WELL LOG
ANALYSIS
IN
PETROLEUM
EXPLORATION
AAPG UGM SC
Jogjakarta, 4 Oktober 2014
Pambudi Suseno, ST
PT. Pertamina EP ASSET 5
Data Diri
Married (1 istri, 2 anak laki laki semua)
0813-4775-8429
Pambudi.suseno@pertamina.com
Perum. The Paradise Cluster Rosemary No. B12 Sendangadi Mlati Sleman Jogja (Jalan
Palagan km.6.5)
Riwayat Kerja
2007 – 2008
2008 – 2012
2012– 2014
: Mud Logger Elnusa
: Operation Geologist PT. Pertamina EP
: Geologist PT. Pertamina EP
Spesialisasi
- Geomodeling in deltaic system
Tulisan
- Optimalisasi Perhitungan Gas Ratio Sebagai Identifikasi Awal Penentuan Zona Prospek
Minyak Pada Operasi Pemboran“studi Kasus Sumur B-154, Lapangan Bunyu”
- Evaluasi Pemasangan Casing 9.625 inch Pada Area Build dan Area Drop Pada Operasi
Pemboran
- Hydrocarbon Fluid Characterization Based on Chromatographic Gas Data Analysis Using
Gas Ratio Methods On Bunyu Nibung Structure Bunyu Field North Kalimantan
- Evolution Of Vertical And Lateral Reservoar Connectivity Of Sand-rich Deltaic Deposit
In 4th Order Genetic Sequences model in Sembakung Area Of Tabul Formation, Tarakan
Basin
- Insight From Modern Delta, Cores, Outcropes and Statistic to Subsurface Interpretation,
Getting the Farthermost Data to be Implemented for Development Strategy of Field with
Deltaic architecture Complex
OUT OF THE BOX
THINK & DO ……
PRESENTATION OUTLINE
1
BASIC OPEN HOLE LOG INTERPRETATION OVERVIEW
2
SHARING - SHARING
3
WORKSHOP
PRESENTATION OUTLINE
1
BASIC OPEN HOLE LOG INTERPRETATION OVERVIEW
2
SHARING - SHARING
3
WORKSHOP
Wireline Logging
Logging Unit
Conductor
Wireline
Looging Tool
Wireline
Logging
Operation
Operasi Well Logging
BOREHOLE ENVIRONMENT :
Borehole Diameter
Borehole Diameter
Caliper log
CALIPER LOGS
- Applications:
• Measure borehole diameter (borehole
geometry if multi-arm caliper tools
with 2 or 3 hole diameters
measurements 90° or 60° relative to
each other).
• Important measurement for drillers:
hole geometry, hole/cement volume.
• Hole diameters are an import input
parameter for the environmental
correction of petrophysical logs.
• Oriented multi-arm caliper logs are
used to identify principle stress
directions - “breakout log”
- Basic Quality Control:
Perform casing check - should read
nominal casing ID.
CALI, C1, C2 Washout: Shale zone?
Mudcake: Permable zone?
Invasion
Model Formasi (Lateral)
Open Hole (Mud)
Mud Cake
Invaded Zone : Rxo, Rmf, Sxo
Uninvaded Zone : RT, Rw, Sw
Standard Logging String (Triple Combo)
Formation Gamma Ray
Neutron Porosity
Density (Porosity)
Caliper (hole size)
Pad Resistivity (good v.resolution)
Resistivity (good depth investigation)
Spontaneous Potential
Mud Resistivity
HGNS
GR
24 in.
Highly Integrated
Gamma Ray
Neutron
Sonde
N
24 in.
TOOLS & EQUIPMENT
FOR
DATA ACQUISITION
Electronics
cartridge
HRMS
High-Resolution
Mechanical
Sonde
b, Pe
16 in., 8 in., 2 in.
Rxo, hmc
2 in.
Array
Induction
Imager
Tool
High-Resolution
Azimuthal
Laterlog
Sonde
HALS
Rt
12 in.
Conveyance
Open Hole Measurements :
• Wireline Logging.
• LWD (Logging While Drilling)
• Logging on Drill Pipe (TLC)
• Tractor
Standard Logs
•
Spontaneous Potential
•
Gamma Ray
•
Caliper
•
Resistivity
(Induction / Laterolog)
•
Density
•
Neutron Porosity
•
Akustik / Sonic
Spontaneous Potential (SP)
• Rekaman perbedaan potensial listrik antara elektroda di permukaan yang
tetap dengan elektroda di dalam lubang bor yang bergerak naik-turun
• Pada lapisan impermeable, tidak ada aliran arus listrik  SP Konstan
• Pada lapisan permeable terjadi defleksi Negatif (jika Rmf >Rw) atau Positif
(jika Rmf < Rw)
Shale
Base Line
Shale
Base Line
Examples of SP deflection from shale base line
SSP
Thick Clean
Wet Sand
Rmf = Rw
SP
Rmf > Rw
Rmf >> Rw
Rmf < Rw
Thin Sand
PSP
Thick Shaly
Wet Sand
SP
Thick Clean
Gas Sand
PSP
SSP (Static SP) is the maximum deflection
PSP (Pseudo SP) is SP response if shale is present
Thick Shaly
Gas Sand
Rw from SSP
SSP = −K log (Rmfe/Rwe)
• Static SP (SSP) can be obtained directly from the SP curve if the bed is clean, thick, porous,
permeable, and only moderately invaded. When these conditions are not met, the recorded SP
will need to be corrected. Various correction charts are available for this purpose.
To convert the measured mud filtrate resistivity Rmf into an equivalent mud filtrate resistivity
Rmfe, the following rules are employed:
• If Rmf at 75 °F is greater than 0.1 Ω·m, use Rmfe = 0.85 Rmf at formation temperature.
• If Rmf at 75 °F is less than 0.1 Ω·m, derive Rmfe from Rmf using Schlumberger Chart SP-2 or
equivalent.
Schlumberger Chart SP-2 can then be used to convert Rwe to obtain Rw.
Gamma Ray (GR)
• Rekaman tigkat radioaktivitas alami yang terjadi karena 3 unsur: uranium (U),
thorium (Th) dan potassium (K) pada batuan
• Mineral lempung mempunyai radioaktivitas tinggi (>100°API)
• Batupasir dan karbonat mempunyai radioaktivitas rendah (10 – 20 °API)
Total GR measurement
Bed definition:
• The tool reacts if the shale is radioactive (usually
the case), hence show the sands and shales, the
permeable zones and the non-permeable zones.
Used for inter-well correlation similar to SP.
• Also used for correlation between logging runs,
especially cased and open hole logs
Computation of the amount of shale:
• The minimum value gives the clean (100%) shale
free zone, the maximum 100% shale zone. All
other points can then be calibrated in the amount
of shale.
•
Vsh=(GRlog-GRsand)/(GRshale-GRsand)
GR clean
GR shale
GR log example
Which has better
vertical resolution,
SP or GR?
Resistivity
• Induction dan Laterolog
• Deep Resistivity
 mengukur resistivity uninvaded zone
• Shallow resistivity
 mengukur resistivity transition zone
• Mikro resistivity
 mengukur resistivity invaded zone
Logarithmic Resistivity Scale
0.2
2.0
1.0
20
10
Density
• Mengukur bulk density dari formasi
• Digunakan untuk :
• menghitung porositas (bersama dengan log neutron)
• mendeteksi zona gas
• Menghitung densitas hidrokarbon
• evaluasi shaly sand reservoir dan complex lithologies
• mendeteksi mineral evaporite
Porosity : Density
Density () = Wt / Vol
Porosity : Density
Density () = Vm(m) + Vf(f)
b = 1- Ø(m) + Ø(f)
Ø = (m- b ) / (m- f)
Neutron Porosity
• Mengukur konsentrasi ion hidrogen dalam formasi
• Karena ion hidrogen terkonsentrasi pada fluida pengisi pori, maka
pengukuran Log Neutron ~ porositas formasi
• Gas effect :
• Kandungan gas mengakibatkan pengukuran density rendah
• Konsentrasi hidrogen dalam gas rendah membuat pengukuran log neutron
rendah
 Terjadi separasi Density-Neutron
Porosity : Neutron
Neutrons are highly affected by
hydrogen. Oil and water are
both rich in H compared to
rocks
If we could estimate the amount
of hydrogen in a rock, and knew
how much H was in the water
or oil (H index) we could
compute porosity.
Problem is neutrons are also
affected by lithology
%H
Porosity : Neutron
Neutrons are sensitive to total hydrogen in the
formation.
Since most of the hydrogen is in the pore space,
the neutron tool is sensitive to porosity.
It is also sensitive to lithology, and thermal neutron
absorbers such as chlorine.
The calibrated ratio of neutrons detected by the
near and far detectors is proportional to porosity.
The raw output of a CNT tool is the ratio of count
rates detected by the far and near detector.
This is converted to porosity using one of 3
algorithms, lime, sand or dolo. The porosity is
called NPHI or TNPH
The parameter MATR in the dlis file indicates
which algorithm has been used.
The standard is to process with MATR=LIME.
