Langmuir,
Journal Year:
2023,
Volume and Issue:
39(49), P. 17972 - 17983
Published: Dec. 1, 2023
Spontaneous
imbibition
has
garnered
increasing
attention
as
an
attractive
mechanism
for
developing
tight
reservoirs.
Despite
valuable
insights
from
previous
experiments,
there
remains
a
lack
of
understanding
regarding
the
process
within
multiscale
nanopore-fracture
networks.
In
this
work,
we
devised
innovative
model
incorporating
over
105
nanochannels
and
integrating
microfracture
network
to
explore
complex
behavior
in
formations.
Additionally,
fracture-free
nanomatrix
models
with
low
permeability
were
developed
comparative
discussions.
The
results
show
that
Lucas–Washburn
equation
valid
at
tremendous
nanopore
networks
under
confinement
500
nm,
relative
deviation
±6%.
nanomatrix's
heterogeneity
hinders
rate,
resulting
reduction
4.6
10.8%
slope.
viscosity
plays
dominant
role
change
slope
temperature
varies.
Our
experiments
also
found
interactions
between
bulk
fracture
complicate
process.
A
single
wetting
front
no
longer
applies
nanomatrix–fracture
Differing
fracture/microchannel
connectivity
leads
disparities
macroscopic
patterns,
saturation
rates,
flow
directions.
spatial
arrangement
fractures
significantly
impacts
time.
Overall,
work
based
on
nanofluidic
techniques
systematically
explores
effects
matrix
heterogeneity,
temperature,
real-time
situ
visualization
fluid
distribution
matrix–fracture
systems
been
achieved,
which
offers
theoretical
guidance
practical
engineering
applications.
Energy & Fuels,
Journal Year:
2023,
Volume and Issue:
37(4), P. 2539 - 2568
Published: Jan. 30, 2023
Despite
rapid
advances
in
renewable
energy
extraction
and
utilization,
global
oil
demand
continues
to
rise.
Oil
displacement
technologies
are
widely
studied
applied
because
they
can
extract
more
depleted
reservoirs
or
recover
unconventional
ones.
This
study
introduces
research
methods
mechanisms
of
four
technologies,
i.e.,
water
flooding,
chemical
gas
steam
flooding.
Although
helping
meet
the
growing
for
energy,
there
still
some
challenges
industrial
applications.
Some
agents
adopted
have
shortcomings
corrosion
mining
equipment
damage
reservoir
structure.
Therefore,
solutions
problem
crucial
investigated
literature
using
experiments
simulations.
For
experimental
research,
a
diffusion
framework
studying
mass
transfer
process
an
system
simulating
offshore
should
be
built,
which
will
facilitate
widespread
application
technology.
it
is
necessary
improve
accuracy
expand
range
system.
As
numerical
simulation,
reaction
kinetics
essential
selecting
agent
materials
preventing
harmful
leakage
However,
dynamics
foam
flooding
CO2
not
thoroughly
studied.
Moreover,
acceptable
topic
that
reducing
uncertainty
discrete
regions
effective
method
simulation
results.
broader
technology
industry,
several
regarding
field
could
comprehensively
future,
(1)
influence
impurities
complex
physical
properties,
(2)
combining
various
(3)
T-H-M-C
multifield
coupling
mechanism
at
micro/nanoscale,
(4)
cement
failure
caused
by
H2S,
(5)
tube
brittle
fracture
stress
corrosion.
sustainable
development
efficient
utilization
displacement,
this
review
summarizes
extensive
information
about
thus
encouraging
providing
topics
further
SPE Journal,
Journal Year:
2023,
Volume and Issue:
28(04), P. 1880 - 1894
Published: Feb. 1, 2023
Summary
For
conventional
particles
used
for
conformance
control
in
fractured-vuggy
reservoirs,
large-size
easily
plug
the
wellbore
area
but
have
difficulty
plugging
zone
far
from
wellbore,
while
small-size
move
depth.
In
this
study,
fiber
balls
bridging
reservoirs
were
developed
by
wrapping
precrosslinked
gel.
Due
to
influence
of
temperature
and
salinity
formation,
gel
degraded
filamentous
fibers
released.
Then,
released
bridged
fractures
reducing
safety
risk
injection
process.
As
a
water
agent,
can
decrease
conductivity
high-permeability
increase
low-permeability
fractures,
thus
improving
waterflooding
efficiency
enhancing
oil
recovery.
