In
recent
years,
S
plant
has
implemented
scale
encryption
adjustment,
and
the
number
of
drilling
shutdown
wells
increased
year
by
year,
which
a
greater
impact
on
output
oil
fields.
Because
influence
reservoir
physical
properties
connection,
wellhead
pressure
water
well
before
is
quite
different,
so
uniform
cycle
can
not
be
determined.
order
to
minimize
reduction
in
field
production
increase
discharge
costs,
relaxed
stable
from
3
MPa
7
head
600
m
injection
for
drilling.Through
comparison
time,
production,
cementing
quality
safety,
it
proved
that
feasible
relax
drilling.
The
parameters
are
optimized,
test
carried
out,
development
effect
comprehensively
evaluated,
feasibility
effectiveness
relaxation
explored,
provides
technical
reference
operation.
ACS Omega,
Год журнала:
2024,
Номер
9(13), С. 14747 - 14765
Опубликована: Март 19, 2024
With
the
increasing
oil
demand,
more
attention
has
been
paid
to
enhancing
recovery
in
old
fields.
CO2
flooding
is
popular
due
its
high
displacement
efficiency
and
ability
reduce
greenhouse
gas
emissions.
Laboratory
experiments
on-site
application
cases
have
shown
that
minimum
miscibility
pressure
a
greater
impact
on
than
other
factors.
If
reservoir
below
miscible
pressure,
then
there
immiscible
flooding.
Both
theoretical
analysis
experimental
results
show
rate
of
2–5
times
higher
increased
by
water
before
injection,
it
easily
limited
physical
property
parameters.
Therefore,
accurately
determining
effectively
reducing
mixing
become
focus
research.
Currently,
are
two
types
methods
for
pressure:
methods.
The
method
generally
considered
accurate,
including
slim
tube
test,
rising
bubble
apparatus,
vanishing
interfacial
tension,
etc.
However,
worth
noting
dynamically
changing,
will
be
economic
costs
if
measured
repeatedly
through
during
development.
recognized
can
determined
at
any
time
using
calculation
initial
data,
which
degree.
In
this
paper,
divided
into
empirical
correlation,
state
equation,
artificial
intelligence
algorithm.
techniques
classified
categories:
solvents
surfactant
solvent
further
monocomponent
polycomponent
This
paper
compares
advantages
disadvantages
existing
measuring
MMP
selects
best
method.
Petroleum,
Год журнала:
2023,
Номер
10(2), С. 202 - 215
Опубликована: Дек. 4, 2023
The
development
of
low
permeability
oil
and
gas
resources
presents
a
significant
challenge
to
traditional
methods.
To
address
the
problem
"no
injection
no
production"
in
reservoirs,
novel
fracture-injection-production
integration
technology
named
fracturing-flooding
has
been
proposed
by
oilfield
sites.
This
combines
advantages
conventional
fracturing,
water
flooding,
chemical
resulting
improved
reservoir
physical
properties,
increased
injection,
replenished
energy,
displacement
efficiency.
is
especially
suitable
for
reservoirs
that
suffer
from
permeability,
lack
strong
heterogeneity.
Fracturing-flooding
shown
results
broad
prospects
some
oilfields
China.
paper
analyzes
status
various
aspects,
such
as
its
history,
technical
mechanism,
characteristics,
process
flow,
types
fracturing
fluids,
field
applications.
Physical
numerical
simulations
are
also
summarized.
suggest
more
effective
than
flooding
stimulating
low-permeability
tight
improving
recovery.
Moreover,
it
high
input-output
ratio
can
be
utilized
future
stimulation
transformation.
Toxics,
Год журнала:
2024,
Номер
12(9), С. 648 - 648
Опубликована: Сен. 4, 2024
As
the
energy
demand
increases,
there
is
a
significant
expansion
and
utilization
of
oil
resources,
resulting
in
inevitable
occurrence
environmental
pollution.
Oil
has
been
identified
as
prevalent
soil
contaminant,
posing
substantial
risks
to
ecosystems.
The
remediation
contaminated
with
formidable
undertaking.
Increasing
evidence
shows
that
chemical
washing,
technique
employing
reagents
like
surfactants
augment
solubilization,
desorption,
separation
petroleum
hydrocarbons
soil,
proves
be
an
efficacious
approach,
but
latest
advances
on
this
topic
have
not
systematically
reviewed.
