RANA, ALIFIA JIHAN (2023) EVALUASI KEGAGALAN PENYEMENAN PRIMER TRAJECTORY CASING 9 5/8” PADA EXISTING WELL (SUMUR “AJR-01”) LAPANGAN “SJ” BERDASARKAN ANALISA DATA CBL-VDL. Other thesis, UPN "Veteran" Yogyajarta.
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Abstract
vi
RINGKASAN
EVALUASI KEGAGALAN PENYEMENAN PRIMER
TRAJECTORY CASING 9 5/8” PADA EXISTING WELL
(SUMUR “AJR-01”) LAPANGAN “SJ” BERDASARKAN
ANALISA DATA CBL-VDL
Oleh
Alifia Jihan Rana
NIM: 113190147
(Program Studi Sarjana Teknik Perminyakan)
Hasil penyemenan primer pada casing 9 5/8 inch sumur “AJR-01”
mengalami kegagalan pada interval 2993 ft – 6993 ft yang disebabkan oleh pola
aliran turbulent yang melewati zona loss pada kedalaman 4095 ft – 5015 ft.
Sehingga perlu dilakukan re-design pada sumur “AJR-02” yang didasarkan pada
sejarah penyemenan sumur “AJR-01”. Penelitian ini dilakukan untuk mengevaluasi
hasil penyemenan sumur “AJR-01” dengan menggunakan hasil pembacaan kurva
dari kombinasi peralatan logging CBL – VDL dan merencanakan desain semen
pada sumur “AJR-02”.
Dari hasil evaluasi penyemenan yang didasarkan pada analisa kuantitatif
diperoleh Compressive Strength baik (CS>500) sebesar 49,44%, Compressive
Strength sedang (300<CS<500) sebesar 0,8%, dan Compressive Strength buruk
(CS<300) sebesar 49,76%. Untuk Bond Index baik (BI>0,8) sebesar 8,25% dan
Bond Index buruk (BI<0,8) sebesar 91,75%. Berdasarkan analisa kualitatif, dapat
disimpulkan kualitas penyemenan menunjukkan 49,76% berindikasi bad bond yang
terbagi menjadi channeling/microannulus, bad to formation, free pipe dan 49,44%
menunjukkan good bond. Maka dilakukan re-design sumur “AJR-02”
menggunakan metode dual stage cementing.
Dari hasil perencanaan penyemenan didapati stage I pada interval
kedalaman 5018 ft MD – 6993 ft MD volume slurry yang dibutuhkan sebesar 143,5
bbl dan stage II pada interval kedalaman 3045 ft MD – 5018 ft MD volume slurry
yang dibutuhkan sebesar 136 bbl. Untuk menempatkan slurry ke dalam lubang
annulus digunakan pola aliran turbulent pada stage I dan laminar pada stage II.
Thickening time pada stage I dan II sebesar 3 jam 36 menit dan 3 jam 12 menit,
sehingga dapat diperkirakan penyemenan yang dihasilkan baik.
Kata kunci: penyemenan, evaluasi, perencanaan, dual stage cementing.
vii
ABSTRACT
EVALUATION OF FAILURE THE PRIMARY CEMENTING OF
TRAJECTORY CASING 9 5/8” ON THE EXISTING WELL
(WELL “AJR-01”) OF THE SJ FIELD BASED ON CBL-VDL
DATA ANALYSIS
By
Alifia Jihan Rana
NIM: 113190147
(Petroleum Engineering Undergraduated Program)
The results of the primary cementing of the 9 5/8 inch casing of the "AJR-
01" well failed at intervals of 2993 ft - 6993 ft caused by a turbulent flow pattern
that passed through the loss zone at a depth of 4095 ft - 5015 ft. So it is necessary
to re-design the "AJR-02" well which is based on the history of cementing the "AJR-
01" well. This research was conducted to evaluate the results of cementing the
"AJR-01" well by using the results of reading the curve from the combination of
CBL - VDL logging equipment and planning the cement design of the "AJR-02"
well.
From the results of cement evaluation based on quantitative analysis, good
Compressive Strength (CS> 500) was obtained at 49.44%, moderate Compressive
Strength (300<CS<500) at 0.8%, and bad Compressive Strength (CS<300) at
49.76%. The good Bond Index (BI>0.8) is 8.25% and the bad Bond Index (BI<0.8)
is 91.75%. Based on the qualitative analysis, it can be concluded that cement
quality shows 49.76% indicating bad bond which is divided into
channeling/microannulus, bad to formation, free pipe and 49.44% indicating good
bond. Then a re-design of the "AJR-02" well was carried out using the dual stage
cementing method.
The results of cement planning, it was found that stage I at a depth interval
of 5018 ft MD – 6993 ft MD required slurry volume of 143.5 bbl and stage II at a
depth interval of 3045 ft MD – 5018 ft MD required slurry volume of 136 bbl. To
place the slurry into the annulus hole, a turbulent flow pattern is used in stage I
and laminar in stage II. Thickening time in stage I and II is 3 hours 36 minutes and
3 hours 12 minutes, so it can be estimated that the cement produced is good.
Keywords: cementing, evaluation, planning, dual stage cementing.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | cementing, evaluation, planning, dual stage cementing. |
| Subjects: | T Technology > T Technology (General) |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Eko Yuli |
| Date Deposited: | 07 Jul 2023 07:37 |
| Last Modified: | 07 Jul 2023 07:37 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/36349 |
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