September 2022 – Technical Talk

September 2022 – Technical Talk

Speaker: Dr. Seogi Kang, Postdoc Researcher, Stanford University.

Title: Time-lapse inversion of airborne electromagnetic data for monitoring saltwater intrusion

Date: Wed, September 28, 2022

Time: 5:00pm to 6:00pm PST

Locations: This talk will be held both in-person and virtually via Zoom.

In-person:
Room 111, 409 Granville St. Vancouver BC, V6C 1T2

Virtual:
Join Zoom Meeting
https://us06web.zoom.us/j/87444007896
Meeting ID: 874 4400 7896
Passcode: 732254

Bio:
Dr. Kang completed his PhD in Geophysics at University of British Columbia, Canada, in 2018. His thesis work focused on computational electromagnetics and its application to mining problems. Currently, he is a Postdoctoral Researcher in the Geophysics Department at Stanford. His current research focus is on maximizing the value of electromagnetic imaging for groundwater management and science. He is a co-creator of an open-source geophysical software, SimPEG.

Abstract:
In coastal areas, half of the population lives and 75% of the cities are located. Groundwater is a major source of freshwater in these coastal. Increased water demand with the population growth causes more pumping of groundwater. Climate change causes sea level rise. Net effect of these is increased saltwater intrusion threatening the freshwater security in coastal regions. Due to the close connection between salinity and electrical resistivity (or conductivity), electromagnetic (EM) geophysics can play a critical role by imaging saltwater intrusion. A specific form of the EM geophysics used in this study is the airborne EM (AEM) method, which can rapidly map out subsurface resistivity of a large coastal region. While there are many AEM experiments for imaging subsurface hydrogeology, conducting time-lapse AEM experiments is not common due to the relatively expensive cost the survey as well as the repeatability issues. Further, there is yet no implementation of time-lapse inversion for AEM data, which simultaneously invert multiple AEM data sets with a constraint along a time dimension. Working with the two AEM data sets acquired in 2017 and 2019 at the Northern Salinas Valley of California, USA, in this study, we developed a novel time-lapse inversion approach using an Lp-norm for the spatial and temporal constraints. Three different types of inversion were conducted: 1) Separate inversions with L2-norm constraints; 2) Time-lapse inversion with L2-norm constraints; 3) Time-lapse inversion with L0-norm constraints. From inversion results, we found that the time constraint played an important role for minimizing the inversion artifacts in the conductivity difference between resistivity models at 2017 and 2019. We also found that the use of L0-norm for both spatial and time constraints provided the most confident estimate of the conductivity difference due to the sparse nature of the implemented L0-norms. The final conductivity difference from the time-lapse inversion with L0-norm was compared with salinity contours from in-situ measurements.

Webinar:
A recording of this webinar will be made available after the talk on our Youtube channel.

BCGS 2022 Workshop: Drones in Geoscience

The BC Geophysical Society is excited to announce our upcoming 2022 Workshop “Drones in Geoscience”.

This workshop offers a start-of-the-art examination of where the use of drones is now and where it is headed in the future in applied geoscience, and especially applied geophysics. The first day will consist of lectures and presentations from experts in drone fabrication and from service providers discussing how drones are used. The second day will be at a local outdoor facility where attendees will witness advanced and innovative drones in flight.

Our keynote speaker will be Ron Bell, Senior geoDRONEologist and Geophysicist. His talk will be titled “The Elegance of Drone Geoscience”.

During Thursday’s technical session, companies who will be demonstrating on Friday will be display booths set up. This will be a great opportunity to see the drones and discuss the technology up close.

We are currently looking for volunteers to assist with setup/cleanup on Friday. In exchange we are offering free attendance to the workshop.

Abstract Booklet:  Speaker Abstract Booklet PDF

Schedule – Thursday:  Schedule Thursday PDF

Schedule – Friday: Schedule Friday PDF

Dates:Thursday May 12, 2022 – Lectures & Presentations
Friday May 13, 2022 – Live Field Demonstrations
Times:Thursday: 8:15am to 5:00pm
Friday: 9:30am to 4:30pm
Registration:Cost:
– Two Day Non-Member Price $250
– Two Day BCGS Member Price $230
– Two Day Student Price $20
– One Day (Thur only or Friday only) Price $180
– One Day Virtual (Thur only) Price $75
Registration payment link is below
Locations:Thursday:
SFU Harbour Centre, Fletcher Challenge Theatre (Room 1900)
515 West Hastings Street, Vancouver, BC, V6B 5K3

Moose Down Under
830 W Pender St, Vancouver, BC V6C 1J8

Friday:
Burnaby Lake Sports Complex – East: Fields 3-6
3520 Sperling Ave, Burnaby, BC V5B 4Z6
**Access directions below

Workshop Event Abstract: Drone Workshop Abstract

Registration:

Please register in advance of the symposium. Your registration is guaranteed once payment has been received. The attendee name must be entered for registration to be complete. Confirmed speakers and demonstrators do not need to register. If you need to register multiple attendees at once, please email info@bcgsonline.org. Payment will be processed by Paypal and can be paid using a credit card, debit card, or a Paypal account.