Compatible scales
Neutron Porosity
•
•
•
The density tool is usually
run with the neutron
To aid quicklook
interpretation they are run
on “compatible scales”
This means that the scales
are set such that for a given
water bearing lithology the
curves overlay
Density on Limestone scale, neutron must
be processed in LS matrix
Density on Sandstone scale, neutron must
be processed in SS matrix
Photoelectric effect, Pe
Low energy GRs are absorbed by the
formation in a process called
photoelectric absorption.
The efficiency of this process is related
to the atomic number of the material the
GRs are in.
We can measure this effect and estimate
the lithology from the PEF.
Photoelectric factor, Pe
LogAn-35
Porosity : N-D
Gas Effect on Neutron Log
Porosity : N-D Cross Plot
Approximation
x 
d  n
2
x 
 
2
d
2
n
2
Sand + Calcite cement + Shale + gas + shallow invasion
How accurate is the porosity?
Remember it is raised to the power of m in the Archie equation
Matrix dependent porosity
Density – Neutron crossover
Typical neutron density responses
Vshale
n d
Vsh 
shale
In this form it only works
when the log is processed
assuming the correct
matrix, and no gas is
present.
Effective porosity - PhiE
Porosity associated with the shale in a
formation is none permeable, so not
considered “effective”.
Effective porosity PhiE is the porosity
associated with the clean part of the
formation only.
e  t  Vcl WCP 
WCP = Wet Clay Porosity
PhiE
PhiT
Dry Sand
Dry Shale
Vcl
Sonic
• Mengestimasi porositas formasi
• Identifikasi loitologi
• Interval velocity untuk korelasi dg seismik
• Determinasi porositas sekunder (digabung dengan
density/neutron)
Sonic Porosity
•
•
•
•
The porosity from the sonic slowness is different than that from the density or
neutron tools
It reacts to primary porosity only, I.e. it doesn’t “see” the fracture or vugs
The difference between the sonic porosity and the neutron-density porosity gives
a Secondary Porosity Index (SPI) which is an indication of how much of this type of
porosity there is in the formation
The basic equation for sonic porosity is the Wyllie Time Avearge:
tlog  t f  1   t ma
t log  t ma

t f  t ma
Sonic Porosity
•
•
The Wyllie Time Average equation is very simple with the inputs of a matrix
slowness and a fluid slowness
There is another possibility for transforming slowness to porosity, called Raymer
Hunt Gardner, this formula tries to take into account some irregularities seen in
the field. The basic euqation is:
1 (1   ) 2 


t
t ma
t fl
•
A simplified version used on the Maxis is: (C is a constant, usually taken as 0.67 )
 C
t log  t ma
t log
Sonic Example
Sidewall Core (SWC)
• Mengambil sample batuan dari dalam lubang bor untuk dideskripsi
dan dianalisa di Lab.
Formation Tester
• Determinasi tekanan formasi
• Estimasi permeabilitas secara kuantitatif
• Mengambil sample fluida formasi untuk dianalisa
• Penentuan gas/oil/water contact berdasarkan analisa gradien tekanan
• Melihat kontinuitas vertikal formasi
Advanced Tools
• Formation Micro Imager (FMI / FMS / EMI / STAR)
• Dipole Shear Sonic Imager (DSI / X-MAC)
• Nuclear Magnetic Resonance (CMR / MRIL)
• Elemental Capture Spectroscopy (ECS)
• DLL
Interpretasi Log memberi informasi :
• Litologi
• Ketebalan reservoir
• Porositas
• Permeabilitas
• Saturasi Air
• Jenis fluida
• Fluid contacts
• Ukuran lubang sumur
• dll
Petrophysical Workflow
Petrophysical Workflow
Metoda Log Analysis :
1. Quick Look Evaluation
2. Detail Evaluation (deterministik)
3. Advanced Evaluation (Statistik)
LogAn-54
INTERPRETASI LITOLOGI :
Density
Neutron Por
GR
SP
0
-80
150
120
1.7
0.6
2.7
0
Shale
Coal
Shale
Permeable
Fine Sandstone
Coarse Sst
Berdasarkan Log :
•
•
•
•
Gamma Ray
Density
Neutron
Sonic
Shale
Limestone
Non
Permeable
GR SP
N
Shale
b
LogAn-55
TVS – 09/04
INTERPRETASI KUALITATIF RESERVOIR :
Density
Neutron Por
GR
SP
0
-80
150
120
1.7
0.6
2.7
0
Resistivity
0.2
2000
Permeable
Coal
•
•
•
•
•
Gamma Ray --- Rendah
Density --- Rendah
Neutron --- Porous
Sonik --- Lambat
SP --- Ada defleksi
(permeable)
Hydrocarbon
Interpretasi Fluida
Hydrocarbon
GR SP
Non
Permeable
Batuan Reservoir :
N
b
Water
RT
Berdasarkan
Log Resistivity :
• RT sangat tinggi = gas
• RT tinggi = minyak
• RT rendah = Air
LogAn-56
TVS – 09/04
LogAn-57
TVS – 09/04
Lithology
Denstity
(g/cc)
Average Pe
Sandstone
2.65
1.8
Limestone
2.71
4.8
Dolomite
2.876
3.0
Anhydrite
2.977
5.05
Salt
2.032
4.6
LogAn-58
Sw Calculation
Parameters:
• Porosity
• Rw
• a
• m
• n
LogAn-59
Archie Equation
Sw
n
a Rw
 m
 Rt
LogAn-60
Perhitungan Porositas
Dari Sonic / Acoustic Log :
• WYLIE formula
PHIS = (t-tMA)/(tF-tMA) * 1.0/Cp
dimana : t
= Sonic transit time
Cp = Compaction factor
• RAYMER HUNT GARDNER formula:
PHIS = (1.0 - tMA) / t * 0.69/Cp
(Cp should be set to 1.0 for standard RHG formula)
TVS – 09/04
LogAn-61
Penetuan Porositas Batuan
1. PENGUKURAN LANGSUNG (Analisa Lab) :
•
•
Conventional Core
Side Wall Core :
1.
2.
Conventional SWC
Rotary SWC
2. PENGUKURAN TAK LANGSUNG / PENDEKATAN :
•
•
•
•
NEUTRON LOG
DENSITY LOG
SONIC / ACOUSTIC LOG
NUCLEAR MAGNETIC RESONANCE LOG
TVS – 09/04
LogAn-62
Penentuan Porositas dari Log
1. Neutron
2. Density
3. Kombinasi D & N
Ø:
ma - b
ma - f
Ø:
ØD + ØN
2
Ø:
7Ø D + 2Ø N
9
4. NMR (Nuclear Magnetic Resonance)
(Water & Oil zones)
(Gas zone)
METODA PENENTUAN Rw :
1.
2.
Rw dari katalog (data sumur acuan)
Rasio
Rw :
Rw :
Rt x
Ø
3.
Rwa
4.
5.
Rw dari SP ( SSP = -K log (Rmf / Rw) )
Picket Plot (x-plot antara log PHI vs log RT)
TVS – 09/04
m
Rmf @ TF
Rxo @ CWBZ
. Rt
a
LogAn-64
Rw from SSP
Under certain circumstances Rw
can be estimated from SP.
• The SP value remains constant for
at least 30 feet.
• The area where the SP is constant
must correspond to a very clean
sandstone.
• The value of Rmf must remain
constant across this same interval.
These conditions are rare, and
large errors in the Rw estimate
may occur.
Use this technique with care!
Rmfeq
SSP   K c log
Rweq
Rweq 
Rmfeq
10
SSP
 kc
K c  61  0.133T F 
K c  65  0.24TC 
R weq , R mfeq : Chart _ SP.2
LogAn-65
Rw from SSP
SSP = −K log (Rmfe/Rwe)
• Static SP (SSP) can be obtained directly from the SP curve if the bed is clean, thick,
porous, permeable, and only moderately invaded. When these conditions are not
met, the recorded SP will need to be corrected. Various correction charts are
available for this purpose.
To convert the measured mud filtrate resistivity Rmf into an equivalent mud filtrate
resistivity Rmfe, the following rules are employed:
• If Rmf at 75 °F is greater than 0.1 Ω·m, use Rmfe = 0.85 Rmf at formation
temperature.
• If Rmf at 75 °F is less than 0.1 Ω·m, derive Rmfe from Rmf using Schlumberger Chart
SP-2 or equivalent.
Schlumberger Chart SP-2 can then be used to convert Rwe to obtain Rw.
Oct-14
LogAn-66
Variation of M Value
FRACTURE POROSITY
A.
Sw = 1.0
VUGGY POROSITY
Cb =  m C f
M  1.0
C.
Sw = 1.0
INTERGRANULAR OR INTERCRYSTALLINE
POROSITY
Cb =  m C f
Sw = 1.0
B.
