Maximizing Gas Monetization through Synergy Borderless between Pertamina EP and Pertamina Hulu Sanga Sanga

Abstrak

PEP asset 5 should meet the contractual rate supply to PLN Tj. Batu at a minimum rate of 5 mmscfd. Nevertheless, PEP struggled to sustain production due to gas facility limitations, depending mainly on natural flow from gas wells to provide via line 39 km and minimum pressure 465 psig on PLN Tj. Batu. Gas production was not optimal based on reserve evaluation, with a recovery factor of just 36% from existing conditions. The minimum wellhead pressure must be reduced to maximize recovery from gas potential. It was initially intended to build a new compressor plant, which would drastically reduce the economics of gas monetization.

On April 2021, Pertamina decided to consolidate amongst various upstream business units which operate in Kalimantan; PEP and PHSS is consolidated under Zone 9. A group team from subsurface and surface facilities representatives of PEP and PHSS analyzed various upside potentials from consolidating these two assets by pursuing synergy to accelerate produce gas potential from NKL field Pertamina EP through PHSS facilities. The study has to fulfilled several requirements from each parties PEP, PHSS and PLN.

The primary method used was a borderless operation, which aligned the PEP and PHSS production systems as a single integrated system rather than several independent systems. Prior to synergy, NKL gas would flow onstream via the NKL gas plant and the existing 39 km trunkline via the Binangat line, with a minimum pressure of 465-565 psig on PLN Tj Batu. Since most NKL gas reservoirs are depletion driven, a compression system will be required. It is intended to create a new pipeline to divert the commercialization route through Lampake Station PHSS (150-200 psi), which would lower the estimated minimum wellhead pressure to 250 psig without installing a new compression system.

In September 2022, NKL gas began providing 5 mmscfd to PLN Tj. Batu for three years. Borderless synergy provides cost-effective development solutions, resulting in faster monetization and much-increased income for the Sangasanga area.