Mari Energies' origins go back to 1957, when Esso Eastern Inc. discovered Mari gas field in
Daharki,
Ghotki District,
Sindh, Pakistan, with an
original gas in place (GIIP) estimate of 2.38 TCF. Over the years, with the phased development of the field and subsequent reservoir evaluations, the GIIP of the Field was enhanced to 10.751 TCF, thus making Mari one of the largest gas fields in Pakistan in terms of balance reserves. In May 1983, the
Fauji Foundation acquired a majority stake in Mari Gas during the military regime of
Zia-ul-Haq. Other shareholders included
Oil & Gas Development Company and the
Government of Pakistan which they had acquired from Esso Eastern Inc. In December 1984, it was reorganized and incorporated as Mari Gas Company Limited, and it acquired the assets, liabilities, and operational control of the Mari gas field. Mari Gas primarily operated as a production company until 1997, when it began the phased development of the Habib Rahi Reservoir to supply gas for new
fertilizer plants. The company also simultaneously pursued appraisal activities within its Mari D&P Lease by drilling step out wells to determine the boundaries of the Habib Rahi Reservoir. A year later, in 2002, Mari Gas, Total, and their contracting partners —
Petronas,
OMV, and the
Oil & Gas Development Company — signed Pakistan's first-ever Production Sharing Agreements (PSAs) with the Government of Pakistan. In November 2012, Mari Gas Company was rebranded as Mari Petroleum Company Limited. Initially operating under a cost-plus tariff structure, its pricing mechanism was revised in 2014–2015 to align with international
crude oil prices. In January 2025, the company underwent another transformation, adopting the name Mari Energies Limited. ==Operated blocks==