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R e la tiv e ra tin g last 3-5 years at present in 3-5 years - IGU

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IGU
GAZPROM
VNIIGAZ
Working Committee 2
UGS
UGS: Achievements and trends in the field of
technical efficiency, environment stability
and safety
Report Study Group 2.2 for the World Gas Conference
Dr. Alexander Grigoriev, VNIIGAZ
Dr. Sergey Khan, GAZPROM
Amsterdam 5-9 June 2006
ГАЗПРОМ
ВНИИГАЗ
UGS: Achievements
and trends
1
IGU 2006
GAZPROM
VNIIGAZ
Questionnaire analysis ?
basis for the study
Questions are grouped in 5 basic parts:
1.
General Aspects
2.
Reservoir
3.
Wells
4.
Surface Facilities
5.
Safety
ГАЗПРОМ
ВНИИГАЗ
UGS: Achievements
and trends
2
IGU 2006
GAZPROM
VNIIGAZ
Answers
20 answers from 15 countries
? Europe : Austria, Croatia, Czech, Denmark, Germany,
France, Italy, Netherlands, Romania, Russia, Spain,
Sweden,
? Asia : Japan
? America : Argentina, USA
ГАЗПРОМ
ВНИИГАЗ
UGS: Achievements
and trends
3
IGU 2006
1 General Aspects
1.1 Improvements carried out on
GAZPROM
VNIIGAZ
existing gas storages. Future trends
1
0.9
0.8
Relative rating
0.7
0.6
0.5
0.4
last 3-5 years
In 3-5 years
0.3
0.2
0.1
0
Increase
working
volume of
existing
facilities
ГАЗПРОМ
ВНИИГАЗ
Increase
delivery
capacity of
existing
facilities
Increase
Increase
Improve
Identify new Improve safety Improve
working
delivery
contractual opportunities performance environmental
volume by capacity by situation (offer for existing
performance
expansion
expansion new services / storage
(adding new (adding new conditions)
services
facilities)
facilities)
UGS: Achievements
and trends
4
IGU 2006
1 General Aspects
1.2 Techniques used to analyze the
Relative rating
GAZPROM
VNIIGAZ
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
performance of storage
last 3-5 years
at present
in 3-5 years
Cost target
setting and
monitoring
ГАЗПРОМ
ВНИИГАЗ
Benchmarking
3rd party
evaluation
Management
judgment
Key
performance
indicator
setting
UGS: Achievements
and trends
5
IGU 2006
1 General Aspects
1.3 The most significant drivers for
GAZPROM
VNIIGAZ
improvement
1
0.9
Relative rating
0.8
Opportunity to
earn storage
related revenue
0.7
0.6
last 3-5 years
at present
in 3-5 years
0.5
0.4
Service
quality
0.3
0.2
0.1
0
Costs
ГАЗПРОМ
ВНИИГАЗ
Public
acceptance
Legal
requirements
Market
considerations
Other
UGS: Achievements
and trends
6
IGU 2006
1 General Aspects
1.4 New techniques preferred
GAZPROM
VNIIGAZ
to use in future
The most significant new techniques:
CO2 sequestration
?
?
Storage in lined Hard Rock Caverns
?
Storage in abandoned Mines
Less significant new techniques:
?
Gas sorption into the solids
?