Here,
we
present
state
knowledge
about
surfactant-based
washing
remediate
oil-contaminated
soil.
Using
data,
article
summarizes
advancements
ex
situ
pollution
provides
concise
summary
underlying
principles.
use
various
factors
influencing
efficiency
are
highlighted.
Based
current
research
status
gaps,
future
perspectives
proposed
facilitate
oil-polluted
This
review
can
help
recognize
application
Molecules,
Год журнала:
2023,
Номер
28(24), С. 8042 - 8042
Опубликована: Дек. 11, 2023
CO2
foam
injection
has
been
shown
to
be
effective
under
reservoir
conditions
for
enhanced
oil
recovery.
However,
its
application
requires
a
certain
stability
and
surfactant
absorbability
on
rock
surface,
it
is
also
associated
with
borehole
corrosion
in
the
presence
of
water.
Adding
surfactants
can
enhance
interaction
between
crude
control
mobility,
thereby
improving
performance
flooding.
This
paper
presents
review
research
CO2-soluble
their
applications.
Molecular
dynamics
simulation
introduced
as
tool
analyzing
behavior
supercritical
(scCO2).
The
applications
surfactants,
including
thickening,
reducing
miscibility
pressure,
generating
foam,
are
discussed
detail.
Moreover,
some
opportunities
development
proposed.
Ultrasonics Sonochemistry,
Год журнала:
2025,
Номер
114, С. 107260 - 107260
Опубликована: Фев. 7, 2025
CO2
flooding
is
considered
one
of
the
most
important
methods
for
reducing
emissions
and
increasing
oil
production
from
reservoirs.
However,
challenges
low
recovery
rates
poor
economic
benefits
in
immiscible
significantly
hinder
its
widespread
application.
To
address
these
issues,
this
paper
proposes
use
ultrasonic-assisted
to
enhance
(EOR)
analyzes
underlying
mechanisms.
First,
distribution
characteristics
residual
were
examined
using
high
pressure
mercury
injection
(HPMI),
nuclear
magnetic
resonance
(NMR),
microscopic
visualization
displacement
(MVD)
experiments.
Next,
changes
after
applying
analyzed.
Finally,
mechanism
EOR
through
was
summarized
based
on
results
interfacial
tension
(IFT)
tests.
The
findings
indicate
that
rate
without
ultrasound
53.33
%,
with
primarily
distributed
form
films
flakes
within
pores.
ultrasonic
assisted
frequency
28
KHz
power
200
W
provided
by
horn,
increased
62.84
%
60
min.
With
assistance,
maximum
radius
droplets
reduced
81.8
μm
36.5
μm.
Additionally,
amount
0.1
1
range
slightly
decreased,
suggesting
assistance
mainly
improves
flake
oil,
a
slight
improvement
film
as
well.
Ultrasound
can
enlarge
pore
throat
reduce
CO2-oil
system,
allowing
more
be
displaced.
Moreover,
high-frequency
vibrations
thickness
film,
enhancing
oil.
This
study
supports
further
application
both
scientific
research
engineering
practice.
CO2
flooding
can
effectively
enhance
oil
recovery
in
tight
reservoirs.
However,
the
mobilization
characteristics
and
interlayer
mass
transfer
mechanism
of
crude
heterogeneous
reservoirs
with
permeability
ratio
(PR)
remain
unclear.
We
simulated
by
fabricating
artificial
PR
cores
conducted
experiments
under
different
miscibility
states.
Moreover,
nuclear
magnetic
resonance
was
employed
to
distinguish
quantify
high-permeability
layers
(HPLs)
low-permeability
(LPLs),
revealing
mechanisms.
The
results
indicated
that,
compared
those
immiscible
partially
miscible
flooding,
yielded
a
higher
overall
recovery,
continuing
increase
after
breakthrough.
This
is
primarily
due
significant
efficiency
LPL.
At
this
stage,
displacement
becomes
less
effective,
mechanisms,
such
as
extraction
diffusion
between
HPL
LPL,
become
dominant
drivers
recovery.
In
state,
oil–gas
interfacial
tension
vanishes,
thus
enhancing
effects.
significantly
promotes
transfer,
mobilizing
contributions
LPL
during
were
quantified,
that
final
contribution
former
1.69
times
greater
than
latter.
verifies
primary
for
breakthrough,
emphasizing
its
critical
role
processes.
