EVALUASI PRIMARY CEMENTING CASING LINER 7” SUMUR MS-04 MENGGUNAKAN ANALISA CBL- VDL LAPANGAN “AK” PT. PERTAMINA EP ASSET 4

AKBAR, AHMAD (2023) EVALUASI PRIMARY CEMENTING CASING LINER 7” SUMUR MS-04 MENGGUNAKAN ANALISA CBL- VDL LAPANGAN “AK” PT. PERTAMINA EP ASSET 4. Other thesis, UPN "Veteran" Yogyajarta.

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Abstract

ix
RINGKASAN
EVALUASI PRIMARY CEMENTING CASING LINER 7”
SUMUR “MS-04” MENGGUNAKAN ANALISA CBL-VDL
LAPANGAN “AK” PT PERTAMINA EP ASSET 4
Oleh
Ahmad Akbar
NIM: 113190012
(Program Studi Sarjana Teknik Perminyakan)
Hasil penyemenan primer casing liner 7” pada kedalaman 7906-8540 ft dilakukan
evaluasi mengunakan CBL-VDL untuk mengetahui kekuatan semen dan bond
index yang di hasilkan memenuhi standar atau tidak. Indikasi hasil penyemenan
buruk dengan problem free pipe, channeling dan bad to formation terjadi hampir
di seluruh interval kedalaman penyemenan sehingga dapat menimbulkan problem
masuknya fluida yang tidak di inginkan yang menganggu produksi hidrocarbon.
Oleh karena itu perlu dilakukan analisa secara komprehensif agar dapat diambil
keputusan perlu atau tidaknya squeeze cementing terutama di zona prospek
kedalaman 8410-8520 agar saat sumur diproduksikan tidak mengalami kendala.
Evaluasi hasil penyemenan akan dilakukan menggunakan CBL-VDL yang akan di
analisa secara kualitatif meliputi pembacaan amplitudo pada CBL dan gelombang
sinyal VDL. Sedangkan analisa kuantitatif menghitung serta menganalisa
besarnya harga compressive strength dan bond index. Selanjutnya dilakukan pula
evaluasi desain bubur semen, pola aliran yang terbentuk pada spacer maupun
slurry dan thickening time serta operasional pelaksanaan penyemenan.
Berdasarkan hasil evaluasi penyemenan secara kuantitatif diperoleh compressive
strength buruk sebesar 93,75% (500<CS) dan bond index buruk sebesar 93,75%
(BI<0,44). Sedangkan analisa kualitatif diperoleh penyemenan dengan kategori
buruk 96,87% yang mengindikasikan free pipe, channeling. Terutama pada zona
prospek kedalaman 8410-8520 ft yang mengidikasihkan terjadi free pipe pada
hasil penyemenan. Secara keseluruhan hasil penyemenan tergolong buruk yang di
sebabkan oleh formasi yang kompleks, pola aliran yang terbentuk belum sesuai
dan desain thickening time terlalu lama sehingga disarankan melakukan squeeze
cementing untuk memperbaiki hasil penyemenan.
Kata kunci: Compressive strength, thickening time, bond index.
x
ABSTRACT
EVALUATION OF PRIMARY CEMENTING CASING LINER 7”
WELL “MS-04” USING CBL-VDL ANALYSIS OF “AK” FIELD
PT PERTAMINA EP ASSET 4
By
Ahmad Akbar
NIM: 113190012
(Petroleum Engineering Undergraduated Program)
The results of the 7” casing liner primary cementing at a depth of 7906-8540 ft
were evaluated using CBL-VDL to determine whether the cement strength and
bond index produced met the standards or not. Indications of bad cementing
results with free pipe, channeling and bad to formation problems occur in almost
all cement depth intervals so that it can cause unwanted fluid entry problems
which disrupt hydrocarbon production. Therefore it is necessary to carry out a
comprehensive analysis so that a decision can be made whether or not squeeze
cementing is necessary, especially at depths of 8410-8520 so that when the well is
produced there are no problems.
Evaluation of cementing results will be carried out using CBL-VDL which will be
analyzed qualitatively including reading the amplitude of the CBL and VDL
signal waves. While the quantitative analysis calculates and analyzes the price of
compressive strength and bond index. Furthermore, an evaluation of the cement
slurry design, the flow pattern formed in the spacer and slurry and thickening
time as well as the operational implementation of cement is also carried out.
Based on the quantitative evaluation of cement, it was found that a poor
compressive strength was 93.75% (500<CS) and a bad bond index was 93.75%
(BI<0.44). While the qualitative analysis obtained cement with a bad category of
96.87% indicating free pipe, channeling. Especially in the prospect zone with a
depth of 8410-8520 ft which indicates the occurrence of free pipes in the cement
results. Overall the cementing results are classified as poor which is caused by
complex formations, the flow patterns that are formed are not suitable and the
thickening time design is too long so it is advisable to do squeeze cementing to
improve cementing results.
Keywords: Compressive strength, thickening time, bond index.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Compressive strength, thickening time, bond index.
Subjects:	T Technology > T Technology (General)
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Eko Yuli
Date Deposited:	11 Jul 2023 02:28
Last Modified:	11 Jul 2023 02:28
URI:	http://eprints.upnyk.ac.id/id/eprint/36390

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