The
performance
was
evaluated
coreflooding
experiments.
experimental
results
show
that
optimal
formulation
is
7%
acrylamide
(AM)
+
3%
polyamino
acid
ester
0.75%
potassium
persulfate
(K2S2O8)
4%
polypropylene
glass
0.15%
polyethylene
glycol
diacrylate
(PDA)
0.08%
N,N-dimethyl
(MBA)
0.1%
polyacrylamide
(PAM).
release
time
external
42
57
hours,
meeting
requirements
control.
According
evaluation,
larger
fracture
width,
worse
effect
fibers.
Besides,
rule
“3/2
bridging”
proposed:
When
length
3/2
times
has
strongest
ability.
With
concentration
needs
be
increased
good
performance.
study
provide
new
idea
technology
reservoirs.
Energy & Fuels,
Journal Year:
2022,
Volume and Issue:
36(22), P. 13451 - 13478
Published: Oct. 26, 2022
Chemical-enhanced
oil
recovery
(cEOR)
is
a
class
of
techniques
commonly
used
to
extract
hydrocarbon
fluids
from
reservoir
rocks
beyond
conventional
waterflooding.
Surfactants
are
among
the
chemical
agents
employed
in
cEOR
process,
as
they
aid
enhancing
by
lowering
oil–water
interfacial
tension
(IFT)
and
altering
rock
wettability
toward
less
oil-wet
conditions.
Understanding
flow
characteristics
mechanisms
involved
during
surfactant
flooding
helps
improve
performance
injected
surfactants
results
higher
recovery.
The
objective
this
review
outline
recent
applications
different
methods
understand
behavior
surfactant-enhanced
begins
with
general
background
highlighting
basic
main
which
exert
their
influence.
Recent
studies
conducted
investigate
through
then
presented,
including
traditional
coreflooding
experiments,
microfluidics
studies,
sand
packs.
methodology
analysis
interpretation
data
obtained
tests,
factor,
pressure
data,
relative
permeability,
also
described.
Pore-scale
imaging
nuclear
magnetic
resonance
(NMR),
(MRI),
X-ray
medical
microcomputed
tomography
(μCT)
scanning
applicability
assessing
Finally,
few
examples
field
monitoring
for
highlighted.
This
provides
knowledge
multiscale
evaluation
flooding.
Energy & Fuels,
Journal Year:
2022,
Volume and Issue:
36(5), P. 2407 - 2423
Published: Feb. 21, 2022
Low
salinity
effects
(LSE)
improved
recovery
could
be
obtained
by
reducing
and/or
modifying
the
specific
ions
of
injected
brines.
waterflooding
(LSW)
is
described
as
a
certain
low-cost
and
eco-friendly
oil
technique,
when
referring
enhanced
(EOR)
potential
laboratory
observations
field
pilots
in
recent
decades.
Various
underlying
mechanisms
behind
LSE
were
proposed,
including
saponification,
multi-ionic
exchange
(MIE),
electric
double-layer
(EDL)
expansion,
fines
migration,
salt
effect,
osmotic
so
on.
However,
first,
to
our
best
knowledge,
there
not
yet
mechanism
recognized
all
experts.
Second,
sandstones
always
taken
for
granted
applied
directly
carbonates,
without
considering
discrepancies
mineral
compositions
pore
structures.
Third,
spontaneous
imbibition
performances
usually
concluded
indication
wettability
alteration,
straightforward
on
caused
low
brine.
Review
results
reveal
necessary
conditions
influences.
Necessary
should
satisfied
trigger
LSE,
phase
with
polar
components,
connate
water,
brine
key
composition
salinity,
clay
minerals,
initial
performance.
Their
sole
or
mutual
interactions
influence
functions.
Mechanisms
classified
into
two
types:
solid–liquid
liquid–liquid.
These
(e.g.,
EDL
MIE,
migration)
attributed
while
microdispersion,
osmosis
snap-off
belong
liquid–liquid
interfacial
factor.
Sandstones
mainly
consist
quartz
clay,
initially
tending
behave
water
wetness,
carbonates
calcium
carbonate
magnesium
carbonate,
behaving
oil-wet.
Therefore,
are
contributed
related
other
factors.
The
findings
this
study
can
help
better
understanding
speeding
up
further
endeavors
explore
its
EOR.
