Gii16
AM”
D
.
.
.
Society of Petroleum Engineers
SPE 37020
A Depletion Planning Model for the Development and Management
Gas Fields
Bambang lsmanto, SPE, and Ben Weimer,
Copyr(ght
This
19S6
paper
Soc,ety
was
Conference
of Petroleum
prepared
Adelaide
for
Eng(neers
Auslral!a,
28-31
Indonesia
Inc
Mutiara
at the
presen!allon
SPE,VICO
October
1996
SPE
Asia
Pac#f!c
011 and
Th$s paper
was
corwamed
presented
have
correctmn
posmon
SPE
selected
not been
by the
are
acknowledgment
633636
by an SPE
material
of where
of Petroleum
revmw
not
by Edkforlal
Ihe paper
TX 75083-3836
was
U S A
Papers
Committees
presented
of
reflect
10
of Ihe
majority
af
SocetV
of
mouth
of not more than 300
conta!n
consp,cuo.s
Wile
L(brarmn
SPE
major
gas
by almost
500
geologically
deltaic environment
Planning
developed,
and
implemented
current
compression
requirements
commitments.
DEPLAN
program
linked
organizes
and
principles
volumetric
and
by VICO
Currently,
in these
467
fields
Typical
PARM3
data
using
equations.
The
parameters,
requirement
with the model output
gas deliverability
programs.
schedule
predictions
Since it’s inception
to be a valuable
development
and
sales
designed,
developed,
or single
are
and wells with
Depletion
of these fields.
and explains
to assist
This paper
its’ application
of the Nilam
field.
principles
gas reservoirs
and
projections
engineering
geological,
is a field
and
implemented
to optimize
generates
and operations
field
individual
linked
(PARM)
numerous tables of current and historical
of
simulation
entry screens are provided
reserves
are
producing
input
and generation
priority,
gas
well
and compressor
and
and
over
data.
such
predictions
the evaluation
of
for input of necessary criteria
rate
requirement
prognosis
(demand),
as well
capacities.
presentations
time.
engineering,
data
or facilities
production
programs
gas fields.
for
deliverability
Formatted
and well
options are essentially
has proven
planning.
equations,
for tilming of certain actions, range limitations
of work
management
for
to
database for extraction
combining
schedules
VICO
methodology
to VICO’S
by
as
depletion
depletion
inflow and outflow
is automatically
management
by
data using standard petroleum
volumetric
by combining
DEPLAN
Model
program
and analyze
utilizes
facilitates
in
of various
for completion,
The program
output
of field gas deliverability
addition
DEPLAN’s
well
as parameters
to
required
operational
producing
work
flexibility
scenarios
with
respect to time.
Introduction
Indonesia,
PERTAMINA,
selective
wet I completions
Planning
DEPLAN
The program
The program
DEPLAN
and
was designed by VICO
program
of Depletion
engineering
essentially represented by
in 1990,
multilayered
gas
for gas reservoirs
results
and
drilled
computerized
of development
assemble, organize
and
as necessary.
tool to assist in reservoir
of complex
tool
It assembles,
standard
deliverability
models can be entered into DEPLAN
gas
meet
planning,
dual
with the
channels
been
of reservoirs
the development
The computerized
field management
methodology
well
Description
a
designed,
optimization,
to
have
and
specific
program
in the optimization
vary
Plants. The
gas reservoirs
wells
as dual,
a
describes the DEPLAN
in a
1.5 Bscf/D
Fertilizer
make-up.
was
database,
field depletion
individual
outflow
wellbore
necessary
depletion
These fields
of distributary
reservoir
completions,
in the managing
to assist managing
is a computerized
analyzes
located
and reservoirs,
program
and future
to VICO’S
to optimize
and generates
VICO
in the form
Planning (DEPLAN)
ranging in
and, therefore,
of wells
(DEPLAN)
deliverability.
are
and compositional
of the large number
Depletion
Indonesia
gas reservoirs
reservoirs
in size, permeability,
Because
I).
in Figure 2.
multiple
feet that have been penetrated
These
wells
complex
drastically
field
bars.
completions.
