MANAGING MATURE FIELDS IN PERTAMINA EP - NORWEP · Pertamina EP Operation Area ASSET 1 Field...
Transcript of MANAGING MATURE FIELDS IN PERTAMINA EP - NORWEP · Pertamina EP Operation Area ASSET 1 Field...
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MANAGING MATURE FIELDS IN PERTAMINA EP
Jakarta, April 6th, 2017 Andi W. Bachtiar VP Enhanced Oil Recovery Pertamina EP
Pertamina EP Operation Area
ASSET 1
Field
Operation Area Geographic
1. Field Rantau Aceh
2. Field Pangkalan Susu
North Sumatera
3. Field Lirik Riau
4. Field Jambi Jambi
5. Field Ramba South Sumatera
Unitisation
Operation Area Operator
Tanjung Pertamina EP
Suban Conoco Philips (Grissik) Ltd.
ASSET 2
Field
Operation Area Geographic
1. Field Prabumulih South Sumatera
2. Field Pendopo South Sumatera
3. Field Limau South Sumatera
4. Field ADERA South Sumatera
Project
Operation Area Geographic
PP Gas Pakugajah South Sumatera
Unitisation
Operation Area Operator
Air Serdang JOB Pertamina – Talisman Ogan
Komering
ASSET 3
Field
Operation Area Geographic
1. Field Subang West java
2. Field Jatibarang West java
3. Field Tambun West java
Project
Operation Area Geographic
PP Pondok Makmur West java
Unitisation
Operation Area Operator
MB Unit PHE ONWJ
ASSET 4
Field
Operation Area Geographic
1. Field Cepu Central –East Java
2. Field Poleng East Java
3. Field Matindok Central Sulawesi
Project
Operation Area Geographic
PP Gas Jawa Central Java
PP Gas Matindok Central Sulawesi
Unitisation
Operation Area Operator
Jambaran-Tiung Biru
PEPC
Sukowati JOB Pertamina – Petrochina East Java
ASSET 5
Field
Operation Area Geographic
1. Field Sangatta East Kalimantan
2. Field Bunyu East Kalimantan
3. Field Tanjung South Kalimantan
4. Field Sangasanga East Kalimantan
5. Field Tarakan East Kalimantan
6. Field Papua West Papua
Unitisation
Operation Area Operator
Wakamuk Petrogas (Basin) Ltd.
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Historical Production
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Bor
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WI
Eksisting+Kondensat
2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016
101.258 109.633 116.620 127.137 129.955 124.999 127.635 121.513 117.030 100.558
83.672
2440
89108113108
86807482
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● Jumlah Sumur Bor
Jumlah Sumur Bor
Sukowati
Tambun ph.2
BN-18
Niru, Sukowati,
Sangasanga
Limau, Sukowati,
Bunyu
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Challenged in Mature Fields
• Declining oil production and reservoir pressure
• High Liquid Production Surface Facility Capacity & reliability, more injection wells
• Need more artificial lift need more power capacity
• Scale up problem starts from wellbore into Gathering Station Stimulation, scale inhibitor
• More sand problem occured, more well intervention activities
• Need more chemicals for liquid processing demulsifier, scale inhibitor, corrossion inhibitor
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Managing Mature Fields
Managing Strategy to Increase Production
Infill Drilling Outstep Drilling Workover and
Well Intervention Waterflood &
EOR Surface Facility
Reliability
Need More :
Surface Facility Capacity
(Tanks, Power, Pumps, Separation System etc)
Injection Wells Chemicals needed for liquid
processing (demulsifier, scale & corrosion inhibitor)
Mature Field : More Liquid Production
(Water Cut > 90%)
Less Oil Production
(Declining) High Operation Cost
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Managing Mature Fields
1. INFILL DRILLING
- Hydrocarbon recovery acceleration.
- New opportunity by looking at low resistivity and thin layer reservoirs.
- Grid base approach for deltaic environment
- Appliication of advanced drilling techniques : UBD, Horizontal Drilling
2. OUTSTEP DRILLING
- New opportunity to increase production and reserves replacement ratio.
- New seismic and well data acquisition.
- GGRP Studies.
- New layers found from drilling activities, new well log data, GGRP studies.
- New opportunity by looking at low resistivity layer, thin layer reservoirs, tight reservoirs.
- Fracturing & well stimulation.
3. WORKOVER / WELL INTERVENTION
- Secondary Recovery /Waterflood : Studies, Pilot & full scale waterflood at selected fields.
- Tertiary Recovery : Laboratorium Studies, GGRP Study, Field Trial and Pilot at selected fields.
4. EOR / SECONDARY AND TERTIARY RECOVERY
183 Active structures:
- Most of it has been produced before 1970
- RF Current 26%
- Np/EUR > 70%
ARE MANAGED THROUGH.....
