5 October 2020

Mosman Oil and Gas Limited

 ("Mosman" or the "Company")

Updated Stanley-4 Flow Rates

Mosman Oil and Gas Limited (AIM: MSMN) the oil exploration, development, and production company, announces an update on production at the Stanley-4 well in Texas, in which Mosman has a working interest of c16.5%.

As of 2 October 2020 the operator of Stanley-4 advised that since completion, on 22 September, the well has produced 1,661 bbls of oil. The average daily rate was 200 bopd for the four days to 2 October 2020.  From the initial production 1,051 bbls of oil were sold in September. The oil had been stored in temporary tanks and Mosman can confirm the permanent production tanks were installed in the past week.

Now Stanley-4 is on production, it will be included in the 6 monthly production report and production will not be separately reported, unless there is a material change.

Competent Person's Statement

The information contained in this announcement has been reviewed and approved by Andy Carroll, Technical Director for Mosman, who has over 35 years of relevant experience in the oil industry. Mr. Carroll is a member of the Society of Petroleum Engineers.

Market Abuse Regulation (MAR) Disclosure

Certain information contained in this announcement would have been deemed inside information for the purposes of Article 7 of Regulation (EU) No 596/2014 until the release of this announcement.

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