in East Kalimantan,
fields
depth from 4,000 feet to 15,000
The
plant and Kaltim
Because of the large number
contain in excess of 2,000 individual
inflow
LNG
occurring
completed
P O
fax 01-214-952.9435
Abstract
VICO’S
in the Mahakam
(Figure
four fields consist of more than 2,000
any
presented
shown
utilizes
are located
Indonesia
an average daily supply of approximately
to the Bontang
as
and are subpct
necessarlfy
or members
rewew
at the pap-a
Engineers
does
I!S off!cers
Iollowlng
C’.mtenb
to coPy IS reslncfed
to an abstract
be
copied
The
abstracl
Should
and by whcm
Richardson
Commlftee
author(s)
as presented
Engineers
10 pubhcal!on
PermWon
may
not
Program
by the
by the Soctety
The
which
199S
submited
of Pe!roleum
subjecf
Petroleum
Engineers
words
Illuslmt(ons
Em
re.(ewed
author(s)
of the Society
meetings
for presentation
(n an abstracf
and Semberah
delta of East Kalimantan,
Gas
provide
tnformatmn
of Multilayered
as a
Production
Sharing
Contractor
operates four major gas fields; Badak,
to
DEPLAN
Nilam,
523
Special
Features.
Some of the special features of
BAMBANG ISMANTO AND BEN WEIMER
2
the DEPLAN
●
Predict
demand.
model are that it can:
gas production
of existing
and
future
wells
and
●
Automatically
recomplete
dead
wells
into
suitable
zones
●
recompleting,
maximulm
consider
distance
over
specified
which
minimum
rates restrictions.
●Commingle
zones when
minimum
to commingle
necessary
net pays,
zones,
and
to meet minimum
input
production
based on permeability
thickness
(kb)
●
cross-flow
for maximum
can be applied
completions
Limit
maximum
●
rates to tubing
such
systems
pressure (MP,
(high
erosional
velocity
and
pressure
overrides
then
specifying
priority
forcing
specified
specifying
When
(HP,
950
For
water
such
zones
numerical
Oil
simulation
completion
Current reservoir pressure
P Wf
Bottom hole flowing
but the life
period
is
of oil
input
recompletion
zones
into
psi),
medium
n
Back pressure exponent
be
Values
[he
production
are prioritized
recompleted,
1
-)
etc.
results
of
is calculated
to
3,
other
●
Forecast
the following
the required
for
future
Complete
the geological
●
Predict
gas
appropriate
●
Optimize
Identify
work
schedules
to prudently
deplete
Determine
each
(C
which
test analysis.
value
is obtained
from
pressure
C value using production
test rate, known
using
the
kh vs. n correlation.
Cullender
and
Smith
The n
PWf is
method.
By
the gas rate, reservoir pressure, n and P,,(data, the
by solving
the back pressure
not been completed,
determined
Netpay
from
kh
thickness
vs.
(h)
C
the C and n
and
is derived
kh
vs.
from
n
log
(k) is estimated from log derived
porosity
correlations.
to permeability
and exponents
The
back pressure
(C and n) are then determined
from kh to C and kh to n relationships.
Outflow (Tubing Performance).
method
liquid
wellbore
are
analysis and permeability
availability
and
the
tubing
most
is used to calculate
loading and critical
The Cu Ilender & Smith
pressure losses in the tubing. The
rate for each pressure system and
size are determined
from
empirical
Material Balance Equation.
as well as tilming and volume
DEPLAN
balance equation to predict reservoir pressure.
which
could
fields’
optimum
benefit
data
calculated
using Nodal Analysis.
of these wells.
from
incremental
P,= P, *(Z/Z, )*( I -Gp/lGIP))
compression.
●
using
coefficients
reservoirs.
new wells in suitable zones based on
current compression
wells
and exponents
four methods
pressure and the back pressure equation,
correlations,
tasks:
of future requirements.
●
kh
For zones that have
values
to
prognosis.
utilization
industry
using kh vs. C and kh vs. n
C value can be determined
decline rates.
existing
The
Back calculating
knowing
fashion for various scenarios ofi
the predicted
C and n values
calculated
- Gas demand schedules.
●
coefficients
by the following
value is pre-determined
by DEPLAN,
runs can be compared
- Reserve size for the field or individual
Production
uses the
equation.
Tasks. Various DEPLAN
the field in a timely
model
to select the most accurate method first:
Calculating
reservoir
in that well.
each other to perform
and outflow
transient test analysis.
