Legislation has been developed to allow gas producers to supply broader quality gas in Western Australia. The Gas Supply (Gas Quality Specifications) Act 2009 encourages the development of gas fields that did not meet the previous specifications.
Natural gas is made up of a mixture of gases. The percentage of each gas type in natural gas affects its overall quality. Natural gas quality varies between gas reservoirs.
Gas specifications are the outer limits of each component of gas allowed in Western Australia’s pipelines. Broadening the gas specification means changing the outer limit of some of the components, while still meeting safety standards
The Dampier to Bunbury Natural Gas Pipeline was declared a PIA pipeline on 14 June 2012. The Goldfields Gas Pipeline was confirmed as a PIA pipeline on 2 December 2015.
Gas producers seeking to deliver broad specification gas into the Dampier to Bunbury Natural Gas Pipeline or the Goldfields Gas Pipeline will need to enter into a Pipeline Impact Agreement with the pipeline operator.
BHP Billiton (Macedon) and the Dampier to Bunbury Natural Gas Pipeline entered into a Pipeline Impact Agreement in 2011. The agreement facilitates the transport of broad specification gas from the Macedon gas field on the Dampier to Bunbury Natural Gas Pipeline.
The new legislation requires that PIA pipeline operators provide to the Public Utilities Office the average higher heating value of the gas stream in the pipeline for each day. Information is provided for the Dampier to Bunbury Natural Gas Pipeline [PDF] and for the Goldfields Gas Pipeline [PDF].
Current information is available on the Gas Bulletin Board (WA) website [external] (the following steps will take you there: Accept, Reports tab, Gas Specification)