NARESWARI, AURA ALMA (2024) PENENTUAN CADANGAN MINYAK SISA UNTUK PERENCANAAN SUMUR INFILL PADA LAPISAN “A” LAPANGAN “AWRA” MENGGUNAKAN SIMULASI RESERVOIR. Other thesis, UPN Veteran Yogyakarta.
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Abstract
vi
RINGKASAN
PENENTUAN CADANGAN MINYAK SISA UNTUK
PERENCANAAN SUMUR INFILL PADA LAPISAN “A”
LAPANGAN “AWRA” MENGGUNAKAN SIMULASI
RESERVOIR
Oleh
Aura Alma Nareswari
NIM: 113190134
(Program Studi Sarjana Teknik Perminyakan)
Lapangan “AWRA” merupakan lapangan minyak onshore yang terletak di
Cekungan Sumatera Tengah dan terletak di kabupaten Rokan Hilir ±130 km ke arah
Utara. Reservoir terletak di Formasi Sihapas dengan batuan penyusun berupa
batupasir. Lapisan A Lapangan “AWRA”, mulai berproduksi sejak April 1972.
Hingga akhir produksi pada Juli 2019, terdapat 7 sumur aktif, 12 sumur shut in, dan
6 sumur injeksi. Original oil in place (OOIP) pada Lapangan “AWRA” sebesar 66
MMSTB. Kumulatif produksi minyak saat akhir produksi di Juli 2019 mencapai
25,51 MMSTB dan recovery factor sebesar 38,66%. Perencanaan pengembangan
Lapangan “AWRA” perlu dilakukan karena masih terdapat luasaan area
hidrokarbon di Lapisan A yang masih belum terkuras, sehingga produksi kurang
optimal. Oleh karenanya, dilakukan studi simulasi reservoir untuk menentukan
lokasi serta jumlah sumur pengembangan yang optimum.
Perencanaan pengembangan Lapangan “AWRA” menggunakan simulator.
Tahap simulasi diawali dengan persiapan dan pengolahan data, validasi model
(inisialisasi, history matching, PI matching), lalu melakukan prediksi dengan
penambahan sumur infill dengan mempertimbangkan letak dan jarak antar sumur
infill berdasarkan peta oil per unit (OPU) dan bubble map, melakukan analisa dan
menentukan jumlah sumur serta skenario optimum yang dapat diterapkan dengan
memperhatikan kenaikan recovery factor. Dalam penambahan sumur infill,
constrain yang digunakan minimum bottom hole pressure (BHP), maksimum water
cut, dan minimum surface oil rate (STO). Prediksi dilakukan dengan membuat 2
skenario. Skenario 1 berupa basecase ditambah 10 sumur infill. Skenario 2 berupa
basecase ditambah 5 sumur infill optimum yang didapatkan melalui plot kumulatif
produksi minyak dengan jumlah sumur.
Skenario optimum yang diterapkan pada Lapisan A Lapangan “AWRA”
adalah Skenario 2 dengan 5 sumur infill optimum, diperoleh nilai kumulatif
produksi minyak sebesar 28,06 MMSTB dan recovery factor sebesar 42,53%.
Peramalan performa produksi ini dilakukan mulai Juli 2019 sampai end of
production sharing contract.
Kata kunci: OPU, bubble map, infill, skenario optimum, recovery factor
vii
ABSTRACT
DETERMINATION OF RESIDUAL OIL RESERVES FOR
INFILL WELL PLANNING IN LAYER "A" OF THE "AWRA"
FIELD USING RESERVOIR SIMULATION
By
Aura Alma Nareswari
NIM: 113190134
(Petroleum Engineering Undergraduated Program)
The "AWRA" field is an onshore oil field located in the Central Sumatra
Basin and is located in Rokan Hilir district ±130 km to the north. The main
reservoir is located in the Sihapas Formation with the constituent rocks being
sandstone. Layer A of the "AWRA" Field, started production in April 1972. Until
the end of production in July 2019, there were 7 active wells, 12 shut-in wells and
6 injection wells. Original oil in place (OOIP) in the "AWRA" Field is 66 MMSTB.
Cumulative oil production at the end of production in July 2019 reached 25.51
MMSTB and the recovery factor was 38.66%. Planning for the development of the
"AWRA" Field needs to be carried out because there are still large hydrocarbon
areas in Layer A that have not been drained, so production is less than optimal.
Therefore, a reservoir simulation study was carried out to determine the optimum
location and number of development wells.
"AWRA" Field development planning using a simulator. The simulation
stage begins with data preparation and processing, model validation (initialization,
history matching, PI matching) to calculate cumulative oil production, then making
predictions by adding infill wells by considering the location and distance between
infill wells based on the oil per unit map and bubble map, carry out analysis and
determine the number of wells and the optimum scenario that can be applied by
taking into account the increase in recovery factor. In adding infill wells, the
constraints used are minimum bottom hole pressure (BHP), maximum water cut,
and minimum surface oil rate (STO). Predictions are made by creating 2 scenarios.
Scenario 1 is a base case plus 10 infill wells. Scenario 2 is a base case plus 5
optimum infill wells obtained through a cumulative plot of oil production by number
of wells.
Based on the predictions made, the optimum scenario applied to Layer A of
the "AWRA" Field is Scenario 2 with 5 optimum infill wells, resulting in a
cumulative oil production value of 28.06 MMSTB and a recovery factor of 42.53%.
This production performance forecasting is carried out from July 2019 until the end
of the production sharing contract.
Keywords: OPU, bubble map, infill, skenario optimum, recovery factor
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | OPU, bubble map, infill, skenario optimum, recovery factor |
| Subjects: | T Technology > T Technology (General) |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Eko Yuli |
| Date Deposited: | 28 May 2024 02:23 |
| Last Modified: | 28 May 2024 02:23 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/39517 |
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