Cb =  m C f
M  2.0
M > 2.0
PATH OF CURRENT
FLOW
LogAn-67
Water Saturation : Archie equation - variations
•Nigeria Equation
2

e  2
1 V


Sw

Rt  Rcl
Rw 


 Vcl 
 1 
2 
cl 
•Indonesia Equation
1 Sw 2 BQvSw
 * 
Rt F Rw
F*
•Waxman-Smits Equation
•Dual Water Equation
2
e  n
1  Vcl 1.4


Sw

Rt
R
aRw
 cl

m
2
Ct 
tmSwtn 

Swb
Ct 
Cwb Cw 
a 
Swt

LogAn-68
Jenis Korelasi
• Korelasi Struktural
– Datum: MSL
– Mengikuti konfigurasi struktural
– Dikaitkan dengan pengikatan seismik
• Korelasi Stratigrafis
– Datum: marker stratigrafis (coal, ravinement
surfaces, paleosoil, etc.)
– Melihat distribusi batuan pada saat diendapkan
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All Rights Reserved.
Depth Types
• Hubungan antara MD, TVD, and TVDSS....
2-12
Jenis Borehole
• Vertikal
• Directional / berarah (intended & unintended)
– Low Angle
– High Angle
• Horizontal
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Borehole Survey
• Akuisisi:
– TOTCO (single inclination)
• Gyro
• Multishot (terpengaruh oleh medan magnet)
– Geosteering (per joint)
– Dipmeter measurement
• Representasi:
– Position Log (X, Y, Z)
– Directional (MD, Inclination, Deviation)
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All Rights Reserved.
Impact Jenis Borehole
• Dikenal istilah “Isochore” yang mengukur
ketebalan suatu lapisan:
– TVDT (true vertical depth thickness)
– MDT (measured depth thickness)
– TVT (true vertical thickness)
– TST (true stratigraphic thickness)
– Other
10-59
Resolusi Vertikal
•
•
•
•
•
•
Seismic: 20 – 60 m
Log-log lama (analog): 0.5 – 1 m
Log-log baru (digital): 0.1 – 0.5 m
Micro Devices: 0.2 cm ( 2 mm)
Conventional Core: Resolusi Visual
Petrografi: 0.1 mm
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All Rights Reserved.
Model Geologi
Sebelum korelasi:
• Pahami model geologi
daerah kajian
• Pakai bantuan seismic
untuk melihat
cakupan lateral
• Lihat data sumur
untuk resolusi vertikal
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Skala Korelasi
• Regional: Marker Paleontologi,
Chronostratigrahy, Sequence Stratigraphy
• Field: Lithostratigrafi, Sequence Stratigraphy
• Reservoir: Flow Unit (fungsi porositas,
keserpihan, permeabilitas relatif dan jenis
fluida)
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Lintasan & Proyeksi
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Boundary
Deffinition of Exxon Sequence Boundaries (Unconformities) Compared with the Galloway Genetic
Stratigraphic Sequence Boundaries (Maximum Flooding Surfaces, Max FS)
Transgressive lag
on unconformity
SE
HST
EXXON
RT
TST
SL-2
IT
WB 3
WB 2
B
A
SL-1
5-15 m
WB-1
RT - Resumed Transgression
IT - Initial Transgression
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SL - Seal Level
WB - Wave base
SE - Subaerial Erosion
Repeated Picks
• Pada Thrust Fault
• Pada horizontal well
6-83
Missing Pick (?)
• Tergantung pada
posisi sumur
ataupun besarnya
lateral
displacement,
pada normal fault
suatu marker bisa
hilang atau tetap
ada
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Log Motif
• Korelasi mempergunakan bantuan POLA atau MOTIF
dari log listrik.
• Umumnya mempergunakan pair GR – Deep
Resistivity
• Bersifat fleksibel
• Satu motif log bisa terjadi / terbentuk pada beberapa
jenis lingkungan pengendapan.
• Selalu bandingkan hasilnya dengan melihat motif loglog lainnya, terutama jika ada indikasi “hot sand”
atau “hot carbonate”
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Where are you ?
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Teknik Korelasi
• Umumnya dilakukan dengan membandingkan motif
dari suatu/beberapa kurva disuatu sumur ke kurva
padanan di sumur disekitarnya. Teknik ini
memerlukan pemahaman kondisi geologi yang
dihadapi.
• Ada yang mencoba melihat “waveform” dari motif
kurva dan kemudian membandingkan secara statistik
ke sumur-sumur disekitarnya (“neural network”).
Teknik ini sering menimbulkan mis-leading dengan
konsep geologi yang ada. Perlu data sumur kontrol
yang banyak untuk melihat konsistensinya dengan
model geologi
6-85
Parasequence
Beach environment on a sandy, wave or fluvial dominated shoreline
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Parasequence
Beach environment on a sandy, wave or fluvial dominated
shoreline
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Parasequence
Beach environment on a sandy, wave or fluvial dominated
shoreline
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Parasequence
Tidal flat to subtidal environment on a muddy, tide dominated
shoreline
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Parasequence
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LOW STAND SYSTEMS TRACT
- BASIN FLOOR FAN
SP or GR
UPPER BOUNDARY
•
SF
•
CONDENSED
SECTION
(tbfs)
•INTERVAL
Amalgamated
Turbidite Sands
Winnowed Sands or
BF
Contourite Sands
(SB)
HST/TST
Hemipelagic Shale
Hemipelagic shale or channel / overbank apron facies
above boundary
Sharp boundary with minimal transition
•Turbidite sands
• Amalgamated massive turbidite sands
• Unamalgamated massive turbidite sands,
• with shale breaks
• Minor erosional surfaces within sand
• Commonly a major erosional surface at top of fan
• May be remnant fan mounds
• Redeposited massive shingled sands bordering
fan mounds
•Contourite sands
• Redeposited massive sands in separate mounds
SEQUENCE BOUNDARY
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•Massive sand above hemipelagic shale
(railroad track shale)
•Sharp boundary
•No erosion at base except sometimes at proximal portion of
fan
Vail and Wornard, 1990
LOW STAND SYSTEMS TRACT
- SLOPE FAN
UPPER BOUNDARY
SP or GR
•
S.P. or G.R.
•
•
LPW
CS
AF
ICES
ICES
CHANNEL/
OVERBANK
UNIT 2
ICES
ICES
MULTISTORY
SANDS
CHANNEL
FILL
INTERVAL
•
•
BCES
SF
•
•
•
AL
A
AF
OB
CHANNEL/
OVERBANK
UNIT 1
AL
AL
CF
Crescent shape to individual channel / overbank units
Within channel / overbank units, sands thicken, then thin
upward
1-10 channel / overbank units within each slope fan
Proximal facies may be highly sand-prone near source
Channel fill facies may be :
• Massive turbidite sands
• Massive turbidite sands fining upward with sharp bases
• Mudstone-fine grained turbidites
LOWER BOUNDARY
BF
•
S.B.
LEGEND
AF - Abandonment Facies
CF - Channel Fill
OB - Overbank
AL - Attached Lobes
- Apron Confidential.
LandmarkA ©2004
All Rights Reserved.
Downward shift from hemipelagic shale to laminated fine
grained turbidites
Fining upward digitated log character below boundary
Faunal abundance peak
ICES -
Interval Channel
Erosional Surface
BCES -
Basal Channel
Erosional Surface
•
•
Hemipelagic shale with faunal abundance peak commonly at
base of slope fan
Lies on Sequence Boundary or on Low Stand Systems Track Basin
Floor Fan
Boundary commonly conformable in basin and erosional on
slope
Vail and Wornard, 1990
LOW STAND SYSTEMS TRACTPROGRADING COMPLEX
TRANSGRESSIVE SURFACE
SPS.P.or
or G.R.GR
Transition from upward shallowing to upward deepening
Toplap common below boundary
Transgressive surface of erosion (ravinement surface)
on the shelf
HST
TST
INTERVAL
Thick intervals of coarsening upward sands common near top
Shoreface and deltaic sands typical
Progrades laterally into bathval hemipelagic shale
Pinches out near offlap break of underlying highstand
May contain shingled turbidite mounds at base
pc
LST
CS
LOWER BOUNDARY
st
Landmark ©2004 Confidential.
All Rights Reserved.
Condensed Section
Maximum clay-shale point
Faunal abudance peak
Downlap common above boundary
Vail and Wornard, 1990
TRANSGRESSIVE SYSTEMS TRACK
MAXIMUM FLOODING SURFACE
SP or GR
HST
Commonly lowest resistivity-highest gamma
Most clay rich shale (most starved)
Faunal abundance peak
Apparent truncation common below boundary
Downlap common above boundary
INTERVAL
TST
HST
Individual parasequences prograde, fine and thin upward (backstep)
Beach and shoreface sands common near base
Basinal equivalent is thin hemipelagic shale
Correlation is good, but backstepping transgressive surface of erosion
are time-transgresive
Sands often better sorted than HST
Authigenic minerals common
SEQUENCE BOUNDARY
Onlaps sequence boundary
Commonly Transgressive surface of erosion (ravinement surface)
over LST, IVF or older shelf sediments near shelf edge
Nonmarine sediments (coastal plain, coal or lake sediments) onlap
sequence boundary in more landward areas
Transgressive surface at base of TST
Landmark ©2004 Confidential.
