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MIERZA SAPUTRAUPN “V’
YOGYAKARTA
EVALUASI HASIL PRIMARY CEMENTING
BERDASARKAN ANALISA KURVA CBL-
VDL
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Mengetahui kualitas ikatan semen terhadap casing dan formasi (Bond Index dan Compressive Strength) pada proses primary cementing.
Dapat menganalisa apakah perlu dilakukan squeeze cementing atau tidak.
MAKSUD & TUJUAN
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FLOW CHAR
T
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FREE PIPEGOOD CEMENTEDPARTIAL CEMENT (CHANNELING)CEMENT WITHOUT BOND TO FORM
ATION
ANALISA KUALITATIF
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Amplitude t inggi
No formation signals
Chevron (W) pattern
FREE PIPE
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Amplitude low
Strong formation signals
GOOD CEMENT
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Amplitude low & moderate
Formation signal dan casing signal bervariasi
PARTIAL CEMENT
(CHANNELING)
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Amplitude low
Casing & formation signals lemah atau t idak ada
CEMENT WITHOUT BOND TO FORMATIO
N
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Bond Index
Compressive StrengthUsing chart
Sumber : Chevron Cement Bond Evaluation
ANALISA KUANTITATIF
BI > 0.8
CS >500
psiGOOD
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Kedalaman lubang borKondisi lubang bor (litologi, Grf, ukuran
lubang bor, spesifikasi casing, zona gas, zona garam)
Data TemperatureSifat fisik bubur semen (densitas, FL,
thickening time, free water, YP, PV, additif)
Kurva CBL-VDL
DATA-DATA YG DIPERLUKAN
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SEKIAN & TERIMA KASIH