Publications

X and Y fields are mature fields with almost 400 wells have been drilled since 1996. Many wells have been shut-in for a long time due to producing below economical limit of 10 BOPD. Several reasons are due to depleted reservoir pressure, watered out, and low reservoir quality. Long shut-in time allows the reservoir pressure to build up and improve. On the other side, good waterflood and pressure maintenance efforts also improved the reservoir pressure and oil recovery potential. Many wells become potential for reactivation. In 2018, 5 (five) wells were reactivated after a long period of shut-in. However, the initiatives were not entirely effective due to lack of established method for candidates selection and prioritization applied. Not all wells can be monitored and reviewed thus resulting in lacking of reactivation candidates. In 2019, a more comprehensive method named “Batch Production” is introduced. It is an end-to-end selection process which consists of 5 (five) lenses: well screening, reservoir aspect review, operational aspect review, prioritization, and execution and monitoring. After implementing “Batch Production” method in 2019, we successfully reactivated 35 (thirty five) wells in 2019 – 2020 with total initial gain of 1062 BOPD, which are significantly higher than 2018 result of 5 (five) wells with 184 BOPD gain. Telisa reservoir has higher initial oil gain compared to Baturaja reservoir which were mostly driven by reservoir pressure increment. This result proves how “Batch Production” method is effective and covers all the important aspects in well reactivation. It also helps the operation team by streamlining the process of reactivating a well. No additional cost such as rig intervention or well stimulation is needed in this method, making this initiative as cost-effective yet very profitable for mature fields.