International Petroleum Technology Conference,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 17, 2025
Abstract
The
role
of
hydrogen
geo-storage
and
production
in
addressing
global
warming
energy
demand
concurrently
cannot
be
understated.
Diverse
factors
such
as
interfacial
tension
(IFT)
wettability
influence
safe
effective
production.
IFT
controls
the
maximum
H2
storage
column
height,
capacity,
capillary
entry
pressure.
Current
laboratory
experimental
techniques
for
determination
H2/cushion
gas
systems
are
resource-intensive.
Nonetheless,
extensive
data
supports
machine
learning
(ML)
deployment
to
determine
time-efficiently
cost-effectively.
Hence,
this
work
evaluated
predictive
capabilities
supervised
ML
paradigms
including
random
forest,
extra
trees
regression,
gradient
boosting
regression
(GBR),
light
machine,
wherein
novelty
study
lies.
An
comprehensive
dataset
comprising
2564
instances
was
gathered
from
literature,
encompassing
independent
variables:
pressure
0.10–45
MPa),
temperature
(20–176
°C),
brine
salinity
(0–20
mol/kg),
hydrogen,
methane,
carbon
dioxide,
nitrogen
mole
fractions
(0-100
mol.%).
pre-processed
split
into
70%
model
training
30%
testing.
Statistical
metrics
visual
representations
were
utilized
quantitative
qualitative
assessments
models.
Leverage
approach
subsequently
applied
classify
different
categories
verify
statistical
validity
database
reliability
constructed
paradigms.
impact
variables
on
prediction
using
Spearman
correlation,
permutation
importance,
Shapley
Additive
Explanations
(SHAP).
Nitrogen
CO2
demonstrated
least
greatest
gas/brine
based
correlation
analysis,
SHAP.
Generally,
developed
successfully
captured
underlying
relationships
between
IFT,
recording
an
overall
R2
>
0.97,
MAE
<
1.30
mN/m,
RMSE
2
AARD
2.3%
GBR
superior
performance,
yielding
highest
lowest
MAE,
RMSE,
0.987,
0.507
0.901
0.906%,
respectively.
also
provided
more
accurate
results
pure
H2/water
than
empirical
molecular
dynamics-based
correlations
by
other
scholars.
Only
0.43–2.11%
outside
range,
underscoring
beneficial
tools
toolbox
domain
experts,
which
could
fast-track
workflows
minimize
uncertainties
surrounding
conventional
aqueous
systems.
This
progress
is
promising
mitigating
loss
optimizing
strategies
Fuel,
Год журнала:
2024,
Номер
371, С. 131899 - 131899
Опубликована: Май 24, 2024
One
of
the
major
challenges
in
harnessing
energy
from
renewable
sources
like
wind
and
solar
is
their
intermittent
nature.
Energy
production
these
can
vary
based
on
weather
conditions
time
day,
making
it
essential
to
store
surplus
for
later
use
when
there
a
shortfall.
storage
systems
play
crucial
role
addressing
this
intermittency
issue
ensuring
stable
reliable
supply.
Green
hydrogen,
sourced
renewables,
emerges
as
promising
solution
meet
rising
demand
sustainable
energy,
depletion
fossil
fuels
environmental
crises.
In
present
study,
underground
hydrogen
various
geological
formations
(aquifers,
depleted
hydrocarbon
reservoirs,
salt
caverns)
examined,
emphasizing
need
detailed
analysis
potential
hazards.
The
paper
discusses
associated
with
storage,
including
requirement
extensive
studies
understand
interactions
microorganisms.
It
underscores
importance
issue,
focus
reviewing
past
projects
sites,
well
modeling
field.
also
emphasizes
incorporating
hybrid
into
overcome
limitations
standalone
systems.
further
explores
future
integrations
green
within
dynamic
landscape.
International Journal of Hydrogen Energy,
Год журнала:
2024,
Номер
59, С. 1352 - 1366
Опубликована: Фев. 15, 2024
Underground
hydrogen
storage
(UHS)
is
gaining
interest
as
a
secure,
long-term
solution
for
storing
in
porous
geological
formations.
In
UHS,
cushion
gas
like
CO2
crucial
to
maintain
the
reservoir
pressure
and
optimize
recovery.
The
concept
of
wettability
plays
fundamental
role
determining
system's
multi-phase
displacement
characteristics
media.
However,
there
gap
existing
literature
regarding
sandstone
rocks
under
geo-storage
conditions
when
H2
are
injected
bulk
gases,
respectively.
To
address
this
gap,
we
conducted
study
investigating
hysteresis
phenomenon
by
measuring
advancing
receding
contact
angles
different
mixtures
H2/CO2
with
brine
on
mineral
pressures
temperatures,
using
tilted
plate
method.
results
show
that
angle
increases
pressure,
leading
system
become
less
water-wet.
Conversely,
an
increase
temperature
makes
more
Moreover,
measured
remains
relatively
constant
despite
changes
concentration.
Further
analyses
utilizing
atomic
force
microscope
(AFM)
energy
dispersive
X-ray
spectroscopy
(EDS)
indicated
chemical
physical
structure
rock
does
not
change
after
exposure
CO2,
consistent
observed
lack
varying
fraction.
conclusion,
water-wet
state
identified
decreases
residual
trapping
H2,
facilitating
higher
recovery
but
posing
potential
risk
leakage.
Hence,
fraction
favorable
reducing
decreasing
IFT
and,
subsequently,
column.
This
improves
our
understanding
mechanisms,
aiding
accurate
simulations
underground
systems.
International Journal of Hydrogen Energy,
Год журнала:
2023,
Номер
50, С. 19 - 35
Опубликована: Июль 12, 2023
Underground
Hydrogen
Storage
(UHS)
in
porous
media
appears
to
be
a
promising
means
for
large-scale
hydrogen
storage,
underpinning
the
full-scale
of
supply
chain
development.
Hydrogen-brine-rock
interactions
play
an
important
role
conversion
and
contamination
during
cycling
process.
While
redox
reaction
triggered
by
injected
H2
pre-existing
O2
is
unique
UHS
compared
other
types
gas
subsurface
few
research
have
been
done
understand
reactions
solubility,
pH,
fewer
works
looked
beyond
its
process
on
contamination,
which
may
affect
stored
purity
storage
efficiency.
In
this
context,
we
examined
hydrogen-brine-minerals
(e.g.,
calcite,
siderite,
quartz
pyrite)
as
function
dissolved
oxygen
concentration
(from
5.5
5500
ppm),
temperature,
pressure
through
geochemical
modelling
using
solver
PHREEQC.
Our
results
showed
that
increasing
from
ppm
resulted
negligible
impact
solubility
pH
all
tested
minerals.
As
sensitive
minerals,
siderite
calcite
can
react
with
process,
leading
up
certain
loss
at
20
MPa,
respectively.
Meanwhile,
pyrite
are
insensitive
minerals
hydrogen,
causing
less
than
0.2%
same
condition.
indicate
mineral
oxidation
due
formation
brine
played
H2-brine-rock
interactions.
The
also
carbonate
such
act
electron
acceptors,
dissociation
thus
formed
strong
reduction
environment
based
PHREEQC
database.
This
likely
causes
measurable
associated
abiotic
lifetime
underground
operation.
Taken
together,
suggest
clean
standstone
reservoirs
will
signifcantly
reduce
perspective.
