Mathematics to improve CSG modelling

THE power of maths is helping boost CSG production in Queensland, leveraging off work completed by the University of Queensland’s Centre for Coal Seam Gas with new laboratory infrastructure at UQCCSG to investigate the complex interaction of gas and water flows within CSG wells.

Mathematics to improve CSG modelling Mathematics to improve CSG modelling Mathematics to improve CSG modelling Mathematics to improve CSG modelling Mathematics to improve CSG modelling

UQCCSG’s Dr Mahshid Firouzi

 
The aim is to improve understanding of well production and well infrastructure performance.
 
In order to extract CSG from the coal seams, groundwater needs to be removed to reduce the flowing bottom-hole pressure to allow gas to flow into the wellbore, a process that can take months, and which can vary from seam to seam, field to field, and region to region.
 
Depending on the gas and water flow rates, and flow geometry, different behaviours such as bubble flow, heterogeneous flow and falling film flow are established that determine the well deliverability. 
 
Prediction of the pressure is key to forecasting well production, tracking well capacity and optimising well prod...