA-519-P, to a sell out crowd at The George in the CBD. The Mentorc Gas discovery by HESS Australia (now Western Gas) opened up the Barrow Delta Topset stratigraphic play to more exploration in the Northern Carnarvon Basin. Mentorc, up to 30% porosity and 12 Darcy permeability, is fill to spill and Sasanof may be where all the spilling gas is going to.

The current p50 estimations after recent inversion studies from DUG, have Sasanof at 24Tcf with a high PoS.

PESA WA, August Technical Lunch

21/08/2019 Posted by Alison McLeod

Chris Fielding, a current editor of Earth Science Reviews, was the guest speaker at the PESA WA Technical Lunch for August. The presentation showcased the critical importance of high quality field work in understanding depositional processes and environments of coastal to shallow marine sandstone bodies in the Cenomanian/Turonian succession of Utah and Wyoming. The talk included details on the mapping and interpretation of Frontier deltas across a 70km by 5km section in the Vernal area of northern Utah and left the audience keen to get out and about and look at some outcrops.