In an operational update from the SASB gas field well intervention programme, Trillion Energy International has noted the improved flow rates from the South Akcakoca-2 well.
“The fantastic response of South Akcakoca-2 once the water was lift off the perforations indicates that the reservoirs will produce the gas they contain once the water loading is removed. The wells are going to be perforated and monitored during clean up to evaluate the reservoirs response. The next phase of this project is to install the smaller production tubing (2 3/8”) to allow the wells to produce for a few years before water loading occurs again," Arthur Halleran, CEO of Trillion, said.
The South Akcakoca-2 well was perforated over the intervals 2319.5-2323.5 (4.0 m), 2339.6-2341.3 (1.7m) and 2411.1-2412.8 (1.7m) for a total of 6.4 m (all measured depth MD). Well hole pressure (WHP) was 86 psi before perforation, the WHP increased to 1046 psi.
The well flowed continuously from early 9 July, and by 10 July afternoon the flow rate was 0.70 MMcf/d with a WHP of 140 psi. By 15 July, the flow rate was 2.88 MMcf/d with a WHP of 318 psi.
Monitoring of the South Akcakoca-2 well will be continued until it hits a stable point.
The production characteristics indicated that perforating the new zones blew the water out of the well, while also implying that the reservoirs that were water-blocked are cleaning up and producing gas.
Guluc-2 well was perforated over the intervals 3512-3514.5 (2.5 m), 3749.5-3751.3 (1.8 m), 3770.7-3772.4 (1.7m) and 3781.6-3783.3 (1.7m) for a total of 7.7 m (all MD). WHP was 650 psi and increased to 1243 psi before settling to 1098 psi.
Guluc-2 will be flowed to clean the water and perforation debris out and be capable of gas production, however, it will then be shut in while South Akcakoca-2 well gas production stabilises.
The increase in the WHP during perforation indicates gas flowed into the borehole from the new perforated zones.
Updated flow rates have yet to be established for this well due to the ongoing testing of SA-2.
The perforation operation is currently continuing ongoing on West Akcakoca-1 well after which it will perforate the remaining pay in Akcakoca-3.