4,
DEPLAN
individual
inflow
Actual C and n obtained from deliverability
correlations.
and this production
allow
for back pressure
and n) are determined
of zones or wells,
not predicted
DEPLAN
generates
pressure
Back pressure coefficient
gas sales requirements,
accept
are
The
Gas rate
programs.
productions
Equation,
c
as: when
can
is below
reservoirs,
program
by combining
different
earlier than scheduled.
influx
The
deliverabilities
to
sandface pressure drawdowns,
production
make recompletion
●
Equations.
P,
100 psi) and very
for certain production
maximum
field
Mechanics
Q
A,
●
wide studies,
where:
wells,
25 psi)) and specific surface networks.
and
terminates
requirements.
Q = C(P,2 - PW;)”
and specified
production
325 psi), low pressure (LP,
low pressure (VLP,
and assist in tubing size
in future recompletion
global Iy or for specific
gas deliverability
pressure
requiring
standard back pressure equation to predict gas rates:
sandface pressure drawdown.
Distribute
. Allow
technology
and zones.
flow
reservoirs
equations. The equations are described below:
wells based on casing size and zone availability.
This feature
satellite manifold
Deliverabili~
as singles, duals and dual selective
●
gas rates and
between layers.
Select tubing sizes and specific completion
and drilled
Identify
Assist in major field and company
completion
zones to be completed
minimum
●
●
Basic
and pressures.
●Optimize
by identifying
drainage.
Screen wells with tubing restrictions
DEPLAN
rates.
●Allocate
reserve depletion
selection for existing and future completions.
based on specified criteria.
. When
Manage
additional
forecast condensate rates based on predicted gas rates.
●
SPE 37020
share of total
where:
gas sales
524
uses the material
A DEPLETION PLANNING MODEL FOR THE DEVELOPMENT
SPE 37020
P,
Current
P,
Initial reservoir
reservoir
z
z,
Current gas compressibility
Gp
Cumulative
IGIP
Initial gas in place
AND MANAGEMENT OF MULTILAYERED
and monobore),
pressure
4,
factor
is
Compression
initial
consists
mathematical
gas
determination
Other
of reservoir
Equations.
compressibi Iity
factors
Purvis and Robinson
Standing-Katz
Condensate
of
various
plot
the
The
reproduces
from empirical
yield
completions
and
The
system
PARM
relational
Reserves
is an
the
operations
integrated
computerized
important
tool
application
software,
to
and
(PARM)
database,
mechanical
database
provide
is
data.
systems
by
and History Matching.
built
well
is
estimated
Flowing
from
the
bottom
pressure
outside
value
falls
on a
generated.
This
data
pressures are compared
of the model
the back
pressure
coefficient
predictions.
(C)
calculation
differences
Pressure
revisions
are
can
discrepancies
predicted.
be
made
between
if
there
DEPLAN
Gas well
of the completions
the highest.
systems
the accuracy
Adjustments
in
are calculated.
adjustments
are
significant
history
match
fu II,
enter
which are summarized
il.
are categorized
into two
reserves, well downtime,
2,
Recompletion
minimum
rate
or dual selective)
reserves/deliverability
(R/D)
Drilling
- type of well and completion
flowing
for
programs
such
Therefore,
the
If
can not produce
will
will
a lower
If a
into the
be shut-in
keep producing
The summation
volume
calculations
as
simply
through
of all of the rates
into one specific
downtime
pressure
production
calculations
by the amount
525
head
system is
all completions
pressured
pressure
of volume
system,
for the field.
each rate in each system
factor.
Downtime
surveys,
calculations
with downtime
system
feeds
occupied
work
maintenance,
are
is
factors are
from physical
similar
etc.
to
the
reduced rates.
a higher
system, the higher pressured system capacity
(conventional
tubing
the highest pressure, until they die in
each
by specified
deliverability
completion.
