Primorus Investments PLC announced that Horse Hill Developments Ltd, the operator of the HH-1 Kimmeridge and Portland oil discovery, located in licence PEDL137, in which Primorus holds a 3.25% beneficial interest, has informed the Company that the planned high rate Portland test sequence, designed to assess the reservoir's maximum short-term flow capacity, has been successfully completed. Stable implied daily pumped rates of 401 and 414 bopd of dry 36 API oil were recorded over two periods of 6 and 2 hours, respectively, with associated maximum half-hourly pumped rates of 441 and 470 bopd. Metered solution gas rates of around 41,000 cu ft per day were recorded through the test separator over the two maximum rate periods. As maximum initial rates were restricted by the pump's capacity of around 470 bopd, a larger capacity pump has been sourced and has been mobilised to site for possible use during the remainder of the Portland test sequence. To date, the recorded implied daily oil rates and overall produced Portland oil volumes exceed those reported from the initial short-term test programme of March 2016. The "dry" Portland oil exported from the HH-1 EWT to date is of Brent Crude quality and exceeds minimum refinery specifications, containing only around 0.2% water content. It should be noted that the above high rate results are not the long-term sustainable flow rates that will be utilised to assess the Portland's commercial viability as part of the next test phase.