During the development phase the gas company builds the infrastructure necessary for a fully producing gas field.
This includes connecting existing appraisal wells, drilling any additional production wells, building a production facility, and building flowlines and pipelines to transport the gas to market.
Sometimes the gas company can take advantage of existing infrastructure. For example, the Parmelia Gas Pipeline was built in 1971, and all gas produced from Waitsia – Stage 1 until August 2020 has travelled to Perth via that pipeline.
This meant during initial Stage 1 development, Mitsui E&P Australia (MEPAU) only needed to install flowlines to connect two new wells to the existing production facility, which was already connected to the Parmelia Gas Pipeline.
As part of the Waitsia Stage 1 expansion project, MEPAU constructed a new pipeline to the nearby Dampier to Bunbury Natural Gas Pipeline. This pipeline will also be used for the new Waitsia gas production facility, which is part of the proposed Stage 2 development.
Recent appraisal well examples include Waitsia-02, Waitsia-03, and Waitsia-04.