Energy Science & Engineering,
Journal Year:
2024,
Volume and Issue:
12(6), P. 2643 - 2660
Published: May 27, 2024
Abstract
In
carbonate
reservoirs
characterized
by
the
fracture‐cavity
system
as
storage
spaces,
drilling
process
is
highly
prone
to
loss
of
fluid.
This
not
only
affects
efficiency
but
can
also
lead
severe
accidents,
such
blowouts.
Therefore,
it
crucial
understand
distribution
pattern
these
fractures.
However,
formation
rock
systems,
being
controlled
various
factors,
difficult
precisely
identify.
limitation
hampers
efficient
development
types
oil
and
gas
fields.
paper
presents
a
case
study
M5
5
sub‐section
reservoir
in
Sulige
gasfield,
proposing
an
improved
You
Only
Look
Once
v5s
(YOLOv5s)
deep
learning
algorithm.
It
utilizes
enhanced
training
with
conventional
logging
data
identify
response
characteristics
fractures
reservoirs.
And
its
identification
results
have
been
confirmed
be
accurate
fracture
obtained
through
different
means,
core
samples,
cast
thin
section
photographs,
imaging
data,
seismic
attributes.
method
incorporates
Ghost
convolution
module
replace
Conv
backbone
network
YOLOv5s
model,
modifies
C3
into
Bottleneck
module,
effectively
making
model
more
lightweight.
Additionally,
Convolutional
Block
Attention
Module
integrated
Neck
network,
enhancing
model's
feature
extraction
capabilities.
Finally,
employs
Efficient
Intersection
over
Union
Loss
function
instead
Complete
Loss,
reducing
network's
regression
loss.
The
validation
using
actual
demonstrate
that
this
achieves
average
recognition
accuracy
87.3%
for
system,
which
3%
improvement
baseline
(YOLOv5s).
enhancement
beneficial
locating
fluid
positions
Energy & Fuels,
Journal Year:
2024,
Volume and Issue:
38(11), P. 9923 - 9932
Published: May 14, 2024
Underground
hydrogen
storage
(UHS)
in
carbonate
reservoirs
is
a
suitable
solution
for
safe
and
efficient
recovery
during
the
cycling
process.
The
uncertainties
associated
with
potential
geochemical
reactions
between
hydrogen,
rock,
brine
may
impact
long-term
containment
of
produced
formations.
Despite
current
interest
studying
hydrogen-rock
reactions,
only
limited
work
available
literature.
In
this
study,
we
experimentally
evaluate
reactivity
rocks
to
address
gas
generation
induced
by
reactions.
Limestone
samples
are
treated
under
1500
psi
75
°C
temperature
duration
6
13
months
using
simple
reaction
cells.
Scanning
electron
microscopy
(SEM)
analysis
performed
examine
dissolution/precipitation
hydrogen.
contrast,
chromatography
(GC
analyzer)
inductively
coupled
plasma
optical
emission
spectroscopy
(ICP-OES)
conducted
detect
ion
precipitation.
experimental
results
indicate
no
significant
treatment
on
surface
morphology
pore
structure
even
after
treatment,
suggesting
that
abiotic
unlikely
occur
first
stages
UHS.
Furthermore,
presence
brine,
there
apparent
indications
occurring
calcite,
traces
any
other
gases
detected
treatment.
Besides,
solutions'
pH
remains
almost
unchanged,
minor
increase
calcium
(Ca2+)
ions
solution,
which
attributed
water,
not
promisingly
support
utilization
storage.
Journal of Petroleum Exploration and Production Technology,
Journal Year:
2023,
Volume and Issue:
13(10), P. 2083 - 2107
Published: July 7, 2023
Abstract
Reservoir
quality
in
carbonate
reservoirs
is
significantly
influenced
by
diagenetic
processes.
Although
diagenesis
studied
as
a
common
reservoir
damaging/enhancing
process
many
previous
studies,
literature
limited
about
the
spatial
modeling
of
processes
using
advanced
geostatistical
algorithms.
In
current
study,
3D
models
main
which
affect
Sarvak
an
Iranian
oilfield
located
north
Dezful
Embayment
were
constructed
geostatistics.
According
to
petrographic
total
10
microfacies
identified.
addition,
significant
this
include
dolomitization,
cementation,
dissolution,
and
compaction.
electrofacies
determined
“multi-resolution
graph
clustering”
method
based
on
quantitative
results
studies.
The
provided
average
maps
used
investigate
lateral
variation
those
properties
their
relationship
with
effective
porosity.
It
shows
that
trends
secondary
porosity
velocity
deviation
log
(VDL)
are
generally
correlatable
confirming
impact
dissolution
enhancement.
most
observed
Lower
Sarvak-E2
zone
where
correlation
coefficient
0.75.
between
VDL
some
zones
high
indicating
effect
it
exceeds
0.61
Sarvak-A1
zone.
occurrence
has
dual
constructive
destructive
effects
quality.
dolomitization
Sarvak-E1
Sarvak-F
coefficients
0.476
−
0.456,
respectively.
low
developing
stylolites,
solution
seams.
Heliyon,
Journal Year:
2023,
Volume and Issue:
9(12), P. e22346 - e22346
Published: Nov. 28, 2023
The
low-permeability
characteristic
of
sandstone-type
uranium
deposits
has
become
the
key
geological
bottleneck
during
in-situ
leaching
mining,
seriously
restricting
development
and
utilization
resources
in
China.
At
present,
blasting-enhanced
permeability
(BEP)
acidizing-enhanced
(AEP)
are
confirmed
to
be
mainstream
approaches
enhance
reservoir
deposit
(LPSUD).
To
clarify
synergistic
effect
BEP
AEP,
acid-rock
reaction
dynamic
impact
experiments
were
conducted,
aiming
study
chemical
reactions
on
pore
structure,
mechanical
properties
failure
pattern
sandstone.
Results
show
that
with
increasing
time,
total
volume
samples
is
promoted
largely
exhibits
obvious
damage.
change
depends
size,
100-1000
nm
1000-10000
pores
more
susceptible
reactions.
peak
strength
elastic
modulus
decreased
strain
rate
increased
when
lengthening
whose
evolution
laws
can
fitted
by
logistic
expression,
linear
expression
exponential
respectively.
also
have
an
influence
fracture
after
impact.
damaged
fractures
end
faces
grow
from
isolated
short
fracture,
long
network,
sides
develop
non-penetration
fractures,
penetration
multi-branch
fractures.
This
clarifies
physical
combined
damage
mechanism,
demonstrates
potential
stimulation
uniting
provides
a
theoretical
reference
for
LPSUD.
