Ann: Mukuyu-2 Drilling Update, page-199

(Not sure if anyone has pointed this out yet) but I thought the same thing but digging through the old announcements from M1 that 135x reading was a bit deeper than where we are at the moment.

But as others have pointed out, today's announcement says "Total background gas is higher than those observed in Mukuyu-1 and heavier hydrocarbons (C4 and C5) have been detected, providing further evidence of an active petroleum system in the basin."

This was from the 14/11/22 announcement for M1. Note the 3171m depth, whereas M2 is only ~2500m.