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Malaysia Team:
Azhar Yusof
M Razali Che Kob M Farizanuddin Jaapar
Noor Farinda Salim *Khairil Azhar Ghazali
Petroleum Management Unit, PETRONAS
CCOP EPPM P1W6 :
North Sumatra – Mergui Basin Case Study : Project Progress
4th – 7th September 2012 Labuan, Malaysia
PresenterPresentation NotesAssalamualaikum and a very good morning to all of you.Today, I am Khairil Azhar on behalf of Petronas Malaysia would like have a presentation on the updates of North Sumatra – Mergui basin case study.
Team team member consists of farizanuddin, noor farinda, me myself and led by Mr Razali. And our General Manager, Mr Azhar is our Team Advisor.
Presentation Outline q
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PresenterPresentation NotesThis is my presentation outline. Before all, I will a have a short brief for study background.
Secondly, I will show you our project progress on well corre, chrono, seismic facies analysis & mapping
EPPM P1 Basin Analysis Workflow
BASIN SCALE
Basin Evolution History (Basin Evolution Evaluation)
Regional Structural Trends (Structural Trend Analysis)
Basin Architecture (Regional Structural Mapping)
Petroleum System (Petroleum System Analysis)
PLAY SCALE
Chronostratigraphy (Sequence Stratigraphy
Analysis)
Paleogeography (Seismic Facies Analysis)
Play-types Identification (Play Assessment and Risking)
PresenterPresentation NotesThe slide shown the EPPM Basin Analysis workflow that has been generated during early CCOP workshop. The workflow will go from regional to play scale .
At the moment we are at the final stage which is PLAY-TYPES IDENTIFICATION ( PLAY ASSESSMENT AND RISKING)
Assignment
• Indonesia - 2D basin modeling and structure identification • Thailand - Construct schematic structural cross section - Back-stripping of each horizon • Malaysia - Well correlation - Chronostratigraphic chart - Seismic facies mapping - Common risk segment (CRS) map
PresenterPresentation NotesThis slide shown the list of tasks that has been agreed previously by this 3 country members. Indonesia is responsible for on 2D basin + structure
Thailand assignment is to construct schematic structural cross section & back-stripping exercise
Malaysia done well correlation, chrono, CRS, and Seismic facies mapping
Study Area and Data set
Study Area
International Boundary
W9 -C -1
SIKAO-1
SINGA BESAR -1
NSB C-1 GPM -1
LANGGUN TIMUR -1 PM320
PM320
Indonesia Malaysia
Thailand
• Exploration Wells – Singa Besar-1
(Malaysia) – Langgun Timur-1
(Malaysia) – NSB C-1
(Indonesia) – GPM-1
(Indonesia) – W9C-1 (Thailand) – Sikao-1
(Thailand) Seismic Lines:
Indonesia 12 seismic lines Thailand 4 seismic lines Malaysia 2 seismic lines
PresenterPresentation NotesThis is the study area located between Thailand, Indonesia and Malaysia. In this study, we use 6 well data and 18 2D seismic lines.
Previous Results 1. Correlation of Wells:
– Singa Besar-1 – Sikao-1 – W9C-1 (Malaysia-Thailand) – Langgun Timur-1 – NSBC-1 – GPM-1 (Malaysia-Indonesia)
2. Chronostratigraphic chart across Malaysia, Thailand and Indonesia
3. Seismic Facies Map: – Two (2) seismic facies map – Top Upper Miocene
Keutapang/Thalang and Top Middle Miocene Baong/Trang Formations that covers Indonesia & Thailand
– Geoseismic sections
4. Common Risk Segment (CRS) map for Upper Miocene Keutapang/Thalang and Top Middle Miocene Baong/Trang Formations
PresenterPresentation NotesWe has completed 2 well correlations and chronostratigraphic. We have done some revision on seismic facies map and CRS
Stratigraphic Correlation : Malaysia - Thailand ThailandThailand Singa Besar-1 Sikao-1 W9-C-1
9 5/8’
13 3/8’
9 5/8’
20’
Zone NN11
Zone NN12
20’
13 3/8’
Top Keutapang/Thalang
61 km 173 km
Malaysia Thailand
Top Basement
Top Basement
W9C-1
Sikao-1
Singa Besar-1
60 km
Legend :
Sandstone Siltstone Mudstone
Limestone
Dolomite
Casing shoe
Conglomerate
Volcanic/ Metamorphic
SE NW
PresenterPresentation NotesThis well correlation is from southern to northern part. between W9C1, Sikao-1 and Singa Besar well. Two well penetrated up to basement comprise of volcanic/metamorphic rock.
The conglomerate at the half-graben and basin centre indicate the early phase of rifting.
Carbonates growth in the basement horst and shelf margin
Baong and Keutapang sediments thickening to the basinal indicate the sediment supply is coming from Malaysian side.
