iea-eor aberdeen 17-12.10iea-eor.ptrc.ca/2010/assets/f1_slides.pdf4 - classification: internal...
Post on 29-Mar-2018
223 Views
Preview:
TRANSCRIPT
1 - Classification: Internal 2010-04-23
EOR in Statoil
IEA-EOR Aberdeen 20.10.10
Benedicte Kvalheim
2 - Classification: Internal 2010-04-23
Outline
• EOR definition in Statoil
• IOR/EOR challenges
• Focused methods in Statoil
• Enablers
3 - Classification: Internal 2010-04-23
Source:
Adressa.no
EOR perspective
4 - Classification: Internal 2010-04-23
IOR- EOR definition Extensive recovery “toolbox” used by Statoil
• Pressure depletion
• Water injection
• HC gas injection
• WAG and FAWAG
• MIOR
• CO2 injection
• Chemical methods
• Thermal methods
• Vertical wells
• Horizontal wells
• Multilateral wells
• TTRD wells
• DIACS wells
• ERD wells
• HPHT high-angle wells
.
WAGINJECTION A-11
PRODUCTIONA-10, A-13
NESS
ETIVE
RANNOCH
INJ. WATER WATER OIL GAS
msegim petek.ejj.flw
• Topside processing
• Sub sea separation
• Sub sea compression
• Down hole pumping
5 - Classification: Internal 2010-04-23
2,5 bill. Sm3
(= 15,7 bill. Bbl)
1 prc.point =
270 bill NOK
(45 bill. USD)
Visions for NCS – The Aam report
6 - Classification: Internal 2010-04-23
Source: NPD
IOR challenges for NCS
7 - Classification: Internal 2010-04-23
Source: Petoro
Costs increases more than expected:
•Increase in drilling cost
•Increase in operational cost
•Increase in modification costs
Planned shut-downRisk of earlier
shut-down
Production decreases faster than expected:
•Lack of reservoir understanding
•Reserves pr. well smaller than expected
•Too few production wells drilled pr.year
Planned
income from
production
Planned costs
IOR Challenges for NCS
8 - Classification: Internal 2010-04-238 - Classification: Internal (Restricted Distribution) 2010-07-06
Ultimate Recovery as a KPI in Statoil
0
200
400
600
Statfjord* Oseberg Gullfaks Troll Snorre
1986
1996
2008
2009
Expected recoverable oil
(million Sm3 oil)
*Norwegian share
Getting ever more oil out of the ground
9 - Classification: Internal 2010-04-239 - Classification: Internal (Restricted Distribution) 2010-07-06
Existing and new measures from AMAP 2010
10 - Classification: Internal 2010-04-23
Window of opportunities
• Oil field in late life – facing shut down
• EOR as an IOR enabler:
− 6% of Statoil’s IOR portfolio in 2010
• Focused technologies
• Deep diversion of water flooding
• Low salinity water flooding,
• Polymer assisted water flooding
• MEOR (microbial EOR)
• Environmental goals on no harmful discharge to sea
and limited emission to air
− Limit EOR to fields with PWRI
− R&D on “green” substitutes
Buoy loading Heidrun. Source: Statoil
11 - Classification: Internal 2010-04-23
IOR enablers - Water diversionMethods for Efficient Drainage
Improve the volumetric sweep efficiency
• Simulations show 2-7% increase in production
• Alternative to drilling of new wells into areas
with very uncertain flooding pattern
• Environmentally acceptable chemical system
Current activities:
• Design parameters for pilot
• Potential evaluation for chemical treatment
• Area by area
Implementation:
• Pilot on the Gullfaks in Q2 2011
12 - Classification: Internal 2010-04-2312 - Classification: Internal (Restricted Distribution) 2010-07-06
CO2 for EOR at NCS
• Challenges at the NCS:
− Large well spacing
− Very costly offshore modifications
− Extensive use of gas injection and water injection –> low residual saturations
− Contamination of sales gas
• Extensive CO2 injection studies for:
− Gullfaks
− Heidrun
− Grane
− Volve
− Oseberg Øst
− Brage
Modified from NPD Factmaps
TrollGullfaksStatfjord
Åsgard
Snøhvit
Oseberg
Grane
Snorre
Sleipner
Heidrun
Norne
SH experiences with CO2 and HC gas inj. – Fields evaluated of CO2 for
EOR
14 - Classification: Internal 2010-04-23
EOR methods – focused in Statoil
• Deep diversion methods
− BW, Silicate, LPS
• Low salinity water flooding
• Polymer assisted polymer flooding
• MIOR
15 - Classification: Internal 2010-04-23
Source: Dagblandet.no
The EOR road to success
16 - Classification: Internal 2010-04-23
EOR in Statoil
Benedicte Kvalheim
Head of IOR department
bekva@statoil.com, tel: +47 41 60 30 58
www.statoil.com
Thank you
top related