All Rights Reserved.
Vail and Wornard, 1990
HIGH STAND SYSTEMS TRACT
SP or GR
SEQUENCE BOUNDARY
Onlap above boundary
Lowstand erosion on shelf
Incised valleys on shelf
Canyon cuts and slump scars on upper slope
Truncation or toplap below boundary
Fluvial (meandering streams, alluvial fans) below boundary
in more landward areas
TST
INTERVAL
Coarsening and shallowing upward sand and silt interbedded
Shoreface & deltaic sands near top
Progrades laterally into offshore shales
Basinal equivalent is hemipelagic shales
Log correlation is difficult in upper part
Reservoir continuity is fair to poor
HST
CS
MAXIMUM FLOODING SURFACE
TST
Landmark ©2004 Confidential.
All Rights Reserved.
Commonly lowest resistivity-highest gamma
Most clay rich shale (most starved)
Faunal abudance peak
Downlap common above boundary
Apparent truncation common below boundary
Vail and Wornard, 1990
PRESENTATION OUTLINE
1
BASIC OPEN HOLE LOG INTERPRETATION OVERVIEW
2
SHARING - SHARING
3
WORKSHOP
FACIES VALIDATION OF SEMBAKUNG AREA
SBK-15 (SSTVD)
Bentuk Log :
Cylindrical / Bell Shape
Distributary channel facies
Lower Delta Plain
Bentuk Log :
Funnel Shape
Mouth Bar facies
Delta Front
Electrofacies define
core & log data
DELTAIC FACIES DOMAIN
from
ARCHITECTURE OF INDIVIDUAL DELTAIC PARASEQUENCES SEMBAKUNG AREA
THIRD ORDER
GENETIC SEQUENCE
GENETIC SEQUENCE
FOURTH ORDER
GENETIC SEQUENCE
DELTAIC CYCLE
MF_4
INDIVIDUAL DELTAIC
PARASEQUENCE
MF_4
MF_3
INDIVIDUAL DELTAIC
PARASEQUENCE
Prodelta
Shale
MF_2
MF_1
MF_3
Thick shale
interval
Thick shale
interval
Prodelta
Shale
Top View
Pie chart of facies distribution VS Sweetness distribution
560500
561000
561500
562000
562500
563000
563500
564000
564500
565000
565500
566000
566500
567000
567500
568000
566000
566500
567000
567500
568000
427000
427000
560000
426500
426500
SBK#PX-A FINAL
SBK-3
SBK-12
SBK-59
SBK#PX-A SBK-11
SBK-14
SBK-58
SBK-8
SBK#PY-A
426000
SBK-21
SBK-20
SBK-25 SBK-57
SBK-22
SBK-26
SBK-61
SBK-28
SBK-17
SBK-2
SBK-19
SBK-40
SBK-7
SBK-10
SBK-9
SBK-16A
SBK-1 SBK-15 ESBK-1
SBK-60
SBK-39
SBK#P8-A
SBK-18
SBK-41
SBK-62
SBK-63
SBK-27
SBK-24
SWSBK-2 SBK-55
SBK-56
SBK#P4-A
SBK-5
SBK-6
425000
SBK-53
SBK-54
SWSBK-1
425000
425500
425500
SBK-23
426000
SBK-13
ESBK-2
SBK-52
424500
424500
SBK-38
SWSBK-3 SBK-46
SBK-51 SBK-47
SBK-30
SBK-34
SBK-44
424000
SBK-43
424000
SBK-29
SBK-42
SBK-35
SBK-45
SBK-49 SBK-4 SBK-37
SBK-36
SBK-48
SBK-33SBK-32
423500
423500
SBK-50
423000
423000
SBK-31
560000
560500
561000
561500
562000
562500
563000
563500
564000
564500
565000
565500
East View
West View
HISTOGRAM
SCALE UP
2000
2200
2400
2600
2800
3000
3200
3400
3600
3800
4000
4200
4400
4600
4800
5000
N
1400
1600
1800
2000
2200
2400
2600
2800
3000
3200
3400
3600
3800
4000
4200
4400
4600
4800
-2000
-2400
-2400
-2000
-2400
S
-1600
-2000
-2800
-3200
-2800
600
800
Facies
1000m
1400
1600
1800
2000
2200
2400
2600
2800
3000
3200
3400
3600
3800
4000
4200
4400
4600
4800
5000
0
200
400
600
800
Facies
1000m
Dist. Channel
Mouth Bar
Background
1:16384
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
3200
3400
3600
3800
4000
4200
4400
4600
4800
-3600
Dist. Channel
Mouth Bar
Background
1:16384
-3600
-3600
400
-3600
200
-3200
-3200
-3200
0
CHANNEL VARIOGRAM
MOUTHBAR VARIOGRAM
-2800
-2800
1200
-1600
E
-1600
1800
-2000
1600
-2400
1400
-1600
W
563600
564000
428000
427600
427200
426800
426400
428000
427600
426000
426000
425600
425600
425200
425200
424800
424800
424400
424000
423600
423200
426000
425600
425200
424800
424400
424400
424000
423600
423200
426400
426000
425600
425200
424800
424400
424000
424000
423600
423200
SBK-36
SBK-32
SBK-48
SBK-43
564400
564800
565200
565600
566000
0
200
400
600
800
1000m
423200
SBK-31
563200
SBK-37
423600
562800
SBK-35
424000
566000
424400
565600
424800
565200
SBK-29
SBK-49
SBK-42
SBK-4
SBK-45
SBK-50
1000m
1:19531
425200
564800
425600
564400
426000
564000
800
426400
423600
426800
423200
427200
3rd ORDER GENETIC SEQUENCE (B)
427600
563600
428000
563200
600
423200
562800
SBK-31
400
SBK-18
SBK-38
SBK-30
SBK-34
SBK-44
ESBK-2
SBK-46
SBK-51SBK-47
SBK-33
SBK-43
200
SBK-6
SBK-36
SBK-32
SBK-48
0
ESBK-1
SBK-60
SBK-15
SBK-16A
SBK-62
SBK-63
SBK-5
423600
566000
424000
565600
SBK-35
SBK-37
SBK-10
SBK-1
SBK-39
SBK-24
SBK-41
SWSBK-1
SBK-52
SBK-27
SWSBK-3
424400
565200
424800
564800
SBK-7
SBK-9
SBK-19
SBK-54
SBK-53
SBK-50
1000m
1:19531
SBK-56
425200
564400
425600
564000
426000
563600
800
426400
563200
600
426800
562800
SBK-31
400
423200
1:19531
200
427200
SBK-43
0
SBK-28
SBK-2
SBK-40
SBK-26
SBK-23
SBK-29
SBK-33
SBK-50
1000m
423200
800
566000
SBK-11
SBK-57
SWSBK-2
SBK-18
SBK-38
SBK-30
SBK-34
SBK-44
ESBK-2
SBK-49
SBK-42
SBK-4
SBK-45
423600
423600
600
ESBK-1
SBK-6
SBK-46
SBK-51SBK-47
SBK-36
SBK-32
SBK-48
SBK-50
400
SBK-35
SBK-37
565600
SBK-25
SBK-17
SBK-60
SBK-15
SBK-52
SBK-27
SWSBK-3
424000
424000
SBK-43
200
SBK-8
SBK-21
SBK-55
SBK-10
SBK-1
SBK-39
SBK-29
SBK-33
565200
SBK-61
SBK-16A
SBK-62
SBK-63
SBK-5
SWSBK-1
424400
424400
SBK-36
SBK-32
SBK-48
0
SBK-6
SBK-49
SBK-42
SBK-4
SBK-45
SBK-26
SBK-24
SBK-41
SBK-53
564800
SBK-3
SBK-13
SBK-22
SBK-2
SBK-40
SBK-7
SBK-9
SBK-19
SBK-54
SBK-56
424800
424800
SBK-35
SBK-37
SBK-33
564400
SBK-14
SBK-28
SWSBK-2
SBK-18
SBK-38
SBK-30
SBK-34
SBK-44
ESBK-2
SBK-46
SBK-51SBK-47
SBK-29
SBK-49
SBK-42
SBK-4
SBK-25
SBK-23
425200
425200
SBK-52
SBK-27
SWSBK-3
SBK-18
SBK-38
SBK-30
SBK-34
SBK-44
ESBK-2
SBK-46
SBK-51SBK-47
ESBK-1
SBK-60
SBK-15
SBK-16A
SBK-62
SBK-63
SBK-5
SWSBK-1
564000
SBK-20
SBK-11
SBK-57
SBK-55
SBK-10
SBK-1
SBK-39
SBK-24
SBK-41
SBK-53
563600
SBK-61
SBK-7
SBK-9
SBK-19
SBK-54
SBK-56
563200
SBK-59
SBK-12
