Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 4, 2024
There
is
increasing
interest
in
attainment
of
a
CO2-free
global
economy
and
net
zero
carbon
emissions
by
2050
to
mitigate
the
negative
impact
warming
unfavorable
climate
change.
However,
success
large-scale
underground
H2
CO2
storage
depends
on
rock
wetting
behavior
dynamics
gas/brine
interfacial
tension
(IFT),
which
significantly
influences
capillary
pressure.
Previous
studies
have
demonstrated
that
wettability
can
be
altered
into
hydrophilic
state
using
surface-active
chemicals
such
as
surfactants,
nanoparticles,
methyl
orange,
blue.
these
also
showed
higher
propensity
reduce
IFT,
for
residual
structural
trapping
potential
host
rock.
Herein,
limestone
modification
capacity
polymeric
surfactant
(chitosan
salt)
its
impacts
CO2/brine
H2/brine
IFT
were
evaluated
pendant
drop
technique
pressure
measurement.
Results
shifted
right
presence
chitosan
salt
solutions,
indicating
reduction
needed
push
water
pore
spaces
This
effect
increased
with
concentrations
solution
from
100
1000
ppm.
Specifically,
at
200
psi,
saturation
seawater-saturated
cores
about
50
70%
whereas
deionized
water-saturated
25
40%
ppm
concentration.
The
CO2/water
interface
H2/water
no
significant
effects
tension.
Moreover,
adsorption
DI
seawater
molecules
was
salt,
suggesting
promotes
adhesion
H2O
but
discourages
Our
results
generally
modify
hydrophobic
rocks,
turning
them
wet
while
mitigating
could
increase
Hence,
geo-storage
rocks
promising
strategy
derisking
optimizing
formations.
Energy Science & Engineering,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 1, 2024
ABSTRACT
Salt
cavern
gas
storage
is
an
important
technical
means
to
balance
the
demand
for
staggered
energy
supply.
Due
repeated
injection
and
extraction
of
natural
in
facilities,
sealing
integrity
failure
wellbore
facilities
frequently
occurs.
In
response
this,
considering
cyclic
loading
unloading
pressure
load
inside
casing,
mechanical
tests
set
cement
were
carried
out
under
alternating
loads,
quantifying
cumulative
plastic
strain
change
law
revealing
deterioration
characteristics
its
properties.
A
numerical
model
casing
sheath
formation
was
established
based
on
obtained
experimental
parameters.
Comparative
verification
conducted
using
data,
variation
analyzed.
The
distribution
bonding
surface
entire
quantified.
research
results
indicate
that
higher
internal
value
earlier
appears,
with
increase
number
increases
approximately
linearly.
After
increased
by
30
MPa,
a
maximum
46.75%.
When
cycles
loads
small,
reducing
elastic
modulus
(6
GPa)
can
effectively
reduce
strain.
However,
as
exceeds
specific
value,
produced
high
(15
sheaths
decreases.
Finally,
pattern
along
different
times
complex
conditions
Suggestions
establishing
well
barriers
salt
during
cementing
proposed.
provide
theoretical
engineering
references
evaluating
wells.
Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 4, 2024
There
is
increasing
interest
in
attainment
of
a
CO2-free
global
economy
and
net
zero
carbon
emissions
by
2050
to
mitigate
the
negative
impact
warming
unfavorable
climate
change.
However,
success
large-scale
underground
H2
CO2
storage
depends
on
rock
wetting
behavior
dynamics
gas/brine
interfacial
tension
(IFT),
which
significantly
influences
capillary
pressure.
Previous
studies
have
demonstrated
that
wettability
can
be
altered
into
hydrophilic
state
using
surface-active
chemicals
such
as
surfactants,
nanoparticles,
methyl
orange,
blue.
these
also
showed
higher
propensity
reduce
IFT,
for
residual
structural
trapping
potential
host
rock.
Herein,
limestone
modification
capacity
polymeric
surfactant
(chitosan
salt)
its
impacts
CO2/brine
H2/brine
IFT
were
evaluated
pendant
drop
technique
pressure
measurement.
Results
shifted
right
presence
chitosan
salt
solutions,
indicating
reduction
needed
push
water
pore
spaces
This
effect
increased
with
concentrations
solution
from
100
1000
ppm.
Specifically,
at
200
psi,
saturation
seawater-saturated
cores
about
50
70%
whereas
deionized
water-saturated
25
40%
ppm
concentration.
The
CO2/water
interface
H2/water
no
significant
effects
tension.
Moreover,
adsorption
DI
seawater
molecules
was
salt,
suggesting
promotes
adhesion
H2O
but
discourages
Our
results
generally
modify
hydrophobic
rocks,
turning
them
wet
while
mitigating
could
increase
Hence,
geo-storage
rocks
promising
strategy
derisking
optimizing
formations.