Current paid 2022 BCGS members are able to register at the BCGS member rate for the two-day event. Other attendees must use the standard industry rate.

We have added a virtual registration option to participate in the Thursday lectures via Zoom.


Thank you to everyone who attended, both in-person and virtually. Your support is appreciated.

Sponsors:

Speakers:

Ron Bell, Drone Geoscience, LLC
The Elegance of Drone Geoscience

Jan Franke, Groundradar Inc.
Challenges and Opportunities of Drone GPR

Alan Chapman, NAV Canada
Drones and the Airspace: Current Operations and Future Needs

Ian Wills, Coastal Drone
How I learned to love the RPAS; or Flying Drones Legally and Safely in Canada

Steve Donovan, Beyond Visual Light of Sight Innovation Centre (BVLOS InC)
VLOS to BVLOS Protocols, Challenges and Solutions

Nicolas Martin-Burtart, Radiation Solutions Inc.
Radiometric data collected with an UAV: Pre-flight and post-processing

Travis Ferbey, Quaternary Geologist, British Columbia Geological Survey
Can remotely piloted aircraft-borne radiometrics and magnetics detect dispersal trains in subglacial tills?

Zane White, Candrone
Photogrammetry and LiDAR – The Facts and Myths About Modelling Our World in 3D via UAV

Michael Burns, Pioneer Exploration
Lessons Learned in an Emerging Drone-Based Geophysics Industry

Rees Pillizzi, Measur
Large Area UAV LiDAR Mapping: Trinity F90+ with Qube 240 LiDAR

Laura Quigley, Seequent
UAV Geophysics Workflow for your Magnetometer Data

Eric Sazuk, BCIT
Drone-based Gas Sniffing

Geoff Pettifer, Terra Entheos Geoscience
NSG Inter-Society Committee on UAV Geophysics Guidelines and Standards – Drone Magnetic Guidelines

Demonstrators:

We have an exciting group of demonstrators who will be showing the latest and greatest in drone technology. Each of these companies will also have a display booth on Thursday.

  • Drone Geoscience, LLC
  • Discovery International Geophysics
  • Measur
  • Pioneer Exploration
  • TurnTech
  • Candrone
  • Radiation Solutions Inc.
  • Terraplus
  • Stratus Aeronautics / Coywolf (Thurs display booth only)

Access:

Access to the Burnaby Lakes Sports Complex East, Fields 3 & 4, is easy by both vehicle and transit. Access to the parking lot is from Sperling Ave via Joe Sakic Way (Sprott St is currently closed due to construction).

BCGS/KEGS Roundup Breakfast 2022

BCGS/KEGS Roundup Breakfast – February 1, 2022

Speaker: Lindsey Heagy, PhD. Assistant Professor, Department of Earth, Ocean and Atmospheric Sciences, UBC

Title: Geophysics in a changing climate

Date: Tuesday, February 1, 2022

Time: 7:30am – 9:00am PST

Location: Pearl Room, Fairmont Pacific Rim Hotel, 1038 Canada Place, Vancouver, BC, V6C 0B9

Abstract:

Geophysics in a changing climate
Lindsey Heagy, PhD. Assistant Professor, Department of Earth, Ocean and Atmospheric Sciences, UBC

It is clear that the geosciences have an important role to play in working to understand and mitigate the societal impacts of the climate crisis. Locating critical minerals, monitoring geologic storage of CO2, managing groundwater, and characterizing changes to permafrost are all applications where geophysical data can provide insights. These applications raise interesting scientific questions about how to combine petrophysical, geologic, geochemical, and additional geophysical data sets to improve our ability to produce useful models of the subsurface. The next significant advancements will undoubtedly involve methodological improvements in inversions and machine learning, but importantly will require a more interdisciplinary approach, where the methods we design can be used to test and revise hypotheses specific to a given geologic context. The growth and adoption of open-source software and data standards is a positive step. Within the SimPEG community, we have seen many examples of how working in a modular, interoperable framework enables ideas to rapidly be prototyped and extended. Working in an open ecosystem allows us to more readily connect with methods in other fields, including geologic modelling and machine learning.

Although geophysics has an important role to play in mitigating climate change and its impacts, we are at risk of continuing to be a “field in decline.” Geosciences as a whole have a severe diversity problem, and with the strong association of geophysics with hydrocarbons deterring many students, we are missing out on the talents and ideas of many. In this talk, I look forward to opening up what I hope will be continuing discussions about growing our community and broadening the scientific and societal contributions we can make. 

