PERENCANAAN KAPASITAS RIG PADA PEMBORAN EKSPLORASI TIPE BIG HOLE SUMUR “SWR-001” LAPANGAN PANAS BUMI “NDM”

SUPRIANA, SUPRIANA (2023) PERENCANAAN KAPASITAS RIG PADA PEMBORAN EKSPLORASI TIPE BIG HOLE SUMUR “SWR-001” LAPANGAN PANAS BUMI “NDM”. Other thesis, UPN "Veteran" Yogyajarta.

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Abstract

RINGKASAN
Lapangan panas bumi NDM letak lokasinya berada di Kabupaten
Tanggamus, Provimsi Lampung. Pada area yang berdekatan dengan lapangan panas
bumi NDM sebelumnya telah dilakukan pemboran sumur eksplorasi SRA-001,
SRA-002 dengan kedalaman 1160 m dan 570 m. Pada area lapangan panas bumi
NDM akan dilakukan perencanaan kapasitas rig untuk pemboran eksplorasi
disumur SWR-001 dengan tipe “big hole” pada kedalaman akhir 2500 m untuk
mencapai target reservoar panas bumi yang memiliki suhu 275˚C. dimana jenis
reservoar pada sumur SWR-001 berupa batu andesit.
Metodologi dalam pemilihan kapasitas rig pemboran sumur SWR-001
lapangan panas bumi NDM meliputi pengumpulan data pemboran berupa data
profil sumur, data casing, dan data densitas lumpur. Komponen utama yang
berpengaruh pada perhitungan besarnya horse power yang dibutuhkan rig yaitu
sistem angkat, sistem putar dan sistem sirkulasi. Pada sistem angkat besarnya horse
power yang dibutuhkan dipengaruhi oleh kecepatan pengangkatan travelling block,
beban hook dan faktor efisiensi dari drilling line. Pada sistem putar besarnya horse
power dipegaruhi oleh besarnya rpm, besarnya torsi maksimum dan kedalaman
target. Pada sistem sirkulasi besarnya horse power yang dibutuhkan dipengaruhi
oleh kecepatan pemompaan dan pressure loss sepanjang sistem sirkulasi. Total
horse power didapatkan dari menjumlahkan horse power dari sistem angkat, sistem
putar, sistem sirkulasi dan safety factor. Besarnya biaya sewa rig didapatkan dari
biaya sewa rig per hari dengan rencana lamanya waktu pemboran.
Hasil dari perhitungan pada beban total menara didapatkan nilai sebesar
331.549 lb. Hasil perhitungan pada sistem angkat didapatkan nilai horse power
drawwork sebesar 452 hp dan horse power prime mover sebesar 502 hp. Pada
sistem putar didapatkan nilai rpm kritis sebesar 242, yield strenght sebesar 82731
psi, torsi sebesar 38.100 lb/ft, drawwork sebesar 290 hp dan horse power prime
mover sebesar 322 hp. Pada sistem sirkulasi didapatkan nilai horse power sebesar
453 hp. Safety factor rig sebesar 100 Hp. Berdasarkan hasil analisis beban,
didapatkan nilai kapasitas rig sebesar 1.377 hp. Namun rig yang tersedia dipasar
1500 hp. Waktu pemboran selama 28 hari dan biaya sewa rig per hari US$ 20.00
sehingga biaya sewa rig sebesar US$ 841,250.00. Biaya mobilisasi dan
demobilisasi sebesar US$ 630,938.00. Biaya rig up dan rig down sebesar US$
240,000.00. Total biaya yang harus dikeluarkan sebesar US$ 1,712,188.00.
Kata kunci: Hoisting System, Rotating System, Circulating System, Kapasitas rig,
Biaya sewa rig.
ABSTRAK
The NDM geothermal field is located in Tanggamus Regency, Lampung
Province. In the area adjacent to the NDM geothermal field, exploration wells SRA-
001 and SRA-002 were previously drilled with depths of 1160 m and 570 m In the
NDM geothermal field area, capacity planning for the rig for exploratory drilling
in the SWR-001 well with the “big hole” type at a final depth of 2500 m will be
carried out to reach the target geothermal reservoir which has a temperature of
275˚C. where the type of reservoir in the SWR-001 well is andesite.
The methodology for selecting the capacity of the SWR-001 geothermal field
drill rig SWR-001 includes the collection of drilling data in the form of well profile
data, casing data, and mud density data. The main components that affect the
calculation of the amount of horse power needed by the rig are the lift system, rotary
system and circulation system. In the lifting system, the amount of horse power
required is influenced by the lifting speed of the traveling block, the hook load and
the efficiency factor of the drilling line. In the rotary system, the amount of horse
power is affected by the amount of rpm, the amount of maximum torque and the
depth of the target. In a circulating system, the amount of horse power required is
influenced by the pumping speed and pressure loss along the circulation system.
Total horse power is obtained from adding up the horse power of the lifting system,
rotary system, circulation system and safety factor. The amount of the rig rental fee
is obtained from the rig rental fee per day with the planned drilling time.
The results of the calculation on the total tower load obtained a value of
331.595 lb. The results of calculations on the lifting system obtained a horse power
drawwork value of 452 hp and a prime mover horse power of 502 hp. The rotary
system obtained a critical rpm value of 242, yield strength of 82731 psi, torque of
38.100 lb/ft, drawwork of 290 hp and horse power prime mover of 322 hp. In the
circulation system, the horse power value is 453 hp. Rig safety factor of 100 Hp.
Based on the results of the load analysis, the rig capacity value is 1.377 hp. But the
rigs available in the market are 1500 hp. The drilling time is 28 days and the rig
rental fee is US$ 20.00 per day, so the rig rental fee is US$ 841,250.00. The
mobilization and demobilization costs were US$ 630,938.00. Rig up and rig down
costs US$ 240,000.00. The total cost that must be incurred is US $ 1,712,188.00.
Key words: Hoisting System, Rotating System, Circulating System, Rig capacity,
Rig cost.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Hoisting System, Rotating System, Circulating System, Rig capacity, Rig cost.
Subjects:	T Technology > T Technology (General)
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Eko Yuli
Date Deposited:	07 Aug 2023 02:33
Last Modified:	07 Aug 2023 02:33
URI:	http://eprints.upnyk.ac.id/id/eprint/36812

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