SBK-17
SBK-2
SBK-40
SWSBK-2
SBK-6
SBK-52
SBK-27
SWSBK-3
SBK-45
SBK-8
SBK-21
425600
425600
SBK-16A
SBK-62
SBK-63
SBK-5
SWSBK-1
ESBK-1
SBK-60
SBK-15
562800
566000
SBK-58
SBK-13
SBK-22
SBK-61
SBK-10
SBK-1
565600
SBK-3
SBK-28
SBK-26
SBK-23
565200
427600
SBK-25
SBK-11
SBK-57
SBK-55
564800
SBK-20
SBK-17
SBK-2
SBK-40
SBK-39
SBK-24
SBK-41
564400
428000
SBK-8
SBK-21
SBK-13
SBK-22
SBK-28
SBK-7
SBK-9
SBK-19
SBK-54
SBK-53
564000
SBK-14
426000
SBK-11
SBK-57
SWSBK-2
563600
SBK-58
SBK-61
SBK-56
563200
SBK-59
SBK-12
SBK-3
SBK-58
426000
SBK-25
SBK-26
562800
SBK-20
SBK-17
SBK-23
566000
SBK-14
SBK-20
SBK-55
565600
426400
SBK-58
SBK-8
SBK-21
565200
SBK-59
SBK-12
SBK-3
SBK-14
SBK-13
SBK-22
564800
426800
SBK-59
SBK-12
564400
427200
564000
427200
427600
563600
427600
427200
563200
428000
426400
426800
562800
426800
566000
426400
565600
428000
565200
427600
564800
427200
564400
426800
564000
426400
563600
428000
563200
SEDIMEN
SUPPLY
426800
1:19531
SBK-31
UPWARD TRANSGRESSIVE
STACKING OF
SEDIMENT
LESS NET SAND, LESS CONNECTED
562800
563200
563600
564000
564400
564800
565200
565600
566000
562800
563200
563600
564000
564400
564800
565200
565600
566000
UPWARD REGRESSIVE STACKING OF SEDIMENT
MORE NET SAND, MORE CONNECTED, MORE DEPLETED
3rd ORDER GENETIC SEQUENCE NET SAND MAP (A)
562800
563200
563600
564000
564400
565600
428000
425600
427600
427200
426800
426400
426000
425600
426000
425200
424800
426000
425600
425200
425200
424800
423600
424400
426800
426400
423200
423200
426400
426000
425600
424800
424800
424400
424000
423600
424000
427600
427200
427600
427200
426800
423200
SBK-48
SBK-43
564400
564800
565200
565600
566000
0
200
400
600
800
1000m
1:19531
SBK-31
UPWARD TRANSGRESSIVE STACKING OF
SEDIMENT
LESS NET SAND, LESS CONNECTED
562800
563200
423200
UPWARD REGRESSIVE STACKING OF SEDIMENT
MORE NET SAND, MORE CONNECTED, MORE DEPLETED
564000
SBK-36
SBK-32
423600
SBK-31
563600
424000
563200
424400
562800
424800
566000
SBK-35
SBK-37
SBK-50
1000m
1:19531
425200
565600
800
425600
565200
600
423200
564800
400
426000
SBK-43
200
SBK-29
SBK-49
SBK-42
SBK-4
SBK-33
SBK-48
0
426400
424400
426800
424000
427200
423600
427600
SBK-45
423600
564400
SBK-36
SBK-32
424000
564000
SBK-35
SBK-37
SBK-6
SBK-18
SBK-38
SBK-30
SBK-34
SBK-44
ESBK-2
SBK-46
SBK-51SBK-47
SBK-50
SBK-31
563600
SBK-49
SBK-42
SBK-4
ESBK-1
SBK-60
SBK-15
SBK-16A
SBK-62
SBK-63
SBK-5
SBK-52
SBK-27
SWSBK-3
424400
563200
424800
562800
425200
565600
425600
565200
SWSBK-1
SBK-10
SBK-1
SBK-39
SBK-24
SBK-41
SBK-29
SBK-33
1000m
1:19531
426000
564800
800
426400
564400
600
426800
564000
400
427200
563600
SBK-45
SBK-36
SBK-32
423200
563200
SBK-31
200
SBK-7
SBK-9
SBK-19
SBK-54
SBK-56
SWSBK-2
SBK-18
SBK-38
SBK-30
SBK-34
SBK-44
ESBK-2
SBK-46
SBK-51SBK-47
423600
562800
SBK-35
SBK-37
SBK-28
SBK-2
SBK-40
SBK-26
SBK-23
SBK-55
SBK-53
SBK-52
SBK-27
SWSBK-3
424000
1:19531
0
ESBK-1
SBK-16A
SBK-62
SBK-63
SBK-5
SBK-6
SBK-50
1000m
423200
800
SBK-49
SBK-42
SBK-4
SBK-43
SBK-50
600
SBK-11
SBK-57
SBK-13
SBK-22
SBK-60
SBK-15
SBK-29
SBK-48
423600
SBK-43
400
SBK-18
SBK-38
SBK-30
SBK-34
SBK-44
ESBK-2
SWSBK-1
SBK-10
SBK-1
SBK-39
SBK-24
SBK-41
SBK-53
SBK-6
SBK-33
SBK-48
200
427600
SBK-16A
SBK-62
SBK-63
SBK-5
SBK-45
SBK-25
SBK-61
SBK-7
SBK-9
SBK-19
SBK-54
SBK-56
424400
SBK-36
SBK-32
ESBK-1
SWSBK-2
SBK-46
SBK-51SBK-47
424000
SBK-35
SBK-37
SBK-10
SBK-1
SBK-52
SBK-27
SWSBK-3
424400
SBK-49
SBK-42
SBK-4
SBK-8
SBK-21
SBK-17
SBK-28
SBK-2
SBK-40
SBK-26
SBK-23
SBK-55
SBK-60
SBK-15
SBK-29
SBK-33
0
SBK-17
424800
424800
SWSBK-1
SBK-58
SBK-61
SBK-39
SBK-24
SBK-41
SBK-3
SBK-14
SBK-20
SBK-11
SBK-57
SBK-13
SBK-22
425200
SWSBK-2
SBK-18
SBK-38
SBK-30
SBK-34
SBK-44
ESBK-2
566000
SBK-59
SBK-12
SBK-25
425600
425200
SBK-45
SBK-8
SBK-21
SBK-28
SBK-2
SBK-40
SBK-7
SBK-9
SBK-19
SBK-54
SBK-56
SBK-53
SBK-46
SBK-51SBK-47
565600
428000
SBK-11
SBK-57
SBK-26
SBK-23
SBK-55
SBK-60
SBK-15
SBK-52
SBK-27
SWSBK-3
565200
SBK-20
SBK-25
SBK-13
SBK-22
425600
ESBK-1
564800
SBK-3
426000
SBK-8
SBK-21
426000
SBK-10
SBK-1
SBK-16A
SBK-62
SBK-63
SBK-5
SBK-6
SWSBK-1
564400
SBK-14
SBK-61
SBK-39
SBK-24
SBK-41
SBK-53
564000
SBK-58
SBK-17
SBK-28
SBK-2
SBK-40
SBK-7
SBK-9
SBK-19
SBK-54
SWSBK-2
426400
426400
SBK-58
SBK-61
SBK-56
426800
426800
SBK-23
427200
427200
SBK-11
SBK-57
SBK-55
563600
SBK-20
SBK-17
SBK-26
563200
SBK-59
SBK-12
SBK-3
SBK-14
SBK-20
SBK-25
SBK-13
SBK-22
562800
427600
427600
SBK-3
SBK-14
SBK-8
SBK-21
566000
SBK-59
SBK-12
SBK-59
SBK-12
425200
565200
428000
SEDIMEN
SUPPLY
SBK-58
423200
564800
423600
565600
427600
565200
427200
564800
426800
564400
426400
564000
424400
563600
424000
563200
428000
562800
3rd ORDER GENETIC SEQUENCE (A)
3rd ORDER REGRESSIVE STACKING
562800
427200
3rd ORDER TRANSGRESSIVE STACKING
3rd ORDER GENETIC SEQUENCE NET SAND MAP (B)
427600
3rd ORDER REGRESSIVE STACKING
THIRD ORDER
GENETIC SEQUENCE
428000
3rd ORDER TRANSGRESSIVE STACKING
THIRD ORDER REGRESSIVE – TRANSGRESSIVE STACKING PATERN OF SEMBAKUNG AREA
563600
564000
564400
564800
565200
565600
566000
428000
427200
426800
426000
425600
425200
424800
424400
424000
423600
423200
425200
424800
424400
424000
423600
423200
428000
427600
427200
SBK-59
SBK-12
426400
SBK-3
SBK-14
SBK-58
426000
SBK-8
SBK-21
SBK-25
SBK-11
SBK-57
SBK-13
SBK-22
425600
425600
425200
SBK-7
SBK-9
SBK-19
SBK-54
SWSBK-2
424800
SBK-39
SBK-24
SBK-41
200
400
600
800
SBK-31
563600
564000
564400
ESBK-1
SBK-60
SBK-15
SBK-16A
SBK-62
SBK-63
SBK-5
SBK-6
SBK-52
SBK-27
SBK-18
SBK-38
SWSBK-3 SBK-46
SBK-30
SBK-34
SBK-47
SBK-44
SBK-51
ESBK-2
424000
424400
SWSBK-1
SBK-45
SBK-29
SBK-49
SBK-42
SBK-4
SBK-35
HIGH
COMPARTEMENTALIZATIO
N
