Polymers,
Journal Year:
2024,
Volume and Issue:
16(15), P. 2191 - 2191
Published: Aug. 1, 2024
Since
reservoirs
with
permeability
less
than
10
mD
are
characterized
by
high
injection
difficulty,
high-pressure
drop
loss,
and
low
pore
throat
mobilization
during
the
water
drive
process,
CO2
is
often
used
for
development
in
actual
production
to
reduce
difficulty
carbon
emission
simultaneously.
However,
microfractures
usually
developed
low-permeability
reservoirs,
which
further
reduces
of
driving
medium.
At
same
time,
this
makes
injected
gas
flow
very
fast,
while
utilization
rate
low,
resulting
a
degree
recovery.
This
paper
conducted
series
studies
on
displacement
effect
CO2-soluble
foaming
systems
fractured
(the
core
matrix
about
0.25
mD).
For
two
blowing
agents
CG-1
CG-2,
effects
phase
state,
content,
oil
content
static
performance
were
first
investigated;
then,
more
effective
agent
was
preferred
replacement
experiments
according
results;
finally,
sealing
improving
recovery
fully
open
investigated
at
different
rates
concentrations,
parameters
optimized.
The
results
show
that
still
has
good
under
volume
various
contents
can
be
subsequent
experiments.
After
selecting
concentration,
cores
conditions
0.6
mL/min
2.80%.
In
conditions,
achieve
an
83.7%
blocking
improve
extraction
12.02%.
research
provide
data
support
application
core.
Capillarity,
Journal Year:
2024,
Volume and Issue:
12(2), P. 41 - 56
Published: June 10, 2024
Imbibition
and
huff-n-puff
injection
in
shale
reservoirs
can
significantly
enhance
oil
recovery
after
depletion.
To
clarify
the
microscopic
production
characteristics
mechanisms
across
different
pore
scales
during
imbibition
injection,
this
study
establishes
an
online
physical
simulation
method
that
integrates
using
nuclear
magnetic
resonance
conducts
a
series
of
analyses
under
systems.
The
dynamic
development
are
quantitatively
studied
from
aspects
residual
distribution.
results
show
occurrence
states
pores
be
categorized
into
three
types,
including
adsorption
as
predominant
type,
followed
by
percolation
migration
pore.
When
viewing
entire
process
comprehensively,
it
becomes
imperative
to
maximize
while
ensuring
degree
pores.
free
increases
with
amount
gradually
shifts
adsorbed
organic
matter-dominated
forms,
resulting
decreasing
recoverability.
Using
water-based
media
achieves
superior
effect
for
interlayered
clay,
whereas
CO2
effectively
improve
matter
through
mass
transfer,
leading
11.01%-23.54%
enhancement
recovery.
Leveraging
bridge
flow
conductivity
fractures,
fluid
displacement
carrying
emerges
pivotal
strategy
achieving
optimal
enhanced
Document
Type:
Original
article
Cited
as:
Wei,
J.,
Shang,
D.,
Zhao,
X.,
Zhou,
Yang,
Y.,
Du,
M.
Experimental
on
reservoir.
Capillarity,
2024,
12(2):
41-56.
https://doi.org/10.46690/capi.2024.08.02
Physics of Fluids,
Journal Year:
2024,
Volume and Issue:
36(7)
Published: July 1, 2024
CO2
possesses
several
advantages,
including
strong
solubility,
effective
viscosity
reduction
ability,
and
low
miscible
pressure,
making
it
a
promising
candidate
for
enhanced
oil
recovery
(EOR).
Additionally,
due
to
its
adsorption
capture
mechanism,
shale
formations
are
considered
ideal
environments
storage.
However,
the
influence
of
heterogeneity
multi-scale
structure
on
migration
EOR,
storage
mechanism
is
not
clear.
In
this
study,
heterogeneous
model
containing
fractures
matrix
was
designed
based
scanning
electron
microscope.
The
multiphase–multicomponent–multirelaxation
used
study
fluid
in
process
huff-n-puff
reservoir.
By
analyzing
density
variations,
velocity
changes,
pressure
distributions,
effects
diffusion
coefficient,
parameters,
fracture
size
were
studied.
Furthermore,
by
changing
structure,
law
gas
explored.
comparison
between
water
performed.
Finally,
reservoir
transport
results
show
that
EOR
rate
(CSR)
proportional
coefficient.
main
factor
affecting
CSR
capacity
rock
CO2.
larger
CO2–oil
contact
area
leads
CSR,
highlighting
importance
induced
fractures.
addition,
found
superior
flooding,
showing
an
performance
advantage
about
15%.
This
helpful
practical
application
technology
field
unconventional
development
Physics of Fluids,
Journal Year:
2025,
Volume and Issue:
37(4)
Published: April 1, 2025
Based
on
dual-fractal
theory,
this
paper
proposes
a
novel
methodology
to
transform
nuclear
magnetic
resonance
(NMR)
measurements
into
relative
permeability
model,
thereby
realized
the
challenge
of
accurately
quantifying
multiphase
fluid
flow
in
porous
media.
The
model
integrates
multitude
parameters
associated
with
microscopic
pore
architecture
It
can
be
verified
through
case
studies
that
newly
constructed
demonstrates
excellent
applicability.
Furthermore,
we
have
discovered
correlation
between
segmentation
characteristics
relationship
radius
(r)
and
transverse
relaxation
time
(T2)
low-permeability
sandstone
reservoirs
number
peaks
NMR
curve.
Specifically,
single-peak
type
usually
divided
two
segments,
while
multi-peak
generally
three
segments.
comprehensive
fractal
dimension
(Dc)
derived
from
weighting
method
effectively
captures
holistic
core
heterogeneity.
small
diameter
pores
are
particularly
sensitive
variations
tortuosity
(Dτ),
structure
(Df),
Dc,
ε
(represents
size
ratios).
Given
wetting
phase
preferentially
occupies
pores,
its
is
significantly
affected
by
these
parameter
changes.
Conversely,
non-wetting
mainly
flows
large
thus
less
influenced
changes
parameters.
