Transcript Document

WP4: Assessing capacity for CO2 storage
in selected regions of China
Jonathan Pearce
23rd October 2008
Outline
•
Introduction to WP4
•
Objectives
•
Regional studies
•
Site assessments
•
Outputs
WP4 Partners
China
UK
•
British Geological Survey
(BGS)
•
China University of Petroleum (CUP) – Beijing and
Huadong
•
BP
•
Institute of Geology and Geophysics, Chinese Academy
of Sciences (CAS)
•
Heriot Watt University
•
China United Coalbed Methane Co Ltd (CUCBM)
•
Jilin Oilfield
•
PetroChina
•
Shell
WP4: Storage Options
• Objectives:
– Build capacity in China for evaluating storage potential and
performing appropriate first stage site characterisation for
site selection.
– Estimate the future potential for CO2 storage.
– Mapping of CO2 sources and potential sinks will be carried
out.
• Tasks:
– Regional basin assessments of storage potential for EOR,
ECBM and saline formations
– Site-selection and assessments for demonstration of
storage.
– GIS-based decision support tool will be developed.
Storage Options
•
Saline formations
– Songliao Basin
•
As part of enhanced oil recovery operations
– Songliao Basin (Jilin and Daqing oilfields)
– Subei Basin (onshore only,
Jiangsu oilfield)
•
As part of enhanced coalbed methane
production
– Qinshui Basin
WP4 Progress
•
WP4 launch meeting in January 2008
– Agreed timetable for project
– Agreed basins for assessment
•
Basin methodologies workshop in May 2008
– Agreed methodologies for regional basin assessments
– Reviewed initial results for all regions
•
Basin Assessment Conference in July 2008
– Joint meeting with COACH and GeoCapacity
– Reviews of preliminary results for all current projects estimating storage
capacities in China.
•
Interim report completed August 2008
Daqing Oil Field
discovered in 1959
Jilin Oil Field
discovered in 1959
Daqing oilfield estimated capacities
Note: No net to gross ratio
applied
CSLF effective
capacity (Mt)
Oil field
2%
10%
Lamadian
11
22
109
149
Sa’ertu
16
31
157
226
5
10
50
72
Gaotaizi
0.1
0.1
0.6
1
Taipingtun
0.3
0.6
2.6
4
Putaohua
0.4
0.5
4.4
6
Aobaota
0.1
2.6
0.7
1
total
32
65
324
459
Xingshugang
1CUP
1%
Field-specific
estimate1 (Mt)
methodology - Assumes volumetric replacement for oil
and dissolution in both oil and formation water
Jillin Oilfields estimated capacities
Note: No net to gross ratio applied
CSLF effective capacity (Mt)
Oil field
0.02
0.10
Hongang
0.30
0.60
3.00
3.7
Xinli
0.63
1.25
6.25
8.2
Mutou
0.19
0.39
1.95
2.7
Qian’an
1.35
2.70
13.50
18.4
Yingtai
1.09
2.18
10.92
14.9
4
7
36
47.9
totals
1CUP
0.01
Field-specific
estimate1
(Mt)
methodology - Assumes volumetric replacement for oil
and dissolution in both oil and formation water
Binhai Uplift
Troughs
Yanfu
⑨
Depression
⑦
⑧
② Gaoyou
③ Qintong
⑥
Jianhu Uplift
① Jinhu
④ Hai'an
⑤ Baiju
⑩
⑥ Yancheng
⑤
⑦ Funing
①
②
Dongtai
Depression
③
④
⑧ Liannan
⑨ Lianbei
⑩ Hongze
Caoshe Oilfield
--Oilfield
Assessment results
•
108 oil reservoirs of Jiangsu Oilfield have been assessed.
– Total CO2 storage potential is 20.4614 Mt .
•
75 reservoirs are suitable for CO2 EOR.
– Calculation assumes CO2 trapping during EOR process only
– Storage capacity of 15.76 Mt during the EOR process
•
33 reservoirs are suitable for CO2 storage.
– Based on volume of recoverable reserves
– Storage capacity of 4.70 Mt
Stratum of Songliao Basin
well1
well3
well2
K2n
K2y
K2qn
K2q
main saline aquifer:
Qingshankou Fm
The stratigraphic sequences are dominated by Cretaceous fluvial and
lacustrine strata with volcanic and volcaniclastic rocks.
5 hydrostratigraphic units classified from bottom to top:
JD, K2q, K2qn, K2y, K2n
Effective storage capacity
of Deep saline aquifers in Songliao Basin
 Songliao Basin (260,000 km2)
 Average height 380m
 Average reservoir porosity 10%
 CO2 density at reservoir conditions 700 kg/m3
 Total regional effective storage capacity:
Note: No net to gross ratio applied
CSLF effective capacity (Mt)
1%
69160
2%
138320
10%
691600
(Storage coefficient of 1–2–10% applied)
Next steps…
•
Finalise basin reports
•
Site assessments and reports
•
Recommended sites for feasibility studies in Phase 2
Conclusions
•
Jilin, Daqing and Jiangsu oilfields offer variable potential for CO2
storage
– They provide some storage potential as niche opportunities for
CO2-EOR – especially in Jilin and Daqing
– Small pilot CO2-EOR projects are already being undertaken
– As such may provide incentives for a small-scale pilot
demonstration of CCS.
•
Theoretical calculations for a selected saline aquifer suggests that the
Qingshankou Formation could offer very large storage capacities
– However, this is based on very low data density (concentrated
around oilfields)
– Further primary data acquisition is necessary to refine this estimate.
– Comparisons with underlying reservoirs suggest specific field
geology likely to be equally complex.
Jonathan Pearce
British Geological Survey,
United Kingdom.
Email: [email protected]
Tel: +44 (0)115 9363222