RESTRICTED GEOMETRY
OF SAND
HIGHER OIL POTENTION
MORE EXPECTED OF NEW
POOL SAND RESERVOIR
SBK-37
SBK-36
SBK-32
SBK-48
SBK-43
SBK-50
1000m
1:19531
563200
SBK-10
SBK-1
SBK-33
564800
565200
565600
566000
423200
0
562800
SBK-28
SBK-2
SBK-40
SBK-26
SBK-23
SBK-55
SBK-56
423600
425200
424800
424400
424000
423600
423200
566000
426800
427600
427200
426800
426400
426000
426000
425600
425200
424800
424400
424000
423600
565600
0
200
400
600
800
1000m
1:19531
562800
563200
423200
423200
427600
428000
426000
425600
426000
425600
425200
424800
424400
424000
423600
423200
427600
427200
426800
426400
426400
426000
425600
425200
424800
424400
424000
565200
423600
423600
564800
424000
423200
426400
427600
427200
426800
426400
426400
426000
425600
425200
424800
424400
424000
423600
423200
428000
427600
427200
426800
3rd ORDER GENETIC SEQUENCE (B)
564400
424400
3rd ORDER GENETIC SEQUENCE (A)
564000
424800
3rd ORDER TRANSGRESSIVE STACKING
563600
425200
566000
566000
425600
565600
565600
426000
565200
565200
426400
SBK-36
SBK-32
SBK-43
423200
564800
564800
426800
SBK-37
SBK-48
423600
564400
SBK-35
424000
3rd ORDER REGRESSIVE STACKING
563200
SBK-50
1000m
564000
SBK-29
SBK-49
SBK-42
SBK-4
SBK-33
SBK-31
563600
424400
800
424800
600
1:19531
563200
425200
400
425600
200
426000
0
562800
426400
SBK-45
SBK-36
SBK-32
SBK-43
564400
427200
426800
565600
564000
427600
427200
SBK-35
SBK-37
SBK-48
423200
565200
SBK-31
SBK-53
SBK-60
SBK-15
SBK-16A
SBK-62
SBK-63
SBK-5
SBK-6
SBK-52
SBK-27
SBK-18
SBK-38
SWSBK-3 SBK-46
SBK-30
SBK-34
SBK-47
SBK-44
SBK-51
ESBK-2
423600
423200
564800
ESBK-1
SWSBK-1
424000
423600
564400
SBK-39
SBK-24
SBK-41
SBK-53
SBK-50
SBK-31
564000
1000m
563600
SBK-61
SBK-10
SBK-1
SBK-29
SBK-49
SBK-42
SBK-4
SBK-33
1000m
563600
SWSBK-2
424400
424000
800
800
SBK-17
SBK-28
SBK-2
SBK-40
SBK-26
SBK-23
SBK-7
SBK-9
SBK-19
SBK-54
SBK-56
SBK-60
SBK-15
SBK-16A
SBK-62
SBK-63
SBK-5
SBK-6
SBK-52
SBK-27
SBK-18
SBK-38
SWSBK-3 SBK-46
SBK-30
SBK-34
SBK-47
SBK-44
SBK-51
ESBK-2
SWSBK-1
SBK-45
562800
566000
SBK-61
SBK-39
SBK-24
SBK-41
600
1:19531
563200
SBK-20
SBK-17
ESBK-1
424800
424400
SBK-36
SBK-32
565600
SBK-11
SBK-57
SBK-55
SBK-10
SBK-1
425200
424800
SBK-35
SBK-37
565200
SBK-25
425600
425200
600
1:19531
563200
426000
425600
SWSBK-2
SBK-50
400
SBK-28
SBK-7
SBK-9
SBK-19
SBK-54
SBK-29
SBK-49
SBK-42
SBK-4
SBK-33
200
SBK-8
SBK-21
SBK-13
SBK-22
SBK-2
SBK-40
SBK-26
SBK-23
SBK-55
SBK-56
SBK-53
SBK-43
564800
SBK-3
426400
426000
SBK-11
SBK-57
SBK-60
SBK-15
SBK-48
0
564400
427600
426400
ESBK-1
SBK-16A
SBK-62
SBK-63
SBK-5
SBK-6
SBK-52
SBK-27
SBK-18
SBK-38
SWSBK-3 SBK-46
SBK-30
SBK-34
SBK-47
SBK-44
SBK-51
ESBK-2
562800
564000
SBK-14
SBK-61
SBK-10
SBK-1
SWSBK-1
SBK-45
563600
400
SBK-20
SBK-17
SBK-28
SBK-2
SBK-40
SBK-39
SBK-24
SBK-41
SBK-53
563200
426800
426800
SWSBK-2
562800
SBK-58
SBK-25
SBK-13
SBK-22
200
562800
HIGH
COMPARTEMENTALIZATIO
N
427200
427200
SBK-58
SBK-8
SBK-21
0
566000
SBK-59
SBK-12
SBK-3
SBK-14
SBK-61
SBK-7
SBK-9
SBK-19
SBK-54
565600
427600
427600
SBK-17
SBK-26
SBK-23
SBK-55
565200
423200
428000
SBK-11
SBK-57
564800
LOW
COMPARTEMENTALIZATIO
N
566000
423600
565600
424000
565200
SBK-31
564400
SBK-20
SBK-25
SBK-43
SBK-50
1000m
564000
424400
564800
800
563600
424800
564400
600
1:19531
425200
564000
SBK-20
SBK-56
400
563200
SBK-36
SBK-32
SBK-48
566000
SBK-59
SBK-12
SBK-3
SBK-58
SBK-13
SBK-22
200
425600
563600
SBK-59
SBK-12
SBK-14
SBK-8
SBK-21
0
426000
565600
426400
563200
426800
562800
427200
565200
SBK-35
SBK-37
SBK-33
SBK-43
MEDIUM
COMPARTEMENTALIZATIO
N
565600
427600
565200
564800
SBK-29
SBK-49
SBK-42
SBK-4
SBK-45
LOW
COMPARTEMENTALIZATIO
N
CONNECTED GEOMETRY
OF SAND
LESS EXPECTED OF NEW
POOL SAND RESERVOIR
428000
564800
SBK-35
SBK-36
SBK-32
423200
564400
564400
ESBK-1
SBK-60
SBK-15
SBK-16A
SBK-62
SBK-63
SBK-5
SBK-6
SBK-52
SBK-27
SBK-18
SBK-38
SWSBK-3 SBK-46
SBK-30
SBK-34
SBK-47
SBK-44
SBK-51
ESBK-2
SWSBK-1
SBK-29
SBK-37
SBK-48
423600
564000
SBK-31
564000
SBK-10
SBK-1
SBK-39
SBK-24
SBK-41
SBK-50
1000m
563600
424000
563600
800
SBK-26
SBK-23
SBK-53
SBK-18
SBK-38
SBK-30
SBK-34
SBK-44
ESBK-2
SBK-49
SBK-42
SBK-4
SBK-45
SBK-28
SBK-2
SBK-40
SBK-7
SBK-9
SBK-19
SBK-54
SBK-56
SWSBK-2
424400
563200
600
1:19531
563200
HIGH
COMPARTEMENTALIZATIO
N
562800
400
566000
SBK-11
SBK-57
SBK-55
ESBK-1
424800
200
425200
0
562800
566000
425600
565600
426000
565200
565600
SBK-61
SBK-46
SBK-51SBK-47
562800
564800
426400
564400
426800
SBK-43
565200
SBK-25
SBK-17
SBK-60
SBK-15
SBK-33
423200
423200
SBK-31
564000
SBK-36
SBK-32
564800
SBK-3
SBK-8
SBK-21
SBK-13
SBK-22
SBK-16A
SBK-62
SBK-63
SBK-5
SBK-6
SWSBK-1
SBK-50
1000m
563600
SBK-37
423600
423600
800
SBK-35
424000
424000
600
1:19531
563200
424400
424400
400
SBK-29
SBK-48
SBK-50
200
564400
SBK-20
SBK-10
SBK-1
SBK-39
SBK-24
SBK-41
SBK-52
SBK-27
SWSBK-3
SBK-18
SBK-38
SBK-30
SBK-34
SBK-44
ESBK-2
SBK-49
SBK-42
SBK-4
SBK-33
SBK-43
564000
SBK-14
SBK-28
SBK-7
SBK-9
SBK-19
SBK-54
SBK-56
SWSBK-2
424800
424800
SBK-36
SBK-32
SBK-48
0
SBK-6
SBK-46
SBK-51SBK-47
SBK-45
563600
SBK-59
SBK-12
SBK-2
SBK-40
SBK-26
SBK-23
SBK-55
425200
425200
SBK-37
SBK-33
562800
425600
425600
SBK-45
SBK-35
ESBK-1
SBK-53
SBK-52
SBK-27
SWSBK-3
SBK-29
SBK-49
SBK-42
SBK-4
563200
SBK-58
SBK-11
SBK-57
SBK-60
SBK-15
SBK-16A
SBK-62
SBK-63
SBK-5
SWSBK-1
562800
566000
SBK-61
SBK-10
SBK-1
SBK-39
SBK-24
SBK-41
565600
SBK-25
SBK-17
SBK-2
SBK-40
SBK-26
SBK-23
565200
SBK-3
SBK-8
SBK-21
SBK-13
SBK-22
SBK-28
SBK-7
SBK-9
SBK-19
SBK-54
SWSBK-2
SBK-53
SBK-18
SBK-38
SBK-30
SBK-34
SBK-44
ESBK-2
SBK-46
SBK-51SBK-47
SBK-25
SBK-11
SBK-57
SBK-55
SBK-56
564800
SBK-58
426000
426000
ESBK-1
SBK-60
