The Tilapia Field has been in production since 2007 and is currently producing 38/bopd of 39-41 API light sweet crude, from wells in the R1/R2 horizon. With workover and enhanced oil recovery techniques, AAOG expects to increase production from this horizon and continue production for many years. P90 reserves in R1/R2 are estimated at 7.6 million barrels.
AAOG believes that with the application of enhanced oil recovery techniques, wells TLP101 and TLP102 can substantially increase production. The first workover involves reperforation and acidisation of the R1 and R2 reservoirs in well TLP102 which will be drilled and connected to the manifold. The second workover involves the setting of a progressive cavity pump over the R2 reservoir in well TLP101.
Within the Tilapia Field, developments in seismic techniques have recently been able to interpret the presence of hydrocarbons in the Djeno Sands, which lie below the pre-salt layer. In neighbouring fields ENI, SOCO International and Oryx are already producing or in the final stages of testing prior to production from the Djeno Sands.
The seismic material indicates that the Djeno Sands have high volumes of reserves, and the presence of hydrocarbons in the AAOG block is confirmed with conventional flow rates. This was not brought into production within Tilapia when originally tested because the necessary techniques to kick-start production did not then exist.
The Djeno Sands have been shown to have reservoirs that, in neighbouring fields, have been in production since 2013, with production of 4,750-5,000 bopd per well. These other fields have enjoyed high flow rates, which are caused by the oil layer itself being naturally pressurised by lower lying high-pressure gas deposits.