Journal of Marine Science and Engineering,
Journal Year:
2025,
Volume and Issue:
13(3), P. 597 - 597
Published: March 18, 2025
China’s
offshore
heavy
oil
resources
are
abundant
but
underutilized.
Circulating
steam
stimulation
enhances
production
while
increasing
casing
failure
risks
in
thermal
recovery
wells.
Accurately
assessing
performance
after
repeated
cycles
is
crucial
for
ensuring
wellbore
integrity.
This
paper
presents
tensile
and
creep
experiments
on
TP110H
under
cyclic
temperatures.
The
temperature
distribution
within
the
“casing-cement
sheath-stratum”
system
derived
using
heat
transfer
theory.
Stress
displacement
equations
established
based
thick-walled
cylinder
theory
thermo-elasticity.
Thermal
coupling
analysis
assesses
stress
straight,
inclined,
sidetrack
well
sections.
Key
factors,
including
injection
pressure,
situ
stress,
cement
modulus,
prestress,
analyzed
their
effects
cumulative
strain
below
packer.
Strain-based
methods
evaluate
safety.
Results
show
that
cycling
at
350
°C,
16
cycles,
casing’s
elastic
yield
strength,
strength
decrease
by
15.3%,
13.1%,
10.1%,
respectively,
rate
increases
16.0%.
Above
packer,
remains
safe,
lower
section
may
be
risk.
Using
low-elasticity
cement,
higher
prestressing
can
help
improve
performance.
study
provides
guidance
enhancing
safety
optimizing
parameters.
Geothermics,
Journal Year:
2024,
Volume and Issue:
122, P. 103081 - 103081
Published: June 27, 2024
Geothermal
energy
could
play
a
pivotal
role
in
decarbonisation
as
it
can
provide
clean,
constant
base-load
which
is
weather
independent.
With
growing
demand
for
clean
and
improved
security,
geothermal
resources
must
be
quantified
to
reduce
exploration
risk.
This
study
aims
quantify
the
untapped
resource-potential
of
Cornubian
Batholith
resource
power
generation
direct
heat
use.
Recent
field
work,
laboratory
measurements
petrophysical
characterization
provides
newly
compiled
dataset
inclusive
subsurface
samples
taken
from
production
well
United
Downs
Deep
Power
Project.
Deterministic
probabilistic
calculations
are
undertaken
evaluate
the:
total
place,
recoverable
resource,
technical
potential
carbon
savings.
The
considered
petrothermal
system
may
require
stimulation
an
enhanced
system.
shows
batholith
has
significant
stored
8988
EJ
(P50),
corresponding
366
556
GWth.
When
evaluating
(i.e.,
electricity)
P50
31
GWe.
savings
when
generating
electricity
(P50)
equates
106
Mt.
Energies,
Journal Year:
2024,
Volume and Issue:
17(14), P. 3569 - 3569
Published: July 20, 2024
Geothermal
energy,
being
a
clean
energy
source,
has
immense
potential,
and
accurate
wellbore
modeling
is
crucial
for
optimizing
the
drilling
process
ensuring
safety.
This
paper
presents
novel
geothermal
model
based
on
drift-flux
approach,
tested
under
three
different
temperature
pressure
well
conditions.
The
proposed
integrates
conservation
equations
of
mass,
momentum,
incorporating
gas–liquid
two-phase
flow
heat
transfer
model.
key
features
include
handling
between
formation
wellbore,
addressing
slip
relationship
gas
liquid
phases,
accounting
friction.
nonlinear
are
discretized
using
finite
difference
method,
highly
system
solved
Newton–Raphson
method.
numerical
simulation,
validation,
comparison
with
existing
models
demonstrate
enhanced
accuracy
this
In
our
tests,
achieved
high
in
calculating
bottom-hole
temperature,
mean
relative
errors
(MREs)
significantly
lower
than
those
other
models.
For
example,
MREs
Rongxi
area
Xiongan,
calculated
by
model,
1.491%
1.323%,
respectively.
These
results
offer
valuable
insights
parameters
Comparisons
indicate
that
approach
outperforms
others
capturing
complex
dynamics
wellbores,
making
it
superior
tool
development.
