KINASIH, RAKA PERMANA (2024) ANALISIS PEKERJAAN REMEDIAL CEMENTING GUNA MENINGKATKAN ASPEK WELL INTEGRITY PADA SUMUR OTG-03 LAPANGAN KJG. Other thesis, UPN Veteran Yogyakarta.
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Abstract
vi
RINGKASAN
ANALISIS PEKERJAAN REMEDIAL CEMENTING GUNA
MENINGKATKAN ASPEK WELL INTEGRITY PADA SUMUR
OTG-03 LAPANGAN KJG
Oleh
Raka Permana Kinasih
NIM: 113200097
(Program Studi Sarjana Teknik Perminyakan)
Analisis log CBL-VDL penyemenan primer sumur “OTG-03” pada zona perforasi
atau interval kedalaman 1639-1641 mMD memiliki harga amplitudo berkisar 10-
39 mV, dengan harga CS rata-rata 195 psi, dan nilai bond index rata-rata 0.46. Pada
kurva VDL untuk pembacaan casing arrival dan formation arrival masih dapat
terlihat jelas bentuknya, menunjukan bonding semen yang kurang baik. Dari data
USIT log dan ALFA log juga menunjukan adanya indikasi chanelling atau aliran
belakang casing dari lapisan bawahnya menuju zona perfroasi. Dari data production
history, dilakukan analisa chan’s diagnostic plot, melalui pengeplotan nilai WOR
dan WOR derivative dengan waktu produksi, diprediksi kemungkinan terjadi
indikasi Near Wellbore Water Channeling sehingga diperlukan mitigation plan
berupa operasi squeeze cementing guna mengatasi permasalahn tersebut.
Metodologi yang digunakan pada penulisan kali ini adalah menganalisa kurva CBL
VDL baik secara kualitatif maupun kuantitatif, yang dikorelasikan dengan analisa
log USIT dan log ALFA, serta melakukan analisa problem produksi melalui chan’s
diagnostic plot. Melakukan evaluasi perhitungan operasional penyemenan squeeze,
yang meliputi perhitungan volume slurry, volume aditif, ketinggian kolom fluida,
Maximum Allowable Surface Pressure (MASP) dan waktu operasi. Setelah itu hasil
pekerjaan squeeze dianalisis secara kualitatif dan kuantitatif menggunakan analisis
kurva CBL-VDL, log USIT, dan performa produksi sumur.
Total cement slurry yang dibutuhkan adalah sebanyak 5.27 bbl atau 17 sack.
Berdasarkan analisa CBL-VDL secara kualitatif dan kuantitatif setelah
dilakukannya squeeze cementing didapatkan nilai rata-rata compressive strength
sebesar 716.6 psi dan nilai rata-rata bond index sebesar 0.839, yang mana sudah
mencapai target cut off. Dari pembacaan USIT log juga menunjukan good bonding
cement. Lalu dari data produksi juga menunjukan adanya peningkatan performa
produksi dan penurunan harga water cut.
Kata kunci: Squeeze Cementing, Well integrity, CBL-VDL, USIT
vii
ABSTRACT
ANALYSIS OF REMEDIAL CEMENTING JOB TO ENHANCE
WELL INTEGRITY ASPECTS AT OTG-03 WELL, KJG FIELD.
By
Raka Permana Kinasih
NIM: 113200097
(Petroleum Engineering Undergraduated Program)
Analysis log CBL-VDL primary sealing well “OTG-03” on perforation zone or
depth interval 1639-1641 mMD has an amplitude price ranging from 10-39 mV,
with an average CS price of 195 psi, and an average bond index value of 0.46. On
the VDL curve for the arrival case reading and arrival formation can still be clearly
visible its shape, showing a poor cement bonding. From the USIT log and ALFA
log data also showed indications of chanelling or reverse flow of the casing from
its lower layer towards the perfroase zone. From the data production history,
conducted analysis of chan’s diagnostic plot, through plotting WOR and WOR
derivative values with production time, predicted the possibility of Near Wellbore
Water Channeling indications so that a mitigation plan such as squeeze cementing
operation is needed to solve the problem.
The methodology used in this writing is to analyze the VDL CBL curves both
qualitatively and quantitatively, which is correlated with the analysis of the USIT
and ALFA logs, as well as conducting production problem analysis through chan's
diagnostic plot. Evaluate the operational calculations of squeeze squeezing, which
includes calculation of slurry volume, additive volume, fluid column height,
Maximum Allowable Surface Pressure (MASP) and operating time. After that, the
squeeze work results are analyzed qualitatively and quantitatively using CBL-VDL
curve analysis, USIT log, and well production performance.
The total slurry cement needed was as much as 5.27 bbl or 17 sacks. Based on the
qualitative and quantitative analysis of the CBL-VDL after doing the squeeze
cementing obtained an average compressive strength of 716.6 psi and an average
bond index of 0.839, which has reached the cut off target. USIT log readings also
showed good bonding of cement. Then from production data also shows an
improvement in production performance and a fall in the price of water cut.
Keywords: Squeeze Cementing, Well integrity, CBL-VDL, USIT
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Squeeze Cementing, Well integrity, CBL-VDL, USIT |
| Subjects: | T Technology > T Technology (General) |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Eko Yuli |
| Date Deposited: | 19 Aug 2024 01:56 |
| Last Modified: | 19 Aug 2024 01:56 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/40733 |
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