Numerical investigation of fracture competitive propagation mechanisms for temporary plugging staged fracturing (TPSF) in shale gas reservoirs
Jianxiong Li,
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Zhanyuan Zhu,
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Wen Hua
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et al.
Computers and Geotechnics,
Journal Year:
2025,
Volume and Issue:
180, P. 107109 - 107109
Published: Jan. 27, 2025
Language: Английский
Algebraic multigrid method for tight oil reservoir simulation with nonlinear seepage
Long Li,
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Zhong Jinrui,
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Qinghua Feng
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et al.
Geosystem Engineering,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1 - 7
Published: Feb. 8, 2025
Language: Английский
Research on Shale Fracture Propagation Control Based on the Perforation Sealing Law of Ball Sealer
Qianli Lu,
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B. Kuang,
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Jianchun Guo
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et al.
Published: April 21, 2025
Abstract
During
shale
gas
well
fracturing,
the
equilibrium
of
fracture
propagation
is
poor
due
to
influence
formation
heterogeneity
and
stress
interference
between
fractures.
Wellbore
temporary
plugging
an
effective
measure
control
propagation.
However,
in
perforation
parameters
mainly
rely
on
empirical
design.
Under
same
parameters,
effect
production
different
fracturing
sections
are
quite
different,
which
reflects
law
ball
sealer
sealing
unclear.
To
solve
above
problems,
this
paper
built
a
CFD-DEM
horizontal
wellbore
model,
analyzes
migration
characteristics
sealer,
forms
judgment
conditions
for
holes.
On
basis,
adaptive
model
by
coupling
flow
distribution
phase
field
model.
This
can
realize
calculation
position
path
after
plugging.
Based
Weiyuan
block
Sichuan
Basin,
simulation
under
multi-cluster
was
carried
out.
The
results
show
that
fractures
at
heel
side
toe
propagate
faster
uniform
mode.
Additionally,
simulated
preferentially
seals
holes
side.
After
plugging,
inhibited,
over-propagated.
Therefore,
we
propose
variable
number
mode,
each
cluster
gradually
increases
from
side,
slowly.
In
process
sealed,
thereby
accelerates
slow-propagation
ultimately
forming
overall
more
balanced
morphology.
study
applied
WH6
block.
Compared
with
section
perforation,
coefficient
increased
41.3
%,
sand
influx
variation
decreased
38.7
%.
findings
great
significance
guide
optimization
design
scheme
wells,
helpful
improve
reservoir
effect.
Language: Английский
Mechanistic Study on the Effect of Seepage Force on Fracture Propagation Behavior in Multi-cluster Fracturing of Horizontal Wells
Petroleum Research,
Journal Year:
2025,
Volume and Issue:
unknown
Published: May 1, 2025
Language: Английский
Study on the Interaction Propagation Mechanism of Inter-Cluster Fractures under Different Fracturing Sequences
Xiaojun Cai,
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Weixuan Zhao,
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Tianbao Hu
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et al.
Processes,
Journal Year:
2024,
Volume and Issue:
12(5), P. 971 - 971
Published: May 10, 2024
Horizontal-well
multi-cluster
fracturing
is
one
of
the
most
important
techniques
for
increasing
recovery
rate
in
unconventional
oil
and
gas
reservoir
development.
However,
under
influence
complex
induced
stress
fields,
mechanism
interaction
propagation
fractures
within
each
segment
remains
unclear.
In
this
study,
based
on
rock
fracture
criteria,
combined
with
boundary
element
displacement
discontinuity
method,
a
two-dimensional
numerical
simulation
model
hydraulic
crack
planar
plane
was
established.
Using
model,
process
inter-cluster
different
sequences
horizontal
well
segments
field
effects
were
analyzed.
The
cluster
spacing,
design
length,
internal
pressure
morphology
also
investigated.
research
results
indicate
that,
when
using
alternating
it
advisable
to
appropriately
increase
spacing
weaken
inhibitory
effect
around
created
by
prior
subsequent
fracturing.
Compared
symmetrical
method
more
complex.
At
smaller
are
susceptible
being
captured
from
findings
study
provide
reliable
theoretical
support
optimization
processes
segments.
Language: Английский
Discrete element-based multi-cluster hydraulic fracture extension study with temporary plugging and fracturing in horizontal wells
Physics of Fluids,
Journal Year:
2024,
Volume and Issue:
36(6)
Published: June 1, 2024
In
this
paper,
a
two
dimensional-discrete
element
method
complex
fracture
extension
model
was
developed
to
simulate
the
behavior
in
reservoirs
during
multi-cluster
perforation
fracturing
of
horizontal
wells
by
particulate
flow
and
considering
temporary
plugging
conditions.
The
effect
particle
inhomogeneity
on
fractures,
change
extending
characteristics
before
after
plugging,
geological
construction
parameters
fractures
under
consideration
conditions
are
investigated
model.
results
show
that:
(1)
middle
cluster
is
more
difficult
extend
than
outermost
due
interstitial
stress
interference;
increased
nonuniformity
particles
aggravates
interference
favors
shear
extension.
(2)
Fractures
expand
substantially
when
fluid
reaches
3/4
total
volume;
it
can
promote
uniform
increase
length
but
formed
easy
be
captured
at
ends
along
it,
not
form
fractures;
timing
based
percentage
clusters
with
already
formed,
being
preferred.
(3)
principal
difference
mainly
affects
direction
extension;
number
uniformity
Language: Английский
Coupling Study of Fracture Propagation–Filtration–Seepage during Hydraulic Fracturing Assisted Oil Displacement in Offshore Low-Permeability Reservoirs
Feng Wei,
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Mingguang Tang,
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Xuan Deng
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et al.
ACS Omega,
Journal Year:
2024,
Volume and Issue:
10(1), P. 1761 - 1771
Published: Dec. 26, 2024
Offshore
low-permeability
reservoirs
are
mainly
composed
of
complex
fault-block
structures
with
poor
physical
properties,
which
makes
establishing
an
effective
displacement
relationship
particularly
challenging.
Hydraulic
fracturing
assisted
oil
(HFAD)
can
effectively
increase
the
production
a
single
well
by
creating
fractures
to
replenish
producing
energy.
In
this
study,
Khristianovich–Geertsma–de
Klerk
(KGD)
model
is
used
calculate
propagation
vertical
fractures,
and
flow
tube
method
two-phase
oil–water
in
filtration
seepage.
The
semianalytical
mathematical
for
coupling
fracture
propagation,
filtration,
seepage
HFAD
fluid
established,
followed
conducting
sensitivity
analysis
main
controlling
factors
analysis.
contrast
conventional
methods,
during
process
taken
into
account.
Based
on
actual
data,
half-length
wellhead
pressure
verified.
mean
calculation
accuracy
88.5%,
90.7%.
research
results
indicate
that
occur
simultaneously,
including
rapid
early
stage,
discontinuous
middle
only
infiltration
without
later
stage.
Infiltration
considered
key
factor
HFAD,
higher
rate
leading
weaker
energy
storage
at
tip.
viscosity
significantly
impacts
distance,
contributing
35%
27%,
respectively.
To
half-length,
select
thinner
reservoir,
viscosity,
boost
injection
rate.
choose
permeability
reservoirs,
reduce
cumulative
volume.
study
provide
valuable
basis
design
construction
scheme
offshore
reservoirs.
Language: Английский