Add. DEA 21 Aug '19 (completion): South Natuna Sea block B Extn / sector IV, P&A gas in mid-Aug '19, tested ab. 4 MMcf/d biogenic gas, COSL Boss JU. Medco (op), partner Prime Natuna.
Tuna 1 (Medco 75% op, Prime Natuna Energy 25%) in South Natuna Block B PSC Extension  in the unexplored Area VI of the PSC., P&A as a gas disc.  was likely targeting Pliocene sst of the Muda Fm. According to sources, well testing indicated biogenic gas with a flow rate of 4 MMcfg/d. The operator will conduct further study by running a series of lab analysis. 