Langgun Timur-1 NSBC-1 GPM-1 195 km E W 60 km
Terminated at Seabed
Top Peutu SB
SB
13 3/8’
9 5/8’
20’
Malaysia Indonesia
Legend :
Sandstone Siltstone Mudstone
Limestone
Dolomite
Casing shoe
Conglomerate
Volcanic/ Metamorphic
GPM-1 NSBC-1
60 km
Langgun Timur-1
Stratigraphic Correlation : Malaysia - Indonesia
NSBC-1
Langgun Timur-1
60 km
GPM-1
PresenterPresentation NotesThis is the well correlation from Eastern to Western part. This represent North Sumatra Basin cross section. So, we can see the source sediment is come from the both side Eastern and Western part. Carbonate basement at LT-1 well
SOUTHEAST NORTHWEST
PLEISTOCENE
LATE OLIGOCENE
LATE MIOCENE
MIDDLE MIOCENE
EARLY MIOCENE
EARLY OLIGOCENE
LATE PLIOCENE
EARLY PLIOCENE
W9C-1 SIKAO-1 SINGA BESAR-1 GLOBAL
SEA LEVEL
200 -100 N S
UM
ATRA
BAS
IN
EQU
IVAL
ENT
JULU RAYEU
SEU
RULA
BA
ON
G
BELU
MAI
/ PE
UTU
SY
NRI
FT/
BAM
PO
AGE
IN M
A
NP23
NP24
NP25
NN1
NN2
NN3
NN4
NN5
NN6
NN7
NN8
NN9 NN10
NN11
NN12
NN13 & Above
P21
P22
N4
N5
N6 N7
N8
N9 N10 N11
N12
N13
N14
N15
N16
N17
N18 & Above
FORA
M Z
ON
E
NN
ZO
NE
PERI
OD
/ EP
OCH
PRE-TERTIARY
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
SYNRIFT
NON-DEPOSITION/EROSION
NON-DEPOSITION/EROSION
KEUTAPANG/THALANG
BAONG/TRANG
SEURULA/TAKUA PA
PRE-TERTIARY BASEMENT
Chronostratigraphic Chart
PresenterPresentation NotesThis is the chronostratigraphic chart of seismic section from NW to SE. We generate this chronostratigraphic chart by integrating seismic section and well correlation.
During Oligocene to Early Miocene, the basin was filled by syn-rift sediment at depocentre and carbonates growth at the shelfal area.
In Middle Miocene, Baong sand is backstepping indicates sea level rise then in Upper miocene Keutapang formation, the sand is prograding due to the drop of sea level. Turbidite fan is found in basinal area.
Seurula has almost same thickness indicate quite environment.
EAST WEST
PLEISTOCENE
LATE OLIGOCENE
LATE MIOCENE
MIDDLE MIOCENE
EARLY MIOCENE
EARLY OLIGOCENE
LATE PLIOCENE
EARLY PLIOCENE
GPM-1 NSBC-1 LANGGUN TIMUR-1
SYNRIFT
BAONG/TRANG
PEU
TU
GLOBAL SEA LEVEL
200 -100
KEUTAPANG/THALANG
SEURULA/TAKUA PA
N S
UM
ATRA
BAS
IN
EQU
IVAL
ENT
JULU RAYEU
SEU
RULA
BA
ON
G
BELU
MAI
/ PE
UTU
SY
NRI
FT/
BAM
PO
AGE
IN M
A
NP23
NP24
NP25
NN1
NN2
NN3
NN4
NN5
NN6
NN7
NN8
NN9 NN10
NN11
NN12
NN13 & Above
P21
P22
N4
N5
N6 N7
N8
N9 N10 N11
N12
N13
N14
N15
N16
N17
N18 & Above
FORA
M Z
ON
E
NN
ZO
NE
PERI
OD
/ EP
OCH
PRE-TERTIARY
2
4
6
8
10
12
14
16
18
20
22
24
NON-DEPOSITION/EROSION
NON-DEPOSITION/EROSION
NON-DEPOSITION/EROSION
INDONESIA MALAYSIA
26
28
30
32
SYNRIFT SYNRIFT
PRE-TERTIARY BASEMENT
Chronostratigraphic Chart
PresenterPresentation NotesThis chronostratigraphy chart of seismic section is from West to East and stratigraphy scheme is same as described before.
We generate this chronostratigraphic chart by integrating seismic section and well correlation. For Keutapang formation, the sand is prograding due to the drop of sea level but for Baong formation, the sand is backstepping due to increasing of sea level. Carbonate basement at Langgun Timur-1
Facies Mapping Constructed Paleoenvironment maps for Baong/Trang and Keutapang/Thalang Formations using seismic facies analysis, structural maps and well information.
