Stanley-4 Drilling Update

14 September 2020

Mosman Oil and Gas Limited

 ("Mosman" or the "Company")

Stanley-4 Drilling Update

Mosman Oil and Gas Limited (AIM: MSMN) the oil exploration, development and production company, advises that the Stanley--4 well in East Texas has completed drilling after reaching the target depth of circa 5,000 feet.

Drilling was completed successfully. Several zones of interest were identified while drilling, in line with expectations. The well has now been logged to evaluate the target zones. Logs indicate several potential pay zones in the Yegua formation between 4600-4900 feet.

The well will now be completed and tested. Flow rates will be advised when data is available.

This makes a total of four wells drilled by the joint venture at the Stanley project, with positive results.

Mosman holds a 16.5% working interest in Stanley-4.  

John W Barr, Chairman, said: "We are pleased to deliver this next step, further demonstrating the team's ability to advance its business plan. Attention now turns to flow testing Stanley-4, as well as well as the drilling of Falcon-1." 

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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