ГАЗПРОМ
ВНИИГАЗ
Storage as Gas Hydrates
UGS: Achievements
and trends
7
IGU 2006
2 Reservoir
GAZPROM
VNIIGAZ
2.1 Definition of layer characteristics
last 3-5 years
In future 3-5 years
2D-seismic
0.6
0.75
1.0
1
Reprocessing 2Dseismic
0.5
3D-seismic
0.58
4D-seismic (time
lapse seismic)
0.8
0.58
Seismic attribute
mapping
1.0
Re-interpretation
0.08
0.92
ГАЗПРОМ
ВНИИГАЗ
0.4
UGS: Achievements
and trends
8
IGU 2006
2 Reservoir
GAZPROM
VNIIGAZ
2.2 Determination of the limits for the
maximum working reservoir pressure
?Aquifer storage: maximum pressure is limited by
the need to keep the gas within the structure
?Salt cavern storage: maximum pressure is
determined by the max. pressure gradient 0.184
bar/m
?The maximum allowable pressure normally has to
be approved by authorities
ГАЗПРОМ
ВНИИГАЗ
UGS: Achievements
and trends
9
IGU 2006
2 Reservoir
2.3 The trends for maximal allowable
GAZPROM
VNIIGAZ
pressure gradient
?UGS in aquifer the most common value is up to 1.4
times higher than level of initial pressure
? In Oil&gas field value of pressure gradient in
almost 50% answers is equal to initial level. In
rest cases, it is allowable to have up to 1.2 times
more initial level
? In salt caverns average level allowable pressure
gradient is 0.18 ? 0.19 bar/m
ГАЗПРОМ
ВНИИГАЗ
UGS: Achievements
and trends
10
IGU 2006
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Relative rating
2 Reservoir
2.4 Type of reservoir modelling tools
GAZPROM
VNIIGAZ
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
last 3-5 years
In 3-5 years
ГАЗПРОМ
ВНИИГАЗ
UGS: Achievements
and trends
11
IGU 2006
ГАЗПРОМ
ВНИИГАЗ
Grounf level
monitoring
Ultrasonic volume
determinations for
caverns
Souring/bacteria
monitoring
Gas quality
monitoring
Humidity monitoring
Cased hole logging
Real time sand
production
monitoring
0.1
Full shift
0.2
Remote control
Permanent downhole
gauges
Real time well
performance
monitoring
Day shift operation
GAZPROM
VNIIGAZ
Automated gas
quality monitoring
Downhole video
surveillance
Well testing
Automated well
pressure/temperature
monitoring
Relative rating
2 Reservoir
2.5 Monitoring techniques used to improve
geological, technical, operational safety
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
last 3-5 years
at present
in 3-5 years
0
UGS: Achievements
and trends
12
IGU 2006
2 Reservoir
2.6 Technical measures implemented to
GAZPROM
VNIIGAZ
improve the performance of the storage
For all type of
UGS
For pore storages
For caverns
?Reduction of
pressure losses
?Fast change of
operational
mode
?Minimizing size
of cushion gas
?Sand control
techniques
? Stimulations for
skin/scale removal
?Measures used to
diminish water
influx
?Leaching of
new caverns
?Enlarge
existing
caverns
? Infill drilling
ГАЗПРОМ
ВНИИГАЗ
UGS: Achievements
and trends
13
IGU 2006
2 Reservoir
2.7 Measures implemented to improve the
GAZPROM
VNIIGAZ
leaching of caverns
? Enlarging existing caverns
? Leaching of lens shaped caverns in thinner
salt layers
? Networking of caverns
?
Sump sealing Re-use leaching brine
ГАЗПРОМ
ВНИИГАЗ
UGS: Achievements
and trends
14
IGU 2006
ГАЗПРОМ
ВНИИГАЗ
Laser drilling
Long reach drilling
Underbalanced drilling
Snubbing drilling
Coiled tubing drilling
Open hole completions
0.8
Multilateral wells
0.9
Larger well bores
1
Recompletion (larger size
tubulars)
GAZPROM
VNIIGAZ
Reentry
Extended reach wells
Horizontal wells
Conventional wells
Relative rating
3 Wells
3.1 Well concepts used in UGS
last 3-5 years
In 3-5 years
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
UGS: Achievements
and trends
15
IGU 2006
3 Wells
3.2 Problems in implementing new well
GAZPROM
VNIIGAZ
concepts
Two main problems:
? well bore damage
? cement bond quality
The less trouble problems:
? Hole stability
? Sand control
ГАЗПРОМ
ВНИИГАЗ
UGS: Achievements
and trends
16
IGU 2006
3 Wells
3.3 Techniques applied for well
GAZPROM
VNIIGAZ
completion concepts
1
0.9
0.8
Relative rating
0.7
0.6
0.5
0.4
last 3-5 years
In 3-5 years
0.3
0.2
0.1
0
Coated tubing
ГАЗПРОМ
ВНИИГАЗ
Gravel packs
technology
Sand screen
technology
Monobore
completion
Permanent
downhole
monitoring
UGS: Achievements
and trends
17
IGU 2006
3 Wells
3.4 Stimulation technologies used for
GAZPROM
VNIIGAZ
maintain and improve deliverability
The most prevalent stimulation technologies are:
?