SBK-15
SBK-52
SBK-27
SWSBK-3
564400
SBK-14
SBK-61
SBK-10
SBK-1
SBK-16A
SBK-62
SBK-63
SBK-5
SBK-6
SWSBK-1
564000
SBK-20
SBK-17
SBK-2
SBK-40
SBK-39
SBK-24
SBK-41
563600
427200
SBK-8
SBK-21
SBK-61
SBK-7
SBK-9
SBK-19
SBK-54
SBK-53
563200
SBK-59
SBK-12
SBK-3
SBK-14
SBK-13
SBK-22
SBK-28
SBK-26
SBK-23
SBK-55
SWSBK-2
562800
426400
426400
SBK-11
SBK-57
SBK-17
SBK-56
566000
SBK-20
SBK-25
SBK-13
SBK-22
565600
SBK-58
SBK-20
SBK-8
SBK-21
565200
426800
426800
SBK-3
SBK-58
564800
SBK-59
SBK-12
SBK-59
SBK-12
SBK-14
564400
427600
427600
564000
427200
427200
563600
427600
427200
426800
563200
427600
566000
427200
565600
426800
565200
426400
564800
428000
564400
428000
564000
HIGH
COMPARTEMENTALIZATIO
N
428000
563600
428000
563200
428000
562800
562800
LOW
COMPARTEMENTALIZATIO
N
MEDIUM
COMPARTEMENTALIZATIO
N
427600
3rd ORDER REGRESSIVE STACKING
HIGH
COMPARTEMENTALIZATIO
N
428000
3rd ORDER TRANSGRESSIVE STACKING
GEOLOGICAL FACT OF SEMBAKUNG AREA
SBK-31
563600
564000
564400
564800
565200
565600
566000
STATISTIC FREQUENCY OF PERFORATED OIL
ZONE
50
40
47
40
30
31 30 30
28
20
26 24
23 25
18 17 18 15
10 10 3 0 2 1 2 3 4
9 10 15 10 11 12 8 9 9 8 9
0
16 17B 19AB 20 21BC 23 24CD 26A 26CD 27B 28B 29B 30A 30CD 32AB 33 35
HIGH
COMPARTEMENTALIZATION
PRODUCT
STRATIGRAPHIC
TRAP
DOMAIN
GEOLOGICAL FACT OF SEMBAKUNG AREA (STRATIGRAPHIC TRAP DOMAIN)
562800
563200
563600
564000
564400
564800
565200
565600
-3500
SBK-44
SBK-32
SBK-43
0
-350
423200
425920
425840
425360
0
-3
50
422800
SBK-19
1:21938
564400
564800
565200
565600
220 m
B
-3500
00
-25
SBK-9
SBK-10
425200
425200
564000
322 m
425120
425120
563600
425280
A
563200
SBK-16A
425040
425040
562800
425360
1000m
SBK-40
425440
800
422800
600
0
400
423200
-350
200
A
425440
423600
423600
SBK-36
SBK-33
SBK-2
425520
SBK-4
SBK-48
SBK-35
SBK-37
425520
SBK-29
424000
0
SBK-42
SBK-49
SBK-61
-4000
-3500
-400
SBK-45
SBK-34
SBK-30
425600
SBK-38
ESBK-2
SBK-46
SBK-47
425600
SWSBK-3
SBK-6
424400
424400
SBK-18
SBK-5
SBK-51
ESBK-1
SBK-62
SBK-63
SBK-27
SBK-52
0
B
SBK-17
425680
0
SBK-16A
SBK-41
SWSBK-1
-30
0
SBK-15
424800
424800
SBK-10
425280
00
-3500
-3 0
0
SBK-24
SBK-41
50
SBK-62
100
150
200
250m
1:4601
SBK-63
564080
564160
564240
564320
564400
564480
564560
564640
424960
0
424960
426800
426400
00
SBK-9
425680
-3
00
425200
SBK-19
SBK-54
425760
SBK-2
SBK-40
SBK-7
SBK-53
SBK-57
425760
SBK-28
SBK-26
SBK-55
SWSBK-2
564640
SBK-57
SBK-17
SBK-61
425600
425600
426000
426000
SBK-25
SBK-22
-3 5
425200
0
SBK-20
SBK-21
SBK-13
SBK-20
564560
564480
425840
00
SBK-11
SBK-8
564400
426400
-3
SBK-14
564320
425920
426800
SBK-12
SBK-58
564240
SBK-25
SBK-59
SBK-23
424000
QOI > 1000
QOI = 500 - 1000
QOI = 200 - 500
QOI < 200
00
-3 0
564160
427200
427200
564080
SWEETNESS ATTRIBUTE DISTRIBUTION OF HIGH COMPARTEMENTALISATION PARASEQUENCES SET
566000
427600
427200
426800
426400
430400
429600
426000
428800
427200
425600
425200
424800
428000
424400
426400
424000
423600
423200
425600
422400
421600
2500m
420800
425200
424800
424400
424000
423600
423200
425600
424800
423200
424000
427200
426800
426400
426000
420000
561600
562400
563200
564000
564800
565600
566400
567200
400
600
800
1000m
SBK-31
563200
563600
564000
564400
564800
565200
565600
HIGH
COMPARTEMENTALIZATION
RESTRICTED GEOMETRY OF
SAND
HIGHER OIL POTENTION
MORE EXPECTED OF NEW
POOL SAND RESERVOIR
430400
563200
563600
564000
564400
SBK-59
SBK-12
SBK-3
SBK-58
426000
428800
425600
425200
424800
428000
427200
SBK-24
SBK-41
SBK-53
SBK-10
SBK-1
SBK-29
SBK-49
SBK-42
SBK-4
SBK-35
SBK-37
423600
426400
423200
425600
500
1000
1500
2000
2500m
1:44000
420800
420000
560800
561600
562400
563200
564000
564800
565600
566400
567200
568000
SBK-36
SBK-32
SBK-48
SBK-43
SBK-50
200
400
600
800
1000m
1:19531
424800
424000
423200
0
ESBK-1
SBK-60
SBK-15
SBK-16A
SBK-62
SBK-63
SBK-5
SBK-6
SBK-52
SBK-27
SBK-18
SBK-38
SWSBK-3 SBK-46
SBK-30
SBK-34
SBK-47
SBK-44
SBK-51
ESBK-2
0
421600
HIGH
COMPARTEMENTALIZATION
RESTRICTED GEOMETRY OF
SAND
HIGHER OIL POTENTION
MORE EXPECTED OF NEW
POOL SAND RESERVOIR
422400
566000
421600
565600
420800
565200
420000
425200
424800
423600
423200
424400
425600
428800
426400
425600
424800
424000
423200
422400
564800
422400
421600
564400
423200
420800
564000
424000
420000
420000
1000m
SBK-31
563600
SBK-28
SBK-2
SBK-40
SBK-39
SBK-45
424800
420800
568000
800
SWSBK-2
SWSBK-1
425600
421600
567200
600
SBK-56
426400
422400
566400
563200
423200
423200
565600
423600
424000
564800
400
SBK-17
SBK-26
SBK-23
SBK-7
SBK-9
SBK-19
SBK-54
SBK-33
SBK-50
200
1:19531
424800
564000
SBK-36
SBK-32
SBK-43
562800
SBK-11
SBK-57
SBK-13
SBK-22
424000
SBK-37
SBK-25
SBK-61
424000
SBK-35
6300
5400
4500
3600
2700
1800
900
0
427200
SBK-29
SBK-49
SBK-42
SBK-4
SBK-48
0
425600
563200
424400
424400
SBK-60
SBK-15
SBK-16A
SBK-62
SBK-63
SBK-5
SBK-6
SBK-52
SBK-27
SBK-18
SBK-38
SWSBK-3 SBK-46
SBK-30
SBK-34
SBK-47
SBK-44
SBK-51
ESBK-2
SWSBK-1
SBK-45
2500m
ESBK-1
424800
424000
SBK-39
SBK-24
SBK-41
SBK-53
426400
562400
Surface attribute
428000
SWSBK-2
SBK-8
SBK-21
SBK-55
SBK-10
SBK-1
425200
428000
SBK-2
SBK-40
SBK-7
SBK-9
SBK-19
SBK-54
427200
427200
SBK-28
425600
428000
3rd ORDER GENETIC SEQUENCE (A)
428800
SBK-17
SBK-26
SBK-23
SBK-55
565600
SBK-14
428800
SBK-11
SBK-57
SBK-13
SBK-22
SBK-56
565200
SBK-20
SBK-25
426000
426000
SBK-8
SBK-21
564800
426800
426400
427200
426800
562800
429600
SBK-58
SBK-61
1:44000
561600
566000
430400
SBK-3
426400
426400
560800
426800
429600
SWEETNESS DISTRIBUTION
MF_2 – FS_2.1 PARASEQUNCE
Hor 5_3300-3700
SET 564800 565600 566400 567200 568000
561600
562400
563200
564000
566000
SBK-14
SBK-33
560800
565600
428000
