AWE Limited has been advised by Santos, as Operator, that a successful Drill Stem Test (DST) by APR tools with full bore and ful flu features has been conducted on the G Sand reservoir at the AAL-4XST1 appraisal well, offshore Indonesia, achieving an averaged stabilized flow rate of 828 bopd on a 64/64-in. choke over a 9-hr period. The results exceeded pre-drill expectations, and are 58% higher than the previous G-sand tests at AAL-3X (525 bopd).

The DST was successfully conducted over a 3.5 m perforated interval in the sidetrack wellbore and was assisted by an electrical submersible pump (ESP), which is standard procedure in heavy oil fields, due to the viscosity of the oil.The test was done with tester valve(STV) with locked open position and normal position,together with champ packer, slip joint, RD valve, jar and so on.

Bulk oil samples were recovered for further testing, but wellsite measurements indicate the G-sand oil to have a specific gravity of 10.7 API at 60°F, consistent with previous samples from AAL-3X. Produced gas and water were at rates too low to measure.

AWE’s preliminary analysis of the wireline log data indicates an 8-m oil column in the G-Sand and excellent quality reservoir, the best encountered in the field to date. No oil-water-contact was intersected in the well.

Operations are now underway to commence a second DST test in the main AAL field K-sand reservoir.

(From worldoil)