Preparation and plugging characteristics investigation of a high temperature induced calcium salt precipitation system for profile control in high temperature reservoirs
Colloids and Surfaces A Physicochemical and Engineering Aspects,
Год журнала:
2025,
Номер
unknown, С. 136413 - 136413
Опубликована: Фев. 1, 2025
Язык: Английский
Study on enhancing heavy oil recovery through catalytic hydrothermal cracking using a dual in-situ strategy
Colloids and Surfaces A Physicochemical and Engineering Aspects,
Год журнала:
2025,
Номер
unknown, С. 136275 - 136275
Опубликована: Янв. 1, 2025
Язык: Английский
Mechanism and Formation Conditions of Foamy Oil During Gas Huff-n-Puff in Edge and Bottom Water Heavy Oil Reservoirs
Processes,
Год журнала:
2025,
Номер
13(4), С. 1127 - 1127
Опубликована: Апрель 9, 2025
The
thermal
development
in
heavy
oil
reservoirs
with
edge
and
bottom
water
is
poor,
while
gas
huff-n-puff
shows
a
high
recovery
strong
adaptability.
formation
of
foamy
during
one
the
reasons
for
recovery.
In
order
to
determine
factors
affecting
flow
huff-n-puff,
experiments
using
one-dimensional
sandpack
were
conducted.
influences
drawdown
pressure
cycle
number
analyzed.
conditions
preliminarily
clarified,
enhanced
(EOR)
mechanism
was
revealed.
experimental
results
show
that
are
two
important
oil.
Foamy
prone
forming
under
moderate
0.5–0.75
MPa,
being
too
small
or
large
unfavorable.
more
likely
form
first
cycles,
it
becomes
increasingly
challenging
increase
number.
These
reflect
necessary
huff-n-puff:
allowing
adequately
provide
shear
mixing
generation
micro-bubbles,
other
content
should
not
be
avoid
inability
disperse
stabilize
bubbles.
oil,
on
hand,
increases
volume
phase,
reduces
mobility
phase
slows
down
decline
rate
core,
thereby
enhancing
driving
force
displacement.
So,
influence
production
declined
by
about
26%,
average
increased
4.5–6.9%.
Язык: Английский
Calcium Precipitates as Novel Agents for Controlling Steam Channeling in Steam Injection Processes for Heavy Oil Recovery
Processes,
Год журнала:
2025,
Номер
13(5), С. 1319 - 1319
Опубликована: Апрель 25, 2025
Unconventional
heavy
oil
reservoirs
are
particularly
susceptible
to
steam
breakthrough,
which
significantly
reduces
crude
production.
Profile
control
is
a
crucial
strategy
used
for
stabilizing
production
and
minimizing
costs
in
these
reservoirs.
Conventional
plugging
agent
systems
the
thermal
recovery
of
currently
fail
meet
high-temperature,
high-strength,
deep
profile
requirements
this
process.
Precipitation-type
calcium
salt
blocking
agents
demonstrate
long-term
stability
at
300
°C
concentrations
up
250,000
mg/L,
making
them
highly
effective
channeling
blockage
during
injection
stages
recovery.
This
study
proposes
two
types
precipitation-type
agents:
CaSO4
CaCO3
crystals.
The
precipitation
behavior
was
investigated,
their
dynamic
growth
patterns
were
examined.
sulfate
exhibits
slower
crystal
rate,
allowing
single-solution
injection,
while
carbonate
precipitates
rapidly,
requiring
dual-solution
injection.
Both
incorporate
scale
inhibitors
delay
crystals,
aids
control.
Through
microscopic
visualization
experiments,
micro-blocking
characteristics
within
pores
compared,
elucidating
positions
precipitated
salts
under
porous
conditions.
Calcium
crystals
preferentially
precipitate
block
larger
pore
channels,
whereas
more
evenly
distributed
throughout
reducing
reservoir’s
heterogeneity.
final
single-core
displacement
experiment
demonstrated
sealing
properties
systems.
developed
exhibit
excellent
performance.
Язык: Английский
Enhanced recovery in heavy oil reservoirs with interlayers using flue gas-assisted VH-SAGD: A 2D visualization study
Petroleum Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 1, 2025
Язык: Английский
A novel strategy to enhance heavy oil Recovery: Condensation heat transfer calculation and 2-D visualized physical simulation
Separation and Purification Technology,
Год журнала:
2024,
Номер
349, С. 127870 - 127870
Опубликована: Май 8, 2024
Язык: Английский
Experimental study on flue gas foam-assisted steam flooding: investigating characteristics of enhanced oil recovery and gas storage
Qiuying Cao,
Tao Wei,
Guanghuan Wu
и другие.
Frontiers in Energy Research,
Год журнала:
2023,
Номер
11
Опубликована: Ноя. 23, 2023
Steam
flooding
is
one
of
the
most
widely
used
heavy
oil
thermal
recovery
technologies.
transfers
heat
to
reduce
viscosity
and
improve
fluidity.
The
current
problem
that
steam
loses
a
lot
in
formation,
there
are
serious
carbon
emissions
whole
production
process.
In
this
paper,
flue
gas
were
combined
drive
form
composite
fluid,
foam
was
added
on
basis.
With
help
one-dimensional
sandpack
model,
both
single-model
parallel
dual-model
with
permeability
ratio
experiments
conducted
investigate
key
characteristics
such
as
transfer,
retention
during
displacement
experimental
results
indicated
effectively
inhibited
condensation
reduced
loss
flow
Compared
flooding,
model
exhibited
temperature
rises
4.4°C
9.1°C
at
middle
end,
respectively.
While
fell
slightly
short
terms
enhanced
it
outperforms
factor,
achieving
10.4%
improvement
over
gas-assisted
flooding.
blocked
channeling
by
accumulating
capturing
along
path,
resulting
volume
389
mL
within
model.
Furthermore,
facilitated
previously
unswept
low-permeability
areas,
thus
enhancing
recovery.
double-model
experiment,
significantly
improved
efficiency
compared
remaining
content
end
high
increased
1.9%,
while
front
3.5%
3.8%
Язык: Английский