Petroleum Science and Technology,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1 - 20
Published: Jan. 2, 2025
Coalbed
methane
wells
on
the
ground
in
coal
mining
areas
are
used
to
extract
a
large
amount
of
gas
from
working
face,
but
activities
can
cause
strata
movement,
resulting
casing
deformation.
Numerical
simulation
was
study
shear
stress
loading
under
thick
alluvial
conditions.
The
found
that
will
have
peak
points
at
interface
between
aquifer,
layer
and
bedrock,
mudstone
with
intensity
49.9–77.1
MPa.
point
aquifer
appear
4
m
below
floor
as
face
is
mined.
junction
bedrock
increases
linearly
depth,
appears
just
above
junction.
section
fluctuates
periodically
lithology
changes,
mostly
weak
rock
formations
such
mudstone.
introduction
non-uniform
theory
explains
reasons
for
deformation
these
layers,
proposes
suggestions
control.
This
provide
reference
formulation
control
methods.
ADVANCES IN GEO-ENERGY RESEARCH,
Journal Year:
2024,
Volume and Issue:
12(3), P. 205 - 222
Published: May 15, 2024
CO2/N2-enhanced
coalbed
methane
recovery
is
an
important
means
of
increasing
production,
and
understanding
the
competitive
adsorption
CO2,
CH4
N2
in
coalbeds
its
impact
on
coal
properties
important.
A
structural
model
for
anthracite
from
Daning-Jixian
was
constructed
based
elemental
analyses,
Fourier
transform
infrared
spectroscopy,
X-ray
photoelectron
spectroscopy
carbon
nuclear
magnetic
resonance
data.
The
grand
canonical
Monte
Carlo
method
used
to
research
multiple
gases
changes
porosity
permeability.
These
results
indicated
that
with
CO2
injection,
considerable
desorption
occurred
seams,
permeability
decreased.
During
increased,
increased
gradually.
However,
rate
after
injection
much
lower
than
CO2.
With
as
molar
mass
ratio
quantity
adsorbed
decreased,
total
amount
gas
which
coal.
At
0.6,
70.95%,
were
high,
sequestered
mitigate
greenhouse
emissions
provide
economic
environmental
benefits.
Document
Type:
Original
article
Cited
as:
Pan,
J.,
Jiao,
F.,
Wang,
K.,
Li,
Y.,
Song,
D.,
Hou,
Q.
Molecular
simulations
effects
adsorption,
Advances
Geo-Energy
Research,
2024,
12(3):
205-222.
https://doi.org/10.46690/ager.2024.06.05
Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(3), P. 1618 - 1632
Published: Jan. 9, 2024
With
the
growing
global
demand
for
clean
energy,
more
and
attention
has
been
given
to
energy
conversion
efficiency
of
low-quality
fuels.
A
solid
oxide
fuel
cell
(SOFC)
is
expected
be
one
ideal
technologies
efficient
utilization
low-concentration
coalbed
methane
(CBM)
because
it
can
achieve
This
review
examines
challenges
SOFC
technology
fueled
by
CBM.
In
comparison
fuels
such
as
hydrogen
natural
gas,
CBM
usually
contains
a
large
number
other
gas
components
in
addition
methane,
which
reduces
chemical
reactivity
leads
decrease
efficiency.
The
effects
different
carbon-containing
on
performance
have
investigated
great
deal
research,
results
reveal
that
tends
main
source
carbon
deposition,
whereas
oxygen-containing
positive
effect
deposition.
current
hydrocarbon
fuels,
concentration
polarization
also
major
factor
contributing
lack
durability
stability
cell,
with
exception
deposition
sulfur
poisoning.
addition,
temperature
operating
environments
degrees
influence
Therefore,
development
materials
optimization
system
structure
CBM-fueled
are
still
key
research
directions
future.
Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(5), P. 3517 - 3538
Published: Feb. 14, 2024
Enhanced
coal
seam
methane
extraction
by
injecting
gas
is
an
emerging
technology
to
both
reduce
greenhouse
emissions
and
improve
recovery.
In
this
paper,
the
experimental
field
research
progress
on
injection
for
driving
displacing
are
reviewed
from
perspectives
of
micro,
meso,
macro
scales.
The
microscopic
scale
perspective
involves
intuitively
analyzing
interaction
process
relationship
between
strong
adsorption
gases
(CO2,
LCO2,
SCCO2)
relatively
weak
(CH4,
N2)
injected
into
samples,
changes
in
number
micropores,
mesopores,
macropores
samples
using
NMR
low-temperature
nitrogen
equipment,
visualizing
multiphase
flow
pore
structures
microfluidic
methods.
For
mesoscopic
scale,
multiple
equipment
means
(SEM,
NMR,
liquid
adsorption,
etc.)
were
used
quantitatively
analyze
effects
different
fracture
widths,
degrees
metamorphism,
composition
seepage
adsorption–desorption
rate.
macroscopic
physical
mechanical
properties
rock
analyzed
pseudotriaxial
or
true
triaxial
during
parameters
axial
pressure
confining
pressure,
especially
related
experiments
single
component
multicomponent
gases.
Moreover,
future
perspectives,
some
key,
emerging,
intelligent
technologies
enhanced
will
be
put
forward.
