Mitsui E&P Australia Holdings Pty Ltd

First gas found in the Perth Basin at Yardarino (near Dongara) by West Australian Petroleum Pty Ltd (WAPET), leading to the discovery of the Dongara Wodgina reservoir.

WA’s first gas pipeline is built by APA Group (Australia), the 416km Parmelia Gas Pipeline from Dongara to Pinjarra, and the first gas was produced for sale from the Dongara Wodginga reservoir.

Dongara Gas Field which supplied Perth’s gas from 1971.

Wandoo Petroleum Formed, Mitsui’s first direct interest into exploration and production (E&P).

Mitsui E&P Australia formed to hold Enfield/Vincent offshore interests.

Mitsui exploration and production interests across Australia and New Zealand were consolidated under MEPAU.

Mitsui exploration and production interests across Australia and New Zealand were consolidated under MEPAU

Kipper interest acquired by Mitsui E&P Australia.

Mitsui acquired ASX-listed AWE Limited, and the AWE business was fully integrated into MEPAU – this included AWE Perth Pty Ltd, now ‘MEPAU Perth Basin Pty Ltd’, which is the operator of the Waitsia Gas Project in Western Australia’s Mid West. Since the 1970s, AWE Perth Pty Ltd has been operating multiple oil and gas facilities in the Mid West region, including the now decommissioned Dongara Gas Field which supplied Perth’s gas from 1971.

Waitsia Project Stage 2 Final Investment Decision (FID) and commencement of Project construction.

MEPAU launched its Carbon Solutions business and acquired Outback Carbon, a carbon farming company, to develop carbon farming (ACCU) projects.

MEPAU commenced a joint feasibility study on Western Australian Carbon Capture and Storage (CCS) and low carbon ammonia opportunities with Wesfarmers Chemicals, Energy & Fertilisers Limited (WesCEF) and Japan Organization for Metals and Energy Security.

First property acquisition for carbon purpose; and first seedlings planted for a carbon project.

MEPAU is a supporter of Indigenous engagement and Indigenous reconciliation in Western Australia, taking up membership with Reconciliation WA in 2022.

Successful CO2 Injection Assessment for the Cygnus (CCS) Hub in the Mid West, Western Australia.

Waitsia Stage 2: Construction of Waitsia Gas Plant was completed in July 2025.

Commencement of first gas out from Waitsia Gas Plant in December 2025.

Achievement of nameplate export capacity of 250 terajoules per day at the Waitsia Gas Plant in April 2026.

Great Cocky Count Workshop

Milestone Achieved: Nameplate Capacity Reached at Waitsia Gas Plant

Mid West Major Projects Conference 2026

$2,000 Scholarship sponsored at the 2026 SPE WA Awards

76th Chapman Valley Agricultural Show

SHINE Supporters and Partners Lunch

Helping Geraldton women build confidence on the road

Supporting Coorow District Tennis Club