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.
Discover Geoscience,
Journal Year:
2024,
Volume and Issue:
2(1)
Published: May 16, 2024
Abstract
This
study
uses
a
thorough
grain
size
analysis
approach
to
the
depositional
environment
in
Thamirabarani
River
basin,
specifically
Srivaikundam
district
of
Tamil
Nadu,
India.
There
is
significant
lack
research
on
settings
and
sediment
features
unique
even
though
there
have
been
numerous
sediments
studies
conducted
other
river
basins.
Consequently,
purpose
this
investigate
habitats
characteristics
area.
The
majority
18
samples
were
determined
be
medium-
fine-grained
poorly
sort-able
after
extensive
using
granulometric
sieve
methods.
low-energy
formation
process
took
place
largely
or
very
sandy
soil,
as
indicated
by
platykurtic
mesokurtic
morphologies.
within
region
can
better
understood
classifying
soil
based
ternary
plots
clay,
silt,
sand,
such
particle
distribution
curve.
Furthermore,
comparison
with
unified
classification
chart
aids
further
categorizing
types.
Soils
classified
different
landscapes,
rivers,
estuaries,
beaches,
aeolian
terrains,
use
comprehensive
study.
Another
interesting
aspect
basin
movement
deposition
slow
breakdown
rocks,
especially
feldspar
quartz,
they
move
through
rivers
streams.
Journal of Marine Science and Engineering,
Journal Year:
2023,
Volume and Issue:
11(5), P. 1019 - 1019
Published: May 10, 2023
The
current
study
uses
an
integrated
lithofacies,
optical
microscopy,
and
scanning
electron
microscopy
(SEM)
analysis
to
investigate
the
sedimentary
processes,
depositional
architecture,
reservoir
rock
potential
of
Tredian
Formation’s
(Mid-Triassic)
mixed
siliciclastic
carbonate
succession
in
Salt
Trans-Indus
Ranges.
formation
has
been
divided
litho-stratigraphically
into
two
components:
lower
Landa
Member,
which
consists
fine-grained
sandstone
shale,
upper
Khatkiara
coarse-grained
sandstone.
Based
on
structures
lithology,
four
distinct
types
lithofacies
are
identified.
Two
representing
sandstones
interbedded
with
shale
(LF1)
thick-bedded
(LF2)
suggestive
fluvio-deltaic
settings
among
them.
Another
thin-bedded
(LF3)
dolomite
(LF4)
suggest
a
tidal
flat
environment,
correspondingly.
petrographic
examination
indicates
lithology
ranging
from
sub-feldspathic
arenite
feldspathic
moderate
packing.
presence
primary
calcite
cement,
silica
iron
oxide/hydroxide
cements
were
shown
by
diagenetic
investigation,
was
supported
SEM
studies.
In
addition,
secondary
include
ferroan-dolomite,
chlorite,
illite,
is
linked
chemical
alteration
unstable
grains.
paragenetic
sequence
depicts
evolution
early
late
phases.
quality
LF1
LF4
destroyed
early-stage
cementation,
but
LF2
LF3
have
strong
owing
scarcity
dissolution
feldspar
grains,
grain
fracture.
Journal of Marine Science and Engineering,
Journal Year:
2023,
Volume and Issue:
11(6), P. 1230 - 1230
Published: June 15, 2023
This
study
presents
a
thorough
analysis
of
the
sedimentology,
diagenesis,
and
sequence
stratigraphy
Middle
Jurassic
Samana
Suk
Formation
in
Hazara
Basin
northern
Pakistan.
Focusing
on
two
sections,
namely
Mera
Rehmat
Por
Miana,
research
aims
to
unravel
complex
geological
processes
within
formation.
The
examination
microfacies
reveals
nine
distinct
depositional
textures,
ranging
from
mudstone
wackestone,
packstone,
grainstone,
indicating
various
inner
ramp
environments
such
as
open
marine,
lagoon,
coastal
settings.
Petrographic
investigations
shed
light
diagenetic
processes,
including
micritization,
cementation,
dissolution,
compaction,
neomorphism,
dolomitization.
Six
cementation
types
are
identified,
dolomitization
patterns
vary,
providing
insights
into
lagoonal
replacement.
Sequence
stratigraphic
uncovers
intriguing
Formation.
high-stand
system
tract
is
characterized
by
mudstones,
pelloidal
grainstones,
dolomitized
periods
high
sea
level.
In
contrast,
transgressive
displays
ooidal
packstones,
pel-bioclastic
representing
transgression
inundation
previously
exposed
areas.
A
significant
finding
impact
diagenesis
reservoir
quality
parameters,
specifically
porosity,
permeability.
Diagenetic
types,
have
significantly
altered
pore
network,
highlighting
importance
considering
assessing
hydrocarbon
reservoir.
provides
comprehensive
understanding
findings
contribute
our
knowledge
similar
carbonate
reservoirs
globally,
enhancing
exploration
development
resources
comparable
environments.
