Publications

In well operations, problems tend to arise and are relatively difficult to overcome specially when many occur in one well, causing the existing production to continue to decline. To anticipate this, it is necessary to optimize wells so that production can increase. One of the optimizations carried out was by reactivating the wells in the Anggana area (Figure 1), Pertamina EP's Sangasanga Field. However, the reactivation of suspended wells also carried a low success ratio due to the poor quality of the subsurface data. There were no reserves per layer for each structure and the history of the suspended wells had not been well documented and updated. For this reason, the authors attempted to evaluate the subsurface data of the reactivation work using the GGRP (Geology & Geophysics, Reservoir, and Production) data matrix rejuvenation and economic analysis in making the reactivation program and evaluation, after the work was done. After the authors conducted the rejuvenation of the Anggana and SKL structures, the production of the Sangasanga field increased gained 224 BOPD with a cumulative production increase of 75,994 STB. This method has been effectively used in the Sangasanga field and has the potential to be replicated and applied to other fields.