564400
SBK-59
SBK-12
429600
5250
4500
3750
3000
2250
1500
750
0
2000
565200
427600
564000
427200
563600
427600
563200
427200
430400
562800
430400
Surface attribute
1500
564800
568000
429600
428800
428000
427200
426400
425600
424800
424000
423200
422400
421600
420800
420000
200
423200
3rd ORDER GENETIC SEQUENCE (B)
SBK-50
0
562800
SBK-20
1000
SBK-36
SBK-32
423600
560800
427600
SWEETNESS DISTRIBUTION FS_2.3 – MF_3 PARASEQUNCE
Copy of Hor 6_2200-2700
SET 564800 565600 566400 567200 568000
561600
562400
563200
564000
500
SBK-37
SBK-43
568000
560800
0
SBK-35
424000
2000
424400
1500
1:44000
424800
1000
425200
567200
425600
566400
426000
565600
SBK-29
SBK-49
SBK-42
SBK-4
SBK-45
420000
564800
500
420800
564000
426400
0
ESBK-1
SBK-60
SBK-15
1:19531
421600
563200
426800
566000
420000
562400
427200
565600
422400
420800
561600
427600
565200
423200
421600
560800
428000
564800
424000
2500m
SBK-10
SBK-1
SBK-16A
SBK-62
SBK-63
SBK-5
SBK-6
SBK-52
SBK-27
SBK-18
SBK-38
SWSBK-3 SBK-46
SBK-30
SBK-34
SBK-44
SBK-51SBK-47
ESBK-2
SBK-48
424800
564400
SBK-39
SBK-24
SBK-41
SWSBK-1
425600
422400
2000
SBK-31
564000
HIGH
COMPARTEMENTALIZATION
RESTRICTED GEOMETRY OF
SAND
HIGHER OIL POTENTION
MORE EXPECTED OF NEW
POOL SAND RESERVOIR
423200
1500
1:44000
1000m
563600
SBK-56
426400
424000
1000
800
SBK-61
SBK-7
SBK-9
SBK-19
SBK-54
427200
424800
500
600
1:19531
563200
423200
400
SBK-28
SBK-2
SBK-40
SBK-26
SBK-23
SBK-55
SBK-53
423600
200
SBK-3
SWSBK-2
424000
425600
SBK-50
0
562800
566000
SBK-20
SBK-33
SBK-43
565600
SBK-11
SBK-57
SBK-36
SBK-32
SBK-48
565200
SBK-25
SBK-13
SBK-22
SBK-17
424400
426400
SBK-35
SBK-37
SBK-33
0
424800
427200
SBK-29
SBK-49
SBK-42
SBK-4
SBK-45
564800
SBK-59
SBK-12
SBK-8
SBK-21
428000
ESBK-1
SBK-60
SBK-15
SBK-16A
SBK-62
SBK-63
SBK-5
SBK-6
SBK-52
SBK-27
SBK-18
SBK-38
SWSBK-3 SBK-46
SBK-30
SBK-34
SBK-47
SBK-44
SBK-51
ESBK-2
SWSBK-1
564400
SBK-14
428800
SBK-39
SBK-24
SBK-41
SBK-53
SBK-10
SBK-1
425200
SWSBK-2
4800
4200
3600
3000
2400
1800
1200
600
0
425600
SBK-56
Surface attribute
SBK-28
SBK-2
SBK-40
SBK-61
SBK-7
SBK-9
SBK-19
SBK-54
564000
429600
SBK-17
SBK-26
SBK-23
SBK-55
563600
SBK-58
426000
6400
5600
4800
4000
3200
2400
1600
800
0
SBK-11
SBK-57
SBK-13
SBK-22
563200
430400
SBK-3
SBK-20
SBK-25
562800
426400
SBK-59
SBK-12
SBK-58
Surface attribute
SWEETNESS DISTRIBUTION
MF_3 – FS_3.1 PARASEQUNCE
Hor 6_2000-2250
SET 564800 565600 566400 567200 568000
561600
562400
563200
564000
560800
428000
565600
427600
565200
428000
564800
426800
430400
564400
427200
429600
564000
SBK-8
SBK-21
428000
3rd ORDER REGRESSIVE STACKING
563600
SBK-14
428800
3rd ORDER TRANSGRESSIVE STACKING
563200
429600
3rd ORDER REGRESSIVE STACKING
562800
427600
SWEETNESS DISTRIBUTIONHor
FS_3.3
7 – MF_4 PARASEQUNCE
SET 564800 565600 566400 567200 568000
561600
562400
563200
564000
560800
428000
THIRD ORDER
GENETIC SEQUENCE
430400
3rd ORDER TRANSGRESSIVE STACKING
SWEETNESS ATTRIBUTE MAP CREATED BY TRI HANDAYANI
562800
563200
SBK-31
563600
564000
564400
564800
565200
565600
HIGH
COMPARTEMENTALIZATION
RESTRICTED GEOMETRY OF
SAND
HIGHER OIL POTENTION
MORE EXPECTED OF NEW
POOL SAND RESERVOIR
DRILLING AND DEVELOPMENT STRATEGY
SWEETNESS DISTRIBUTION MF_3 – FS_3.1 PARASEQUNCE
Hor 6_2000-2250
SET 564800 565600 566400 567200 568000
561600
562400
563200
564000
SWEETNESS DISTRIBUTION
FS_3.3
Hor
7 – MF_4 PARASEQUNCE
561600
562400
563200
564000 SET564800
565600
566400
567200
568000
428000
427200
426400
425600
429600
429600
426400
425600
425600
424000
423200
422400
424800
424800
424000
423200
422400
SWEETNESS DISTRIBUTION
FS_2.3
– MF_3 PARASEQUNCE
Copy of Hor
6_2200-2700
SET 564800 565600 566400 567200
561600
562400
563200
564000
563200
564000
564800
565600
566400
567200
568000
Surface attribute
428000
427200
426400
425600
425600
425600
424800
424800
424800
564000
564800
565600
566400
567200
568000
421600
2000
2500m
420800
420000
420800
420000
563200
1500
1:44000
420000
420000
562400
1000
420800
420800
561600
500
421600
1:44000
560800
422400
427200
424000
423200
422400
0
2500m
421600
421600
2000
422400
1500
423200
422400
1000
424000
423200
500
427200
424000
424000
426400
425600
423200
426400
426400
428000
427200
0
428000
428000
6300
5400
4500
3600
2700
1800
900
0
424800
429600
428800
428800
429600
429600
562400
430400
428800
5250
4500
3750
3000
2250
1500
750
0
561600
POTENTIAL ZONE TO DRILL AND
TO DEVELOPE
SWEETNESS DISTRIBUTION MF_2 – FS_2.1 PARASEQUNCE
Hor 5_3300-3700
SET564800 565600 566400 567200 568000
561600
562400
563200
564000
429600
Surface attribute
2500m
560800
430400
428800
421600
420800
560800
568000
430400
560800
568000
2000
430400
567200
420000
420800
420000
566400
1500
1:44000
420000
565600
1000
420800
564800
500
421600
421600
422400
564000
420000
563200
420800
562400
423200
0
421600
561600
EXISTING PRODUCTION ZONE
424000
2500m
1:44000
560800
422400
2000
423200
1500
424000
1000
424800
424800
500
427200
427200
426400
426400
0
428000
427200
4800
4200
3600
3000
2400
1800
1200
600
0
425600
428800
428800
428800
429600
Surface attribute
428000
428000
430400
428800
6400
5600
4800
4000
3200
2400
1600
800
0
429600
Surface attribute
430400
560800
430400
430400
560800
560800
561600
562400
563200
564000
564800
565600
566400
567200
568000
SEMBAKUNG FIELD
DEVELOPMENT STRATTEGY :
GRID BASE DRILLING STRATEGY ON THE
POTENTIAL AREA DUE TO HIGH
COMPARTEMENTALIZATION OF SAND RESERVOIR
PRESENTATION OUTLINE
1
BASIC OPEN HOLE LOG INTERPRETATION OVERVIEW
2
SHARING - SHARING
3
WORKSHOP
GENETIC SEQUENCE
THIRD ORDER
GENETIC SEQUENCE
FOURTH ORDER
GENETIC SEQUENCE
DELTAIC CYCLE
TERIMA
KASIH