Acidizing
?
Fresh water treatments
Among other technologies there was mentioned:
?
Fresh water wash to dissolve salt
?
?
?
Hydro blast to clean out well bore fill and scale
Fresh water jet washing
EDTA treatments
ГАЗПРОМ
ВНИИГАЗ
UGS: Achievements
and trends
18
IGU 2006
3 Wells
3.5 Methods using to ensure the integrity
GAZPROM
VNIIGAZ
of subsurface equipment
The most used method is:
? Annulus pressure monitoring
Remaining measures encountered with almost equal
frequency:
? Corrosion monitoring
? Cathode protection
? Annulus fluid level control
?Regular inspection program
Among other technologies there was mentioned:
? Injection of biocide into the annulus
?Investigating check values for Annulus fluid level control
? Microvertilog, D-mag log, Neutron and temperature logs for
corrosion monitoring
ГАЗПРОМ
ВНИИГАЗ
UGS: Achievements
and trends
19
IGU 2006
4 Surface Facilities
4.1 Techniques used to avoid hydrate
GAZPROM
VNIIGAZ
formation
In 3-5 years
at present
6%
6%
Methanol
inhibition
Glykol
inhibition
Heat tracing
29%
34%
37%
27%
Gas heating
Others
14%
ГАЗПРОМ
ВНИИГАЗ
12%
17%
18%
UGS: Achievements
and trends
20
IGU 2006
3 Wells
3.2 Problems in implementing new well
GAZPROM
VNIIGAZ
concepts
First two places occupied by:
? Cathode protection
? Wall thickness monitoring
Following three places occupied by:
? Material choice
? Chemical inhibitors
? Coating
ГАЗПРОМ
ВНИИГАЗ
UGS: Achievements
and trends
21
IGU 2006
4 Surface Facilities
GAZPROM
VNIIGAZ
4.3 Technology applied on gas treatment
and gas quality management
1
0.9
0.8
At present
In 3-5 years
Relative rating
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
Computer
assisted
optimisation
ГАЗПРОМ
ВНИИГАЗ
Utilization of
no glycol
dehydration
Mechanical
separation
Automation
Availability
Facility testing
Design
changes
UGS: Achievements
and trends
22
IGU 2006
4 Surface Facilities
GAZPROM
VNIIGAZ
4.4 Improvements carried out on
compression performance
1
0.9
At present
Relative rating
0.8
In 3-5 years
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
Optimization
of operation
conditions
ГАЗПРОМ
ВНИИГАЗ
Turbines
Use for power Use of regeneration compression
Withdrawal
expansion
New
technology
for
compressor
& engines
Heat
recovery
system
Adoption of
LoNOx
system
Others
UGS: Achievements
and trends
23
IGU 2006
5 Safety
GAZPROM
VNIIGAZ
5.1 Spectrum of technologies for safety
Safety studies and audits
Preventive technical installations
Subsurface safety valves
Diagnosis of critical operations
Enhanced monitoring
Best knowledge of the geological situation
Periodical gas inventory and control of cap rock
tightness
? Preventive maintains
?
?
?
?
?
?
?
? Accidence analyses
ГАЗПРОМ
ВНИИГАЗ
UGS: Achievements
and trends
24
IGU 2006
Conclusions
GAZPROM
VNIIGAZ
?The expansion of world gas demand will lead to a
continuous increasing of storage capacity in
future, and many new facilities will have to be
constructed to meet future needs
? The analysis of data shows that gas storage
technologies are being developed that allow the
efficiency of UGS creation and operation to be
enhanced and new market requirements to be met
ГАЗПРОМ
ВНИИГАЗ
UGS: Achievements
and trends
25
IGU 2006
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