Condamine River seeps
Gas seeps are a naturally occurring phenomenon around the world. The Condamine River seeps are located southwest of Chinchilla in Queensland.
Australia Pacific LNG, through Origin, continues to invest in a robust, ongoing program of research into the seeps that includes monitoring bores, seismic studies, seep flow and flux measurements, river ecology health assessments and continued use of independent research and analysis experts.
Condamine River Seeps October 2018
Condamine River seeps timeline
Dec 2011 Condamine River experiences major flooding, heavily scouring the riverbed.
Apr 2012 Condamine River seeps are identified. Historical evidence of shallow gas and natural gas seeps
in the area is well known. There is no coal seam gas development in the immediate area.
Aug 2012 Origin, as upstream operator for Australia Pacific LNG, initiates a long-term monitoring and
research program and independent technical review by international scientific experts into
Sep 2013 CSIRO develop a method to measure the flow rates at the main seep.
Nov 2013 Several monitoring bores are drilled nearby as part of ongoing studies.
Feb 2014 Independent technical review (Norwest) finds several possible factors may be contributing, including
the underlying geology, natural events such as drought and flood cycles as well as human activity
(water bores and future coal seam gas development).
Jan 2014 Increasing seep flow rates are observed. Regular measurement of flow rates begins using
methodology developed by CSIRO.
Jun 2015 Several hoods are installed underwater to capture and safely vent the gas and provide additional
real time monitoring.
Jan 2016 Flow rates at the main seep peak at almost 2,000 litres a minute.
Apr 2016 The seeps are deliberately lit with claims large scale CSG development nearby and 'fraccing' is the
cause (despite no gas development in the area and the nearest fracced gas well being over 15km
away). The actions gain widespread attention.
Jun 2016 Informed by research, local seismic studies and technical review recommendations, three
specifically designed wells and a further monitoring bore are drilled as a first step towards
intercepting and reducing the amount of gas heading towards the river.
Aug 2016 Seep flow rates begin to fall.
Dec 2016 Three intercept wells come online, providing valuable insights to the management of the seeps and
future development in the area.
Mar 2017 Seep flow rates fall significantly.
Jun 2017 Twelve gas wells drilled directly south of the river are brought into production.
Oct 2017 Seep flow rates fall sharply to 158 litres per minute, around a quarter of the first flow rate measured
back in 2013.
Dec 2017 Measurements confirm the downward trend and a reduction of over 90% compared to the peak in early
2016. Work commences on a second development package of gas wells adjacent to the river made up
of 14 production wells and eight wells specifically designed to intercept gas heading towards the seeps
through an identified natural fault and pathway.
Feb 2018 Measurements confirm a continued reduction in seep flow rates to around 100 litres per minute.
Apr 2018 Increased flow rates begin to be observed as the 12 gas wells south of the river come off line for
maintenance and upgrade work, reducing their mitigating effect.
Jul 2018 Flow rates plateau around 1,000L/minute as these wells are progressively brought back into production.
Sep 2018 Flow rates fall dramatically after the second, larger package of mitigation wells immediately adjacent
to the seeps come on-line. Gas is intercepted and directed into gathering lines as part of regional gas
Oct 2018 Seep flow rates of around 50 litres per minute are recorded, the lowest level measured to date.