The POD approval was required ahead of the drilling programme at the Duyung PSC, as detailed below. In March 2019 Empyrean announced that the Ministry of Energy and Minerals in Indonesia had approved the Plan of Development (‘POD’) for the Mako Gas Field, securing tenure until 2037. Plan of Development Approval for Mako Gas Field The gas was of high-quality being close to 100% methane. This zone flowed gas at a stabilised rate of 10.9 million cubic feet per day through a 2 inch choke. The Mako South-1 well encountered excellent reservoir quality rock with high permeability sands in the multi Darcy range with 23 feet of gas bearing reservoir. Mako Gas Field – Contingent Resources Certified by Gaffney, Cline & Associates Category The main asset in the permit is the Mako shallow gas discovery that has an independently verified 2C and 3C gas resource of between 430-650 Bcf recoverable gas, that was completed before drilling the Mako South-1 well. The Duyung PSC covers an offshore permit of approximately 1,100km 2 in the prolific West Natuna Basin. Subject to final government approvals, this shareholding will be reduced to 8.5% following the agreement for Coro Energy plc (Coro) to acquire a 15% interest in the Duyung PSC from WNEL, completed on a pro rata basis from the existing owners, as announced in February 2019. Figure 1: Mako Gas Field, Duyung PSC, Indonesia

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