Oilex said the gas readings were observed in the secondary objectives in the Basal Miocene and Oligocene OS II reservoirs, intersected at 1505m and 1545m.
These zones are being further evaluated with pressure measurements and open hole wireline logs, the company added.
The Cambay-19Z well is testing the Oligocene OS II, Eocene EP IV and Deccan fractured basement objectives.
The OS II and EP IV have proven to be oil or gas bearing in other Cambay wells while the Deccan objective is an exploration target that has not been proven in the Cambay block.
According to Oilex, the block north of the Cambay field has tested oil from the Deccan objective at rates of 1000-1500 barrels of oil per day.
As operator, Oilex holds 30% of the Cambay production-sharing contract, Oilex NL Holdings India has 15%, and Gujarat State Petroleum Corporation has 55%.