3.
lowest
used to allow for shut-in periods resulting
of
to
into the low pressure
the lowest pressured
Completions
For production
reduced
run period.
type
the
systems capacities,
are exhausted or all systems are full,
of all completions,
commingling,
first accepts all
pressure system can not accommodate
results in a deliverability
size to be completed,
(single, dual completion
minimum
for
produced
When
the lowest pressure system.
groups
net pay, minimum
and DEPLAN
minimum
reservoir
completion
and
-
are then
system and progressing
next level of pressure, the completion
actual
Criieria. Input criteria includes the following:
rate, minimum
through
gas rate is
and wells
DEPLAN
and the lower pressure completions
pressure
in Figure 3:
1. General - minimum
predicted
pressure system based on specific
on
first.
each system, starting in
inputs
The resultant surface
and the final
calculations,
based
for that time step.
DEPLAN
bottom
This iteration continues until a
the program begins to fill the next higher pressure system
lower
reserve
and
of actual
that have been forced into certain pressure
until all completions
gas rate
or
[f the surface
range
assumes another flowing
The completions
pressure (FTHP)
(n) can be
if significant
(P/Z)
is then estimated
of a specified
rates are combined
For deliverability
for
values.
Inputs.
reservoir
balance
criteria, to meet a given gas demand.
gas rates and
and exponent
made to the deliverability
illustrates
systems, then it begins to fill the remaining
to actual data to calibrate
to ensure realistic
which
pressure are then “in-balance”
calculations,
for all
outflow
Predicted
material
surface pressure is achieved.
produced to the appropriate
to be an
up-to-date
flow
4.
hole pressure
pressure
and
sketch
in Figure
and rate and surface
tubing
reservoir,
data.
Predicted
into
Calculation
are calculated
inflow
wellbore
is shown
starting with the lowest pressured
Calibration
data. Results
Production
combining
A simplified
pressure and reservoir
DEPLAN.
including
into
reservoir,
can also be entered
pressure
and
surface pressure, the program
System.
has been proven
necessary
petrophysical,
studies
Deliverability
equations.
is based on
database system, that handles geological,
production,
database
directly
test and completion
hole pressure and recalculates.
integrated
order of
linked
retrieved
Gas rates for each completion
pressure
data.
Monitoring
The
input
DEPLAN
Process.
satisfactory
Production
well
simulation
this calculation
using the Dranchuck,
condensate
future
of
geological,
pressure,
reservoir
calculations,
gas
The condensate production
historical
for
pressure and priority
Locating
allows
correlation.
that effectively
charts.
the
of
DEPLAN
pressure and temperature
Standing’s
production
from
types
including
production,
pressure at that point in time.
method
on
equations derived
the
are calculated
Z-factor
based
a P/Z plot.
on
Pseudo-critical
using
calculated
constructs
plot.
pressure and
reserve table in
from the
production
calculated
a P/Z
for
equation
gas in place, reservoir
and mathematically
cumulative
are
initial
for every reservoir
Z-factor
PARM
the
the
- volume,
b. PARM database linked inputs.
gas production
retrieves
and location
wells being compressed.
factor
DEPLAN
This
sequence of drilling
3
the wells.
pressure
Initial gas compressibility
DEPLAN
GAS FIELDS
pressured
wi II be reduced
by the lower
pressured
4
BAMBANG ISMANTO AND BEN WEIMER
systems.
Different
pressured
systems
can
be modelled
in
DEPLAN
tandem.
Recompletion
producing
and
Commingling,
cease
Are forced by the DEPLAN
Reach the assigned abandonment
determine
engineer to no longer produce.
. No longer have remaining
DEPLAN
potential
gas
with
Zones
are
the recompletion
drilling
rejected
in order to
as recompletion
deliverability
(IUD)
ratio
is less than
a
Predicted
rate
limit,
based
for
on
is below
the
an
assigned
future
same
zone
back
completions
pressure
values for C and n and reservoir
steps
as described
are
from
by DEPLAN
production
Zones
before.
estimated
constructed
are calculated
material
pressures,
drilling
P/Z
●
Until a maximum
for
commingled
in Nilam.
significant
interval.
an additional
recalculated.