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Success Story : Sangasanga
Reactivation of Suspended Wells
Only 10% from 3100 drilled wells are active wells, either as producers or injectors.
In period 2009 – 2012, 209 wells were reactivated with 34% success ratio.
Lifting Optimization
Lifting optimization through re-sizing SRP from capacity of 200-400 Bfpd into 800-1000 Bfpd.
Lifting optimization contributes the most production gain compares to other well intervention activities.
Development Drilling
Drilling program is made based on recoverable reserves and available space and phase implementation.
Subsurface at East Kalimantan area is commonly deltaic reservoir that has both opportunities & risks with 70% success ratio.
Sustainable Production
NIIHM (Nederlandsch-Indische
Industrie en Handel Maatschppij)
BPM (Batavia Petroleum Maatschppij) 1905-1942
Japan 1942-1945
BPM/Shell/Permina/Pertamina 1945-1972
TIPCO - Tesoro 1972-1992
PTEN - Medco E&P 1992-2008
Pertamina EP 2008-Now
1897-1905
Results: Maintain and also increase
production (sustainable) 101-138%
Infill & step out drilling give additional reserves as much as 11.1 MMBO
History of Sangasanga Block
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Well Intervention
Main productive layers in Limau especially Niru and Limau Barat are W, X and Y series
Reopening upper series such as R and S series which has been suspended
Lifting Optimization
Optimize Lifting method using ESP and SRP.
Development Drilling
GGR remodelling with new approach of stratigraphic sequences Outstep drilling, discovered new pool North side of Niru, new
Layer at Limau Barat
Horizontal Drilling implementation to optimize oil recovery
Results: Increase production from
5.895 BOPD to 11.200 BOPD
Infill & step out drilling results in additional reserves 212 MMBO
History of Limau Block 1943 Discovered by BPM
1989-1998 JOB Husky
1998 - 2005 JOB Sea Union
2005 - now PEP
Thousand, bopd
Success Story : Limau
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• Development Drilling
Based on newly acquired 3D seismic interpretation and GGR re-modelling new
pool discovery at PB series layer of GRM.
Curently 20 infill and step out wells have been drilled to develop oil and gas reserves in PB Series layer
Multi layer completion to save rig cost and strive for efficiency in operation.
Workover & Well Intervention
67 workovers dan well interventions were executed in 2010 to 2017, mostly in PB series layer to optimize oil & gas production.
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PMB-31PMB-32
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PMB-P20 usul 2
PMB-P23 geser surface
PMB-P23 target rev
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-2450411200 411600 412000 412400 412800 413200 413600 414000 414400 414800 415200 415600 416000
411200 411600 412000 412400 412800 413200 413600 414000 414400 414800 415200 415600 416000
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Results: Increase production from 238
BOPD and 5 MMscfd into 957 BOPD and 36 MMscfd
Infill & step out drilling results in additional reserves 4.6 MMBO and 66 BSCF
Success Story : Prabumulih Barat
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• Development Drilling & Workover
Drilling Results:
17 production wells and 11 Injection wells
Workover & well intervention Results:
20 production wells and 4 injection wells
7 waterflood patterns have been developed at layer Z600
Upgrade and repair production and injection facilities: Gathering Station, Water Treatment Plant / Water Injection Plant
Results: Increase oil production
from 500 BOPD into 1500 BOPD
Secondary WF PEP Phase is currently resulting in additional oil cumulative production of 2.3 MMBO from total additional reserves target of 20.32 MMBO
History of Production and Injection Rantau Z600
Oil Cum
(MMBBL)RF (%)
Oil Cum
(MMBBL)RF (%)
Oil Cum
(MMBBL)RF (%)
A1 15.7 3.77 24% 0.0 0.0% 0.6 3.9%
A2 10.6 3.57 34% 0.0 0.0% 0.8 7.7%
B 7.8 2.98 38% 0.0 0.0% 0.0 0.5%
C1 18.7 7.18 38% 0.0 0.0% 0.5 2.9%
C2 10.4 2.40 23% 0.7 7.0% 0.0 0.2%
D1 9.2 1.39 15% 0.6 7.0% 0.0 0.2%
D2 13.9 3.73 27% 0.9 6.4% 0.1 0.7%
D3 10.3 1.96 19% 0.9 8.6% 0.0 0.1%
D4 16.7 2.79 17% 0.4 2.7% 0.1 0.6%
E 15.7 0.26 2% 0.0 0.0% 0.0 0.0%
Total 129.0 30.02 23% 3.6 2.8% 2.3 1.8%
BLOKOOIP
(MMSTB)
Primary Phase
Secondary
JAPEX Phase
Secondary
PEP Phase
Success Story : Rantau Waterflood
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Water Treatment Injection Plant
Rantau
WTIP Facility Rantau Before and After Development
Submanifold SP 3 Facility Before and After Development
Production History & Forecast
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