Processes,
Год журнала:
2025,
Номер
13(4), С. 983 - 983
Опубликована: Март 26, 2025
Spontaneous
counter-current
imbibition
is
a
crucial
recovery
mechanism
in
water-wet
fractured
reservoirs,
especially
unconventional
formations
like
tight
and
shale
reservoirs.
The
geometric
characteristics
of
microscale
fractures
require
further
clarification
regarding
their
impact
on
imbibition.
In
this
paper,
the
numerical
simulation
method
used
to
study
influence
fracture
aperture,
length,
density,
relative
position
between
open
face
process
matrix
block.
For
perpendicular
surface
contact
with
water,
embedded
discrete
model
utilized
simulate
varying
apertures
parallel
surface,
considering
capillary
discontinuity
matrix,
effects
lengths
densities
are
simulated.
results
show
that
when
rate
can
be
increased,
as
aperture
decreases,
first
increases
then
decreases.
On
other
hand,
inhibit
process,
decreasing
length
or
density
increases.
This
paper
proposes
an
empirical
shape
factor
fractures,
which
effectively
characterize
microfractures
block
imbibition,
thus
improving
dual-medium
model.
Frontiers in Earth Science,
Год журнала:
2025,
Номер
13
Опубликована: Апрель 2, 2025
Exceptionally
large,
well-exposed
sandstone
outcrops
in
New
York
provide
insights
into
folds,
deformation
bands,
and
fractures
that
could
influence
permeability,
heat
exchange,
stimulation
outcomes
of
geothermal
reservoir
targets.
Cambrian
Potsdam
Sandstone
with
<5%
porosity
contains
decimeter-scale
open,
angular-limbed
monoclines
<0.5
km
apart
associated
low-porosity
mm-wide
cataclastic
bands.
Crossing
abutting
relationships
among
sub-vertical
opening-mode
show
four
chronological
Sets
A–D,
striking
NNW,
NE,
NW,
ENE,
respectively.
Fracture
lengths
heights
range
from
millimeters
to
tens
meters.
A
C
macro-fractures,
possibly
B
D,
contain
quartz
deposits.
All
sets
have
abundant
cemented
microfractures
also
record
set
orientations
crosscutting
relations.
Quartz
cement
deposits—evidence
diagenesis—are
the
key
identifying
attributes
outcrop
suitable
for
extrapolation
targets
sandstones
because
they
which
formed
subsurface.
Set
fluid
inclusion
homogenization
temperatures
(120°C–129°C)
are
compatible
fracture
at
>3
depth.
Fractures
stiff
those
≥0.05
mm
(Set
C)
≥0.1
A)
open
potentially
conducive
flow.
D
close
spacing—0.18
m
0.68
m,
respectively—and
define
a
rectangular
connectivity
network
dominated
by
crossing
X
Y
nodes.
aperture
distributions
follow
power
law
slope
−0.8
up
0.15
mm;
other
lognormal
distributions.
weakly
clustered,
while
macro-fractures
commonly
1D
anticlustered
(regular
or
periodic)
arrangements
shorter
length
scales
(<0.2
m).
Sub-horizontal
barren
may
near
surface.
heights,
lengths,
spatial
good
trace
but
low
connectivity.
For
applications,
results
predict
initial
well-test
permeabilities
owing
disconnecting
fractures,
closely
spaced
partly
yield
high
surface
area
exchange.
Quantitative
like
abundance,
orientation,
arrangement,
length,
is
possible
fractured
reservoirs
if
differing
thermal
histories
diagenesis
accounted
for.
Marine and Petroleum Geology,
Год журнала:
2024,
Номер
167, С. 106927 - 106927
Опубликована: Июнь 6, 2024
Jointing
in
bedded
siliciclastic
sedimentary
successions
has
been
mainly
analyzed
terms
of
fractured
layers
thickness-normalized
joint
spacing
and
related
probability
distributions,
commonly
neglecting
the
influence
primary
structures
on
petrophysical
properties,
height
patterns,
spatial
arrangements
best-fitted
distributions.
