MIERZA SAPUTRAUPN “V’

YOGYAKARTA

EVALUASI HASIL PRIMARY CEMENTING

BERDASARKAN ANALISA KURVA CBL-

VDL

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

FLOW CHAR

T

FREE PIPEGOOD CEMENTEDPARTIAL CEMENT (CHANNELING)CEMENT WITHOUT BOND TO FORM

ATION

ANALISA KUALITATIF

Amplitude t inggi

No formation signals

Chevron (W) pattern

FREE PIPE

Amplitude low

Strong formation signals

GOOD CEMENT

Amplitude low & moderate

Formation signal dan casing signal bervariasi

PARTIAL CEMENT

(CHANNELING)

Amplitude low

Casing & formation signals lemah atau t idak ada

CEMENT WITHOUT BOND TO FORMATIO

N

Bond Index

Compressive StrengthUsing chart

Sumber : Chevron Cement Bond Evaluation

ANALISA KUANTITATIF

BI > 0.8

CS >500

psiGOOD

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

SEKIAN & TERIMA KASIH