Specific
can be applied globally
program
was
performed
No compression
was performed
drilling
tubing
To
restrictions
long
period
that
identify
of time,
and long term evaluation
produce
DEPLAN
From
7 completions
were
the
identified
the minimum
would be accelerated.
of the wells
As shown
size
drilling
or for specific wells, completions
and
ultimately
in Figure
wells
the base program
The
tubing
will
change
out
change
from
are stored
to prepare
most
frequently
deliverability,
used
outputs
work programs,
and deliverability
in relational
include
forecasts
production,
with production
well or zone.
be transferred
Excel
Progressive
most
popular
reservoir
Query
including
pressure,
recompletion
Language
cumulative
be reduced
was
daily
not built into DEPLAN,
that
will
Results.
production,
reserves,
compression
wells.
remaining
per
month,
Economic
the
financial
number
calculations
available
merits
the
first
by 50 MMscf/D
Sensitivity
compression
in year
to
was reduced
in year
were
increase
the deliverability,
to be drilled
compression
runs
by adding 325 psi
the
the number of
again.
3 and 45
10 reduced the number
of
Adding
90
MMscf/D
wells
of
to be
drilled by 16.
with the
but data is readily
show
of
compression
charts by
(MP)
By increasing
required
MMscf/D
interfacing.
output tables and can be easily linked to a specified
program
wells
Optimization.
pressure
values are also calculated
averages
and drilled
I-2-3
defer
by 2 drilling
implemented
after the tubing size optimization
deliverability.
Output results can
or Lotus
(GQL)
suction
A list
The outputs can also
be presented by completion,
using Graphical
Compression
performed
to
reserves,
systems.
out will
as predicted.
Some
related
remaining
by pressure
of output options is shown in Figure 6.
to Microsoft
database
various reports.
productive
year 2 to year 4, and
quarter of 1996 and increased deliverability
results
This will also
to shallower
8, the tubing
of 3 deliverability
wells.
Output
tubing
gas rates would
increase and production
and tubing
zones.
Outputs.
was
of all
zones.
zone is added and the rates are
tables that can be retrieved
a
as optimum
If 2-3/8”
accelerate
recompletion
analysis
the screening
was replaced with 3- I /2” tubing, the predicted
is reached.
with
over
was used for
and Nodal
wells,
rate calculations.
the wells
would
for a tubing change out program.
for
optimizing
in this case. As shown
completed
types of completions
by
wells and 99 recompletion
candidates
calculated
program
was added and no
criteria requirements.
If the rates are below
requirements,
model was used
and development
used for initial
is
100
of 90 MMscf/D
The DEPLAN
of the wel I are selected to be
pressure
units of
as follows.
unreasonably
rate is achieved.
system
the capacity
Tubing Size Optimization.
equation
5) based on the cumulative
specified distance interval
each
and are
would be required to meet gas demand with this scenario.
together:
Until a specified minimum
and 2 compression
with
and recompletion.
screening
●
in this field
with
in Figure 7, 87 additional
at that time.
lf they meet the recompletion
MMscf/D.
Five
tubing sim optimization
balance
but with new
C’s and n’s are
individual
(Figure
for each completion
commingled
rate
and
Indonesia
750
Base Case. Under a specific gas sales assumption, a base
field
Pressures for subsequent time
the
●
A
or
in VICO
about
have been drilled
the future production
requirements
minimum
used for rates of existing completions
calculated
methodology
units having 325 psi suction pressure (MP)
case development
these
is a
tool to
or single completions.
have been installed
to” optimize
economic
of
as duals, dual selective
psi suction pressure (LP)
over
The following
as a technical
and production
deliverability
the capacity of 225 MMscf/D
. Reserves or net pay are below an assigned minimum.
equations
gas
compression
specified time.
Rates
optimization
166 wells
completed
candidates if
●
using DEPLAN
is the second largest gas field
current
Currently,
then evaluates
wells and additional
demand.
Reserves
example
wellbore
Nilam
rate or liquid load up rate.
reserves.
program
for existing
field
over a specified period of time.
●
The
Completions
when they:
●
●
Application
Nilam Field Development Optimization.
Niiam
meet
SPE 37020
of
profile
grouped
are
Using
the
compression
from the
optimum
drilling,
by pressure system
DEPLAN
reduced
model
to
the future
wells and reduced recompletion
economic
of
An
saving of approximately
various
scenarios.
