PESA QLD: Evening Presentation, 25th August – Dr Grazia Gargiulo & Dr Julie Pearce
Thursday, 25 August @ 5:00 pm - 7:00 pm (Australia/Brisbane time)$15.00 – $45.00
This month, PESA QLD is happy to welcome Dr Grazia Gargiulo & Dr Julie Pearce to present an evening technical talk entitled “Quantification of Gas in Groundwater”.
The Evening Presentation will be held at the Transcontinental Hotel, on the Platform level with drinks and finger food served in the Dining Hall and Deck Area.
|Presentation:||Quantification of Gas in Groundwater|
|Venue:||Transcontinental Hotel, 482 George Street, Brisbane QLD 4000
|Date & Time:||Thursday, 25th August 2022, 5:00 pm|
Quantification of Gas in Groundwater
Baseline bore assessments suggest the use of a gas stripper or separator, or filling an inverted container in a bucket to measure gases such as methane, referring to documentation from 13+ years ago. Current standard bore monitoring however often tends to involve the simple filling of a vial container with water, with the methane extracted in the lab for measurement. However akin to opening a can of coke, dissolved gases can desorb and escape to atmosphere when pumped from depth.
Gas and water samples were collected from coal seam gas (CSG) wells, and from aquifer and alluvium water bores in the Surat Basin. We collected samples for methane concentrations with three methods in the field: vials, IsoFlasks, and the Terra Sana gas-water separator. We found that the currently used “open” vial sampling method may lose gases to atmosphere and be underestimating gas concentrations especially in gassy bores.
In addition, stable isotopes of gases and waters, and other isotopic tracers were measured to understand sources of methane. The majority of the sampled water bores had methane, CO2 and water stable isotopic signatures distinct from CSG wells, suggesting methane was produced in-situ. However, a minority of samples from gassy bores could not be clearly distinguished from CSG signatures, and methane migration could not be ruled out.
Tickets can be purchased below.
To avoid disappointment please register before that date and time.
|Standard Ticket Price|
|PESA Members – $35
Non-Members – $45
Student / Retired Members – $15
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