Fahmi, Musthofa (2017) Optimasi Produksi Melalui Pemilihan Sumur Online dengan Metode Binary Programming pada Fasilitas Jaringan Sumur Minyak dan Gas. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Produksi minyak Indonesia dari tahun ke tahun mengalami penurunan. Menurut SKK MIGAS penurunan tersebut disebabkan karena sekitar 90 persen total produksi minyak dihasilkan dari lapangan berusia lebih dari 30 tahun, sehingga dibutuhkan investasi yang cukup besar untuk menahan laju penurunan alaminya. Blok ONML menjadi salah satu blok utama tertua penyokong produksi minyak dan gas Indonesia dengan produksi 40000 BOPD minyak dan 167 MMSCFD gas yang beroperasi sejak tahun 1971. Brev flowstation merupakan salah satu lapangan produksi ONML yang telah beroperasi sejak tahun 1975 dengan produksi 8300 BOPD dan 24 MMSCFD, memiliki 84 sumur dengan karakteristik berbeda-beda dan menggunakan metode gas lift injection untuk me-lifting minyak produksi melalui sistem kompresi 2 train kompresor (2 unit low pressure dan 2 unit high pressure) dengan pressure dan flow tertentu.
Ketika dalam kondisi tertentu seperti adanya maintenance atau trouble serta tuntutan untuk mengefisiensikan operasi dengan mempertimbangkan biaya operasional turbin kompresor, sehingga sistem kompresi berjalan dengan menggunakan 1 atau 1,5 train kompresor saja. Perubahan tersebut akan berpengaruh pada jumlah produksi gas lift yang di inject kan ke sumur dan kemampuan hisap kompresor dari gas yang dihasilkan sumur, sehingga beberapa sumur harus dimatikan agar supply gas lift masih dapat memenuhi kebutuhan minimum sumur yang tersisa.
Dalam penelitian ini dilakukan optimasi sistem produksi sumur minyak dan gas pada lapangan Brev flowstation dengan menggunakan metode binary programming dan didapatkan kombinasi 70 sumur online pada sistem kompresor 1 train dengan gain profit sebesar USD 18.748,78 per hari dan kombinasi 78 sumur online pada sistem kompresor 1,5 train dengan gain profit sebesar USD 7.869,06 per hari. Berdasarkan perbandingan biaya operasional turbin kompresor dan profit optimal, sistem operasi turbin kompresor 2 train tetap lebih menguntungkan dengan selisih profit sebesar USD 47.099,63 per hari dibandingkan sistem 1 train dan USD 7.101,21 per hari dibandingkan sistem 1,5 train.
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Indonesia's oil production has continuously decreased from year to year. According to SKK MIGAS, it is because of 90% of total oil production generated from the field aged over 30 years, so it takes a considerable investment to withstand the rate of its natural decline. One of the oldest main blocks of Indonesia's oil and gas production is the ONML block (operating since 1971) that yield 40000 BOPD oil and 167 MMSCFD gas. Brev Flowstation, one of the ONML production fields that has been operating since 1975 with production of 8300 BOPD and 24 MMSCFD, has 84 wells with different characteristics and uses the gas lift injection method to increase oil production through 2 train compression system (2 low pressure units and 2 high pressure units) with certain pressure and flow.
Under certain circumstances, such as periodical maintenance or operational efficiency (considering the operational cost of turbine compressor), the compression system will apply 1 or 1.5 compressor train only. Consequently, the amount of gas lift production injected to the well and the suction capability of the compressor will be affected too; so that some wells must be turned off in order to meet the minimum gas lift supply requirements of the remaining wells.
This research analised oil and gas well production system optimization in Brev Flowstation using binary programming method, that resulted in combination of 70 online wells on 1 train compressor system with gained profit of USD 18,748.78 per day and 78 online wells on 1.5 train compressor system with gained profit of USD 7,869.06 per day. By comparing compressor operating cost and optimal profit, it is concluded that 2 train compressor system is the most profitable system, with profit deviation of USD 47,099.63/day compared to the 1 train system and USD 7,101.21/day compared to the 1.5 train system.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTMT 658.562 Fah o-1 |
| Uncontrolled Keywords: | oil and gas well, gas lift, gas compressor, optimasi, binary programming |
| Subjects: | H Social Sciences > HD Industries. Land use. Labor > HD28 Management. Industrial Management H Social Sciences > HD Industries. Land use. Labor > HD30.23 Decision making. Business requirements analysis. Q Science > Q Science (General) T Technology > T Technology (General) T Technology > T Technology (General) > T58.62 Decision support systems T Technology > TS Manufactures > TS167 Costs, Industrial |
| Divisions: | 61101-Magister Management Technology |
| Depositing User: | Musthofa Fahmi |
| Date Deposited: | 15 Jan 2018 07:54 |
| Last Modified: | 05 Mar 2019 03:50 |
| URI: | http://repository.its.ac.id/id/eprint/42901 |
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