Taking
into
account
depositional
controls
mechanical
fracture
stratigraphy
is
crucial
for
improving
predictive
potential
geological
modelling
exploration
exploitation
underground
resources,
gas
injection
storage.
Here,
we
present
a
high-resolution,
structural-stratigraphic
study
carried
out
72
m-thick
succession
Marnoso-arenacea
foredeep
turbidites,
exposed
Northern
Apennines
Italy.
The
systematic
integration
structural
sedimentological
characterization
this
basin-plain
turbiditic
succession,
coupled
with
geomechanical
measurements,
represents
database
onto
which
tested
standardly
used
density
parameters
i.e.
normal,
log-normal,
gamma
exponential,
applied
to
analysis.
Our
results
document
that
cumulative
analysis
does
not
identify
variability
patterns
distributions
instead
requires
considering
single
facies
types.
Specifically,
sandstones
are
affected
by
bounded
joints
while
clay-rich
poorly
sorted
show
higher
abundance
top
throughgoing
joints,
best
fitted
log-normal
We
suggest
should
be
studied
at
scale
resolution
unravel
strong
control
reservoirs.
Geophysical Journal International,
Год журнала:
2024,
Номер
238(3), С. 1165 - 1180
Опубликована: Июнь 16, 2024
SUMMARY
The
fine-scale
fractures
within
strike-slip
faults
substantially
impact
the
flowing
capacity.
However,
effective
methods
for
their
characterization
are
still
lacking,
making
it
challenging
to
predict
hydrocarbon
accumulation
patterns.
In
this
study,
we
conducted
microscopic
statistics,
ultrasonic
experiments
and
theoretical
modelling
analyse
fracture
density
elastic
characteristics
fault
investigated
of
stress.
Our
findings
reveal
that
in
core
is
3–4
times
higher
than
damage
zone,
acoustic
velocity
13–18
per
cent
lower
under
atmospheric
pressure.
With
rising
confining
pressure,
initially
decreases
rapidly
then
slowly,
while
follows
same
increasing
trend.
gradually
slowing
trend
indicates
majority
close
range
0–20
MPa.
Moreover,
stress
sensitivity
bulk
modulus
shear
modulus.
which
correlates
strongly
with
variation
density.
These
indicate
fault-controlled
rock
attributed
stress-induced
deformation,
predominantly
manifested
as
volumetric
compression
deformation.
During
geological
evolution,
differences
tectonic
faulting,
fluid
filling
compaction
zone
contribute
present
heterogeneity
Finally,
our
research
demonstrates
a
strong
correlation
between
prediction
results
underground
logging,
drilling
data.
can
help
distribution
response
carbonate
reservoirs
controlled
by
faults.
Energy geoscience conference series.,
Год журнала:
2024,
Номер
1(1)
Опубликована: Окт. 8, 2024
Fracture
lengths
govern
permeability
and
are
unknowns
in
geothermal
assessment.
Along
their
lengths,
fracture
widths
vary
due
to
growth
by
linkage.
Under
the
influence
of
diagenesis,
narrow
seal,
breaking
porosity
continuity
reducing
open
length.
The
largest
range
thus
susceptibility
fill
occurs
where
fractures
linked
segments.
Outcrops
a
target,
Cambrian
Potsdam
quartz
arenite,
contain
opening-mode
having
spanning
five
orders
magnitude
from
0.082
mm
17.9
m.
Combined
measured
at
scales
can
be
described
power
laws,
but
given
image
resolution,
best
fit
exponential
functions.
Owing
preferential
sealing
small
fractures,
follow
functions,
values
depend
on
rules
for
designating
as
continuous.
En
échelon
segments,
offset
10
mm,
connected
or
microfractures
(hard
linked)
not
evident
outcrop
1
m-elevation
LiDAR
30
m-height
drone
images.
A
rule
that
identifies
likely
segments
located
yield
meaningful
flow
simulation.
Depending
halve
double
average
maximum
length
values.
Length
applications
should
adjusted
based
wellsite-specific
diagenesis
information.
