Experimental study on production characteristics and enhanced oil recovery during imbibition and huff-n-puff injection in shale reservoir
Capillarity,
Год журнала:
2024,
Номер
12(2), С. 41 - 56
Опубликована: Июнь 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
Язык: Английский
Experimental study on microscopic production characteristics and influencing factors during dynamic imbibition of shale reservoir with online NMR and fractal theory
Energy,
Год журнала:
2024,
Номер
unknown, С. 133244 - 133244
Опубликована: Сен. 1, 2024
Язык: Английский
A New Transformation Method of the T2 Spectrum Based on Ordered Clustering—A Case Study on the Pore-Throat Utilization Rule of Supercritical CO2 Flooding in Low Permeability Cores
Applied Sciences,
Год журнала:
2025,
Номер
15(2), С. 730 - 730
Опубликована: Янв. 13, 2025
Nuclear
magnetic
resonance
(NMR)
and
high-pressure
mercury
injection
(HPMI)
have
been
widely
used
as
common
characterization
methods
of
pore-throat.
It
is
generally
believed
that
there
a
power
function
relationship
between
transverse
relaxation
time
(T2)
pore-throat
radius
(r),
but
the
segmentation
process
interval
subjective,
which
affects
conversion
accuracy.
In
this
paper,
ordered
clustering
to
improve
existing
method
interval,
eliminate
subjectivity
in
process,
obtain
more
accurate
distribution
curve
For
three
kinds
cores
with
ordinary-low
permeability
(K
>
1
mD),
ultra-low
(0.1
mD
<
K
super-low
0.1
curves
were
obtained
by
using
improved
T2
method.
Then,
oil
gas
two-phase
displacement
experiment
was
carried
out
investigate
degree
recovery
cumulative
gas–oil
ratio
changes
during
process.
Finally,
converted
spectrum
quantify
utilization
different
pore
sizes.
The
not
only
has
better
accuracy
also
limited
types
(such
unimodal,
bimodal,
multi-modal,
etc.)
suitable
for
any
core
measured
HPMI
an
NMR
spectrum.
Combined
results
utilization,
it
found
potential
miscible
flooding
order
(18–22%),
(25–29%),
(8–12%).
immiscible
<10
nm
low
(up
35%),
while
can
effectively
use
<3.7
73%).
development
effect
supercritical
CO2
on
reservoirs
good,
seepage
resistance
large,
makes
difficult
degree,
poor.
Язык: Английский
Pore-scale experimental investigation of microscopic formation mechanism of remaining shale oil and trapped CO2 during water-supercritical CO2 flooding
Lian Li,
Yong Kang,
Feng Liu
и другие.
Geoenergy Science and Engineering,
Год журнала:
2025,
Номер
unknown, С. 213684 - 213684
Опубликована: Янв. 1, 2025
Язык: Английский
Simulation of nuclear magnetic resonance response based on the high-resolution three-dimensional digital core
Physics of Fluids,
Год журнала:
2024,
Номер
36(6)
Опубликована: Июнь 1, 2024
Numerical
simulation
of
nuclear
magnetic
resonance
(NMR)
can
simulate
experimental
scenarios
and
quantify
the
impact
each
factor
on
physical
characteristics.
However,
general
methods
lack
authentic
pore
structure
information
fail
to
accurately
model
complex
geometry
rocks.
High-resolution
digital
rock
cores
effectively
reflect
structure.
In
this
paper,
a
high-resolution
core
Berea
sandstone
is
taken
as
research
object,
parameters
(e.g.,
volume
surface-to-volume
ratio)
are
quantified,
12
529
pores
extracted
from
three-dimensional
statistically
analyzed.
Subsequently,
classified
based
their
ratio
volume.
After
calibrated
by
experiments,
NMR
response
different
water-saturated
simulated.
Finally,
with
oil
saturation
We
find
that
distribution
quantity
in
terms
surface
area
both
follows
power
function.
There
strong
correlation
between
area,
especially
for
smaller
pores.
The
T2
(transverse
relaxation
time)
spectrum
generally
distribution,
but
it
may
not
when
large.
also
observe
peak
reflecting
bulk
positioned
left
due
combined
effects
residual
water
diffusion
relaxation.
These
results
provide
basis
interpreting
measurements
help
identify
fluids
reservoirs.
Язык: Английский
A Study on Effect Analysis and Process Parameter Optimization of Viscous Acid Acidification in a Porous Heterogeneous Carbonate Reservoir
Processes,
Год журнала:
2024,
Номер
12(7), С. 1443 - 1443
Опубликована: Июль 10, 2024
The
homogeneous
acid
etching
of
conventional
in
porous
heterogeneous
carbonate
reservoirs
leads
to
a
large
amount
consumption
the
near-wellbore
area,
which
makes
acidification
effect
often
not
ideal.
In
order
improve
acidizing
reservoirs,
viscous
is
used
increase
stimulation
target
block
this
paper.
Through
systematic
experiments,
adaptability
four
layers
M
reservoir
was
evaluated,
and
MD
ME
suitable
for
were
determined
combination
with
physical
property
analysis.
Finally,
based
on
geological
characteristics
experimental
data
preferred
layers,
two-scale
wormhole
growth
radial
model
established,
construction
parameters
optimized.
results
show
that
(1)
system
has
dissolution
rate
more
than
95%
rock
powder
layers.
When
matrix
permeability
high,
obvious
higher.
(2)
steel
sheet
corrosion
residual
damage
experiments
showed
corrosive
wellbore,
after
reaction
low.
(3)
Based
relationship
between
porosity
position
edge
bottom
water,
potential
are
selected.
(4)
numerical
simulation
optimal
pump
1.4
bpm
1.0
bpm,
fluid
volume
255
bbl,
can
form
effective
wormholes,
range
transformation
largest.
field
application
optimization
scheme
effectively
improves
production
oil
wells,
verifies
practicability
scheme,
provides
reference
process
same
type
stimulation.
Язык: Английский
Impact of Micro-Parameters in Volcanic Reservoir on Gas Migration by Micro-Nano 3d Ct Scanning
Опубликована: Янв. 1, 2024
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DOI
Язык: Английский
Micro-Nano 3d Ct Scanning to Assess the Impact of Microparameters of Volcanic Reservoirs on Gas Migration
Опубликована: Янв. 1, 2024
Язык: Английский
Simulation Study of Microscopic Seepage in Aquifer Reservoirs with Water–Gas Alternated Flooding
Energies,
Год журнала:
2024,
Номер
17(16), С. 4149 - 4149
Опубликована: Авг. 21, 2024
Underground
gas
storage
(UGS)
is
a
beneficial
economic
method
of
compensating
for
the
imbalance
between
natural
supply
and
demand.
This
paper
addresses
problem
lack
research
on
two-phase
distribution
pattern
seepage
law
during
water–gas
alternated
flooding
in
reservoirs.
The
study
constructed
three-dimensional
digital
core
aquifer
reservoir
based
Computed
Tomography
(CT)
scanning
technology,
extracted
connecting
pore
structure
to
establish
tetrahedral
mesh
model.
A
microscopic
model
was
established
Volume
Fluid
(VOF)method,
gas–liquid
unsaturated
simulation
carried
out.
results
show
that
effective
capacity
increases
with
increase
number
cycles.
irreducible
water
mainly
distributed
dead-end
space
small
throats,
residual
as
band
gas–water
interface
previous
round.
can
be
increased
by
appropriately
increasing
intensity
injection
extracting
decreasing
pressure
reservoir.
Язык: Английский