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Subekti, Henk
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Computer Science & IT Economics, Econometrics & Finance Electrical & Electronics Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Mechanical Engineering

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Journal : Journal Mechanical Engineering

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EVALUASI STIMULASI PENGASAMAN (MATRIX ACIDIZING) RESERVOIR PADA SUMUR FFS DI LAPANGAN PT PERTAMINA EP CEPU FIELD ZONA 11 Salhuteru, Ferinda F; Subekti, Henk; Pelasula, Berthy
Journal Mechanical Engineering Vol. 3 No. 1 (2025): APRIL
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v3i1.3304

Abstract

As time goes by, FFS well production has decreased. This then became the background for implementing matrix-type acidification stimulation measures in the relevant fields. The acid used in FFS wells is 15% HCl and 6% HF. Significantly, this acidification process has 3 stages that need to be applied, namely, preflush, mainflush, and postflush. After this stimulation, it is estimated that there will be an increase of 26.5% with an oil price of 50 USD per bbl. After evaluation, it seems clear that there has been an increase in the production rate considering that the two compounds have reacted on a scale as seen in the increase in Q price in the FFS tang well, from 147 BOPD to 200 BOPD. From an economic perspective, we can also see efficiency in the use of equipment because it minimizes many aspects that need to be changed, in other words the production rate increases only with basic capital for certain chemicals. From the evaluation carried out, economic indicators can also be seen which make this research much more economical compared to previous research, where the FFS Well has a gross profit (Gross Revenue) of 8316000 USD. Meanwhile, the net profit obtained reached 3992000 USD. The NPV value with a discount of 11.87% is 477.58 USD, with an IRR of 33,79693377% and a POT of approximately 4.48 years. Keywords: Production rate, FFS well, scale, matrix, acidizing.
ANALISA KINERJA ELECTRICAL SUBMERSIBLE PUMP (ESP) UNTUK OPTIMASI PRODUKSI SUMUR RPD PADA LAPANGAN RPT ZONA 11 JAWA TIMUR Tuasamu, Raypaldri; Subekti, Henk; Azmain Noor Hatuwe
Journal Mechanical Engineering Vol. 3 No. 3 (2025): DESEMBER
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v3i3.3776

Abstract

In the oil industry, Indonesian oil wells that initially could flow fluids naturally (natural flow) experience declining reservoir pressure over time, necessitating artificial lift methods. The RPD well in the RPT Field Zone 11 East Java uses an Electrical Submersible Pump (ESP) as an artificial lift method. This research aims to analyze ESP performance, optimize production, and assess the economic feasibility of its use. Analysis was conducted using the Inflow Performance Relationship (IPR) method with Vogel's equation to understand well production capability. The analysis results show that the maximum production rate (Qmax) of the RPD well is 1108 bpd, with a pump volumetric efficiency of 63%. Field testing produced 698 bpd at 94% water cut. For optimization, a comparison was made between ESP pump type DN1300 with 165 stages and ESP pump type TA1500 with 175 stages, resulting in an increase in volumetric efficiency from 63% to 68% and production increase from 698 bpd to 785 bpd. Economic analysis indicates that the reactivation of the RPD well using ESP is financially viable, with a Net Present Value (NPV) of $771,744, Internal Rate of Return (IRR) of 78.98%, and Benefit-Cost (B/C) ratio of 26.64 before optimization. After optimization with the TA1500 pump type, there was an economic improvement with NPV $812,450, IRR 84.15%, B/C ratio 30.21, and Pay Out Time (POT) reduced from 1.24 years to 1.08 years. Sensitivity analysis proves that this project remains economically viable under various scenarios of oil price changes, operational costs, and discount rates Keywords: Natural flow, Artificial lift, Electricial Submersible pump, Efficiency, Production optimization, Economic analysis.
Co-Authors Aisyah Putri, Nabela Ardi Kurniawan, Hendra Azmain Noor Hatuwe Dwi Candra, Arya Hakiki, Ferdy Pelasula, Berthy Salhuteru, Ferinda F Tuasamu, Raypaldri