INTEGRATED ASSET MODELLING INJEKSI IMMISCIBLE WATER ALTERNATING GAS SEBAGAI PERENCANAAN PILOT PROJECT LAPANGAN “AJ”

ALJAWI, RANGGA MAHARDHIKA (2025) INTEGRATED ASSET MODELLING INJEKSI IMMISCIBLE WATER ALTERNATING GAS SEBAGAI PERENCANAAN PILOT PROJECT LAPANGAN “AJ”. Skripsi thesis, UPN Veteran Yogyakarta.

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Abstract

ABSTRAK
INTEGRATED ASSET MODELLING INJEKSI IMMISCIBLE
WATER ALTERNATING GAS SEBAGAI PERENCANAAN
PILOT PROJECT LAPANGAN “AJ”
Oleh
Rangga Mahardhika Aljawi
NIM: 113210017
(Program Studi Sarjana Teknik Perminyakan)
Perencanaan pengembangan Lapangan “AJ” dilakukan dengan pendekatan
Integrated Asset Modelling (IAM) untuk mengevaluasi efektivitas metode injeksi
Immiscible Water Alternating Gas (IWAG) dalam meningkatkan perolehan
minyak. Metode ini dipilih karena hasil simulasi basecase menunjukkan recovery
factor awal sebesar 11,4%, tergolong rendah sehingga diperlukan penerapan
Enhanced Oil Recovery (EOR). Dibandingkan waterflood yang hanya mencapai
recovery factor 13,6%, IWAG menawarkan efisiensi penyapuan lebih baik melalui
kombinasi keunggulan injeksi air (efisiensi makroskopik) dan gas (efisiensi
mikroskopik).
Simulasi dilakukan menggunakan tNavigator, diawali dengan penempatan sumur
optimal menggunakan Assisted History Matching berbasis Particle Swarm
Optimization. Dilakukan juga sensitivitas terhadap laju dan siklus injeksi untuk
memperoleh skenario terbaik.
Hasil menunjukkan skenario optimal IWAG pada kombinasi laju injeksi air 10.000
bbl/day dan gas 3432 Mscf/day (W2G3), menghasilkan produksi minyak 160,496
MMSTB dan recovery factor 15,87%. Skenario dengan siklus injeksi 18 bulan
menghasilkan produksi tertinggi 162,179 MMSTB, remaining reserve 849,761
MMSTB, dan recovery factor 16%. Dengan IAM, distribusi fluida injeksi dapat
dimonitor melalui streamline dan VRR yang menunjukkan efisiensi penyapuan
berjalan optimal. IWAG dengan pendekatan IAM dapat dijadikan rencana awal
pilot project untuk peningkatan perolehan minyak di Lapangan “AJ”.
Kata kunci: Enhanced Oil Recovery, Immiscible Water Alternating Gas, Integrated
Asset Modelling, Simulasi Reservoir, Water-Gas Injection.
vi
ABSTRACT
INTEGRATED ASSET MODELLING OF IMMISCIBLE WATER
ALTERNATING GAS INJECTION AS A PILOT DEVELOPMENT
PLAN FOR "AJ" FIELD
By
Rangga Mahardhika Aljawi
NIM: 113210017
(Petroleum Engineering Undergraduated Program)
The development planning of the "AJ" Field was carried out using an Integrated
Asset Modelling (IAM) approach to evaluate the effectiveness of Immiscible Water
Alternating Gas (IWAG) injection in enhancing oil recovery. This method was
selected because basecase simulation results showed an initial recovery factor of
11.4%, which is considered low, thus requiring the implementation of Enhanced
Oil Recovery (EOR). Compared to waterflooding, which only achieved a recovery
factor of 13.6%, IWAG offers better sweep efficiency by combining the advantages
of water injection (macroscopic efficiency) and gas injection (microscopic
efficiency).
The simulation was conducted using tNavigator, starting with optimal well
placement using Assisted History Matching based on the Particle Swarm
Optimization algorithm. Sensitivity analysis was also performed on injection rates
and cycle durations to determine the most effective scenario.
Results show that the optimal IWAG scenario was achieved with a water injection
rate of 10,000 bbl/day and gas injection of 3432 Mscf/day (W2G3), resulting in
total oil production of 160.496 MMSTB and a recovery factor of 15.87%. The
scenario with an 18-month injection cycle produced the highest cumulative oil
production of 162.179 MMSTB, with a remaining reserve of 849.761 MMSTB and
a recovery factor of 16%. With IAM, fluid distribution can be monitored through
streamlines and VRR, indicating optimal sweep efficiency. Therefore, IWAG with
an IAM approach can serve as an initial pilot project plan for improving oil
recovery in the "AJ" Field.
Keywords: Enhanced Oil Recovery, Immiscible Water Alternating Gas, Integrated
Asset Modelling, Reservoir Simulation, Water-Gas Injection.
vii

Item Type: Tugas Akhir (Skripsi)
Uncontrolled Keywords: Enhanced Oil Recovery, Immiscible Water Alternating Gas, Integrated Asset Modelling, Reservoir Simulation, Water-Gas Injection.
Subjek: T Technology > T Technology (General)
Divisions: Fakultas Teknologi Mineral dan Energi > (S1) Teknik Perminyakan
Depositing User: Eko Yuli
Date Deposited: 12 Nov 2025 02:37
Last Modified: 12 Nov 2025 02:37
URI: http://eprints.upnyk.ac.id/id/eprint/45405

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