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PREMIER OIL PLC

("Premier")

Zama-1 Spudded

22 May 2017

Premier is pleased to announce that the Zama-1 exploration well in Block 7 (Premier equity 25 per cent) in the shallow water Sureste Basin, offshore Mexico, was spudded at 0630 on 21 May 2017. This is the first exploration well to be drilled on acreage awarded in Mexico's first international licencing round in 2015. 

The well's principal target is the low risk Zama prospect with supportive direct hydrocarbon indicators in the Tertiary clastic reservoirs. The Zama structure is estimated to have a P90-P10 gross unrisked resource range of 100-500 mmbbls. The well is expected to take up to 90 days to drill both the Zama prospect and the secondary target, Zama Deep, at a total cost to Premier of $16 million.

The partners in Block 7 are Talos Energy (operator, 35 per cent), Sierra Oil and Gas (40 per cent) and Premier (25 per cent).

Forward Looking Statements

Certain statements in this announcement are forward looking statements. These forward looking statements can be identified by the use of forward looking terminology including the terms "believes", "expects", "estimates", "anticipates", "intends", "may", "will" or "should" or in each case, their negative, or other variations or comparable terminology. These forward looking statements reflect Premier's current expectations concerning future events. They involve various risks, uncertainties and other factors which may cause the actual results, performance or achievements of the Group, third parties or the industry to be materially different from any future results, performance or achievements expressed or implied by such forward looking statements. Such risks, uncertainties and other factors include, amongst other things, general economic and business conditions, industry trends, competition, changes in regulation, currency fluctuations, the Group's ability to recover its reserves or develop new reserves and to implement expansion plans and achieve cost reductions and efficiency measures, changes in business strategy or development and political and economic uncertainty. There can be no assurance that the results and events contemplated by these forward looking statements will in fact occur.