About the Speaker:

Lindsey Heagy is an Assistant Professor in the Department of Earth, Ocean and Atmospheric Sciences at UBC. She completed her BSc in geophysics at the University of Alberta in 2012 and her PhD at UBC in 2018. Following her PhD, she was a Postdoctoral researcher in the Statistics Department at UC Berkeley. Her research aims to advance methods in geophysical inversions and machine learning for carbon sequestration, mineral exploration, groundwater, and environmental studies. She is a co-founder of the SimPEG and GeoSci.xyz projects which develop open source software and educational resources for geophysics. In 2019, she was awarded the Gerald W. Hohmann Outstanding Young Scientist for advances in simulation and inversion of electromagnetic data and promotion of an open source culture for collaborative, inclusive and reproducible research.

Recording:

A recording of this webinar is available on our YouTube channel.

2021 Annual General Meeting

Our 2021 annual general meeting (AGM) will be held:

at 4:00pm on Tuesday, December 21, 2021
(via Zoom Webinar)

The main order of business will be to elect the Directors of the BCGS and review the past year’s activity. Our bylaws allow for between 4 and 7 Directors. The current directors are all standing for re-election. One new individual has been nominated and will be standing for election.

The BCGS directors standing for re-election are:

ChairBrendan HoweTeck Resources Ltd.
Vice-ChairGraham ParkinsonKlohn Crippen Berger
TreasurerRoss PolutnikSJ Geophysics Ltd.
SecretaryJen HanlonDias Geophysical
Scholarship CoordinatorDennis WoodsDiscovery International Geophysics Ltd.
Student LiaisonDominique FournierMira Geoscience Ltd.
Membership Coordinatoropen

The following new individuals are standing for election:

Membership CoordinatorNihal YavuzTeck Resources Ltd.

Voting will occur virtually within the Zoom webinar.

We would like to remind you there are two classes of voting members in the BCGS:

  1. General Members: An annual fee of $20. Will be returned as a discount should they choose to enroll in our annual symposium; and
  2. Student Members: Free membership upon demonstration of enrollment in a post-secondary program at an accredited educational institution.

In order to participate in the vote, we ask that you pay your 2022 member dues online via Paypal below. These member dues will provide membership in the BCGS through 2022. Eligible students, as defined above, are entitled to vote. Please email the executive at info@bcgsonline.org to be added to the official member list.

Membership Options:

 

The AGM is open to all members and non-members.

As no BCGS symposium was offered in 2021, the normally offered $20 discount offsetting the 2021 membership dues paid, will be allocated to the BCGS Scholarship program.

November 2021 – Technical Webinar

BCGS Technical Talk – October 2021

Speaker: David Wares, Sales Director (Western Canada), GHGSat

Title: Monitoring GHG Emissions

Date: Thursday, November 18, 2021

Time: 4:00pm – 5:00pm PST

Location: Webinar via Zoom (distributed via our newsletter)

Bio:

David Wares graduated from Queen’s University with a degree in Chemical Engineering. He has been in the energy industry for 16 years with time at Shell (in their Green House Gas Department), Weatherford, Pason and most recently joined GHGSat to help utilize emission sensing technology and data technology for industries seeking to decarbonize their activities and the planet we all share.

Description:

The geophysical profession will be increasingly involved in climate solutions (earth science for CO2 sequestration, research into natural and anthropogenic GHG sources and sinks, GHG monitoring including remote sensing, airborne and satellite etc.). David’s talk will be particularly interesting to students examining career paths as GHGSat represents a Canadian company in a rapidly growing sector that will employ the geophysical skill set. Geophysicists from large multi sector resource companies are being asked to provide inhouse expertise and opinions on GHG monitoring options as more requirements begin to be implemented by regulators.

GHGSat’s new Pulse online map shows the effects of the earth’s seasonal and latitudinal variations in methane concentration (all rolled up with local methane emissions). GHGSat also provides airborne and satellite methane monitoring and analytical services that allow assessment of fugitive emissions from individual sites.

Abstract:

Monitoring methane emissions from oil and gas facilities requires the combination of several technologies to gain a full understanding of the challenge at a manageable cost. The integration of frequent and affordable high resolution satellite measurements to find the larger leaks with less frequent aircraft surveys, forms the basis of a tiered monitoring system showing great promise to optimize Leak Detection and Repair (LDAR) activities. In this presentation, we will present examples of methane emissions measurements at oil and gas facilities acquired with both GHGSat’s satellites, and the airborne variant with the imaging spectrometer design.   While the combination of different technologies is not uncommon, this system is the first in the world utilizing the same sensor concept at two different altitudes. The performance parameters of each system will be highlighted and supported with recent examples. In addition, the advantages of the hybrid system will be discussed, including the opportunity for cross-validation of measurements. Also, we will discuss other methane detecting satellites currently in orbit or scheduled for launch. Finally, the potential of such a system to be used for regulatory reporting purposes will be discussed and contrasted to the standard of performing Optical Gas Imaging (OGI) camera campaigns three times a year used in jurisdictions, such as in Canada and the US.

Webinar:

A recording of this webinar will be made available after the talk on our Youtube channel.