PRSS Technology Forum 2002

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PRSS Technology Forum - 2002
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PRSS Technology Forum
16-17th September 2002, Kuantan

BAYAN 3-D Modeling by Mohd Ismail Omar

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Objective of Presentation

• Present Forum Participants with the Bayan 3-D
  modeling Workflow and Benefits

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Presentation Outline

• Team Structure
• Geological Setting
• Data Preparation Workflow
• Property 3D (Geostatistics) Simulation
• S2.2/S2.6 Example (static modeling)
• S3.4/S3.8 Example (static modeling)
• S4.5 Example (including reservoir simulation)
• Benefits

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Project Team Structure
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Stratigraphic Summary
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Paleoenvironment Map

• Sarawak Basin (Ref Shell, 1986b)

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Geographical Setting
Eurasian Plate
The Geographical Setting of SE Asia During the
Miocene (Hall, 1995)
Pacific Plate
Strike-Slip Movement Along Fault
Indian Plate
Sarawak Basin
Borneo with NW-SE Coastline
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Bayan Location Map
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Bayan Geological Model
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Data Preparation Process Flow
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Well Markers Correlation - Geology
Depth TVD
Cycle II Correlation Panel West Bayan (SW-NE)
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Well Markers Correlation - Seismic
Seismic Density Display illustrating Reverse
Faults
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Well Markers Correlation - Seismic
Seismic Density Display illustrating Coal Markers
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Bayan Structural Framework
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Sedimentology Facies
Bayan 107 ( 5615.4 5627.4 ft)
(Conglomorate)
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Sedimentology Facies
Bayan 2 (Bayan-3) - 5027.0 5047.1 ft
(Massive Sandstone)
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Sedimentology Facies
Bayan 8 (4847.8 4862.4ft)
(Muddy Sandstone)
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Sedimentology Facies
Bayan 8 4653.1 4668.3 ft
(Mudstone Sandy Mudstone)
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Sedimentology Facies
Bayan 5 (4147.0 4163.0 ft)
Coal between 4147.0 4151.5ft
(Coal)
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Identify Litho-Facies from Well Logs
Litho-facies input
Litho-facies output
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Facies Nomenclature (Rock Cell Core)
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Facies Comparison with Core
S7 Unit Bayan 8
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Facies Comparison with Core
S6 Unit Bayan 8
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Facies Comparison with Core
S5 Units Bayan 2
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Energy Classification
B) Medium Energy Facies
S4 Neutron/Density Cross-Plots of the Sandstone
Facies
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Well Log Statistics
West Bayan S4 Porosity Distribution By Facies
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Facies Analogue
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Property 3D Fluvial Simulation
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Control Parameters for Fluvial Simulation

• Litho-Facies at Well Bore
• Channel Statistics
• width/thickness ratios, wavelength, amplitude
• Global Proportion Curves
• Vertical Proportion Curves
• Areal property maps (seismic attributes) soft
  control

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S2.2/S2.6 Example
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S2 Vertical Proportion Curves
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S2 - Effective Porosity Histograms
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S2 Layer 15 Realisation 8
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S2 Layer 40 Realisation 8
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S2 Lithology Section I 105 Realistion 8
B
A
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S3.4/S3.8 Example
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S3.4/S3.8 Vertical Proportion Curves
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S3 Attribute Input
S3 Unit Integrated Reflection Strength Seismic
Amplitude Map
S3 Unit Net Reservoir Porosity Mapped
Using Collocated Cokriging
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S3.4/S3.8 Effective Porosity Histograms
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S3.4/S3.8 Layer 15 Realisation 5
Porosity
Lithology
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S3.4/S3.8 Layer 55 Realisation 5
Porosity
Lithology
A
B
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S3.4/S3.8 Lithology Cross Section I 80 Realistion
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B
A
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S4.5 Example
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S4.5 Vertical Proportion Curves
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S4.5 Attribute Input
S4 Unit Integrated Seismic Amplitude Map
S4 Unit Net Reservoir Porosity Mapped
Using Collocated Cokriging
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S4.5 Effective Porosity Histograms
Medium Energy Facies
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S4.5 Layer 25 Realisation 10
Lithology
Porosity
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S4.5 Layer 60 Realisation 10
Porosity
Lithology
A
B
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S4.5 Lithology Cross Section I 90 Realistion 10
B
A
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Geological to Reservoir Simulation Scale

• 1,420,000 to 142,000 cells

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Engineering Data Integration
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Simulation Model Construction
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Simulation Model Construction
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Typical Well Performance
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Model Prediction
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Model Prediction
Bypassed Oil
Bypassed Oil
Bypassed Oil
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Benefits

• A robust 3D geostatistical model which
  categorises uncertainty in modelling the channel
  in coastal plain environment .
• Infill wells identified in S4.5 reservoir
  generate some 6 MMstb of oil.

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• THANK YOU