Seismic Facies Analysis
Top Synrift W9C-1
Sikao-1
Singa Besar-1
60 km
GPM-1 NSBC-1
Langgun Timur-1
W9-C-1 DMR95-102 DMR95-150
DMR95-125
E W 0
1000
5000
4000
3000
2000
0
1000
5000
4000
3000
2000
5894m
Top Upper Miocene
Top Synrift
PresenterPresentation NotesThis is one of seismic facies analysis. The line located in north study area. We differentiate this 6 facies by their specific seismic character.
For example High Amplitude Clinoform, High Amplitude Parallel, Low Amplitude chaotic and so on. For further info, you can refer to panel on the wall.
Seismic Facies Interpretaion
Top Synrift
W9C-1 Sikao-1
Singa Besar-1
60 km
GPM-1 NSBC-1
Langgun Timur-1
Colour Environment Interpretation
Coastal to Inner Neritic
Middle Neritic
Outer Neritic to Bathyal
LEGEND:
Carbonate
Erosional Surface
Paleo-environment Map of Middle Miocene Baong/Trang Formations
PresenterPresentation NotesThis slide show paleo-environment map of Middle Miocene Formation. The yellow color indicates coastal to inner neritic, blue area indicate middle neretic and purple indicate outer neretic to bathyal.
Colour Environment Interpretation
Coastal to Inner Neritic
Middle Neritic
Outer Neritic to Bathyal
LEGEND:
Carbonate
Erosional Surface
Paleo-environment Map of Upper Miocene Keutapang/Thalang Fms Formation
Potential Reservoir
1. Coastal sand 2. Shallow Marine (Carbonate & Clastics) 3. Slope Fan Turbidite
PresenterPresentation NotesFrom the both paleo-environment map, we could identify 3 potential reservoir in the study area.
First is coastal sand. Secondly, shallow clastic consist of carbonate and clastics. Third one is slope fan turbidites
Common Risk Segment (CRS) Mapping
The CRS maps were constructed using • Paleo-environment maps • Well data • Structural map • Structural Restoration • Results of Basin Modelling
PresenterPresentation NotesWe have generated CRS map using 1….2….3…Bla..bla…
CRS map for Source Rock
Colour Description
High Risk
Medium Risk
Low Risk
LEGEND:
PresenterPresentation NotesIs generated by refering to maturity window
CRS map for Reservoir
Colour Description
High Risk
Medium Risk
Low Risk
LEGEND:
PresenterPresentation NotesIs generated by referring to paleo-environment map
CRS Map for Seal
Colour Description
High Risk
Medium Risk
Low Risk
LEGEND:
PresenterPresentation NotesIs generated by integrating seismic facies analysis and paleo-environment map. For example, referring to paleo-environment map, sand-shale ratio
Colour Description
High Risk
Medium Risk
Low Risk
LEGEND:
Composite CRS Map
PresenterPresentation NotesWe overlaid previous three CRS map to produce Composite CRS. We could see high risk area in basinal area due to no apparent reservoir development.
Risking the Plays/Sub-Plays of Miocene Clastics (Baong/Keutapang) Using CCRS Map
The Plays are ranked as below: 1. Shallow Marine
(Carbonate & Clastics) 2. Coastal Sand 3. Slope Fan Turbidite
CCRS map
Paleo-env. Map Keutapang/ Thalang
Paleo-env. Map Keutapang/Trang
PresenterPresentation NotesFor the risking and ranking of the play/sub-plays of Upper and Middle Miocene, we integrate Composite CRS map with Paleo-env. Map.
The plays are ranked as below :
PLAY RISK WORKFLOW
Risking and Ranking of Plays
Identify Potential Plays
Gross Depositional Environment Map
Play Fairway & Common Risk Segment Maps
PresenterPresentation NotesThe previous exercise could be summarise in this play risk workflow.
We generate paleo-environment map. Then, identify potential plays. The next step is play fairways and CRS. And after all we do risking
Summary
Potential Play/Sub-Play for Baong and Keutapang are ranked as 1. Shallow Marine (Carbonate & Clastics) 2. Coastal Sand 3. Slope Fan Turbidite
CRS Maps indicate
• Risky source in the basin margin especially in Melaka Platform and Mergui Shelf in the eastern margin
• Reservoir developed in basin margin and proximal slope area. Towards the basin centre no apparent reservoir developed
• The seals rock occurred in the deeper part of the basin, and thin progressively toward the platform and shelf area
• Most part of the basin has been risked as having medium risk and the risky area identified in the basin centre area and less risky in basin margin area
The established play risk workflow can be applied for risking and ranking of
potential plays in the cross border area
Slide Number 1Slide Number 2EPPM P1 Basin Analysis WorkflowAssignmentSlide Number 5Slide Number 6Slide Number 7Slide Number 8Slide Number 10Slide Number 11Facies MappingSlide Number 13Seismic Facies InterpretaionSlide Number 15Slide Number 16Potential Reservoir Common Risk Segment (CRS) MappingCRS map for Source RockCRS map for ReservoirCRS Map for SealSlide Number 22Slide Number 23Slide Number 24SummarySlide Number 26