526
recompletion
and
scenario is shown in Figure 9, The deliverability
$60
is shown
optimize
drilling
in Figure
tubing
requirements
by 5, a significant
million.
size
by
10,
and
18
financial
SPE 37020
A DEPLETION
PLANNING
MODEL
FOR THE DEVELOPMENT
Conclusions
1. The DEPLAN
program
is a proven
reservoir and well management
7-. DEPLAN,
linked
as a computerized
to
VICO’S
efficiently
standard
organizes
engineering
principles.
planning.
of various production,
and sensitivities
DEPLAN
VICO
produces
facilitates
credible
to optimize
the evaluation
and reserves scenarios
with respect to time.
is especially
applicable
to VICO
of data associated
fields because
with the numerous
reservoirs and wells.
To handle water influx reservoirs
oil
rim,
model
the
reservoir
6,
flexibility
and
data using
accuracy,
deliverability
of the large volume
5
It
field depletion
operational
program,
effectively
and analyzes
data and engineering
tool for
gas fields.
management
database,
results, within
3. DEPLAN’s
4,
field
PARM
assembles,
and reliable
in multilayered
can
or gas reservoirs with an
accept
results
from
numerical
sitnulators.
Use of DEPLAN
has helped
have resulted in significant
identify
financial
opportunities
that
savings for VICO.
Acknowledgment
The
authors thank the management
well as the Indonesian
BPPKA
Joint Venture
for their permission
of VICO
(IJV)
to publish
would like to thank Glen Rennie, Gerald
for
their
helpful
review
and
Indonesia
as
and PERTAMINAthis paper.
We also
Long and Mike
discussions
during
Haas
the paper
preparation.
References
1
VICO
-)
-.
lsmanto.
3.
Rcnnic.
Rcscrvcs
R., Dyer, G., Wcimer.
optimization
lnwrnal
l{.(;
of
Tubing
)
Manual.”
E. B.: “Nilam
Restricted
Wells,”
Field;
1995,
Documentation.
., Senduk,
Monitoring
R..
(l’ARM)
I’abalujan,
System,””
presented at the 19X8( 7th) Offshore
I’cbruilry
(DEPLAN
Documentation.
D., (;unawan
Production
VICO
Planning
Indonesia:’’[)cplelion
1991. Internal
}1.:”
paper
Production
OSEA
and
88173
South East Asia Conference,
2-5,
527
AND MANAGEMENT
OF MULTltAYERED
GAS FIELDS
5
BAMBANG
ISMANTO
AND BEN WEIMER
N
%
Fig. 1-
Location
Sepinggan
Map of Mahakam
528
Delta Area
SPE37020
SPE 37020
Well A
,...,,..,.,
A DEPLETION
PIANNING
MODEL
FOR THE DEVELOPMENT
AND MANAGEMENT
Fig. 2- Typical
b.ntcr
Reservoirs
GAS FIELDS
Well C
(Future well)
Well B
T.bm:
OF MULTILAYERED
and Completions
7
BAMBANG
8
ISMANTO
AND BEN WEIMER
SPE 37020
n
User
v
)
- Data Preparation
- Data Check
- Run Criteria
PARM Database
r
I
Model
Calibration
Reserves
Data*
Basic and
Time Step Criteria
I
EEl
Production, Well
Test and Pressure
Data*
Drilling and
Recompletion
Criteria
Completion
Data’
Criteria
output:
C&q‘EEl
—-IzIEEE3
* Linked
to PARM Database
Fig. 3- DEPLAN
530
Flow Process
Diagram
SPE 37020
A DEPLETION
PLANNING
MODEL
FOR THE DEVELOPMENT
AND MANAGEMENT
OF MULTILAYERED
Production
GAS FIELDS
Systems
~—
D
r
wh
~’
QHP
QMP
QLP
QVLP
m
GAS
Fig. 4- Simplified
DEPLAN
Wellbore
RESERVOIR
Schematic
4
PJZ
INITIA [. (;IP
(ip
Cumulative
Production
Fig. 5- P/Z vs. Cumulative
531
Production
9
10
BAMBANG
I
Output
ISMANTO
SPE 37020
AND BEN WEIMER
output
Option
Description
Basic criteria
Field deliverability, demand and work program vs. time
Field deliverability by pressure system vs. time
Field production vs. time
Deliverability by wells and completion
Production by wells and completions
Remaining reserves vs time
Production by reservoirs
Reservesldeliverability (R/D) versus time
Reservoir pressure versus time
Cumulative production/initial recoverable reserves(lRR) versus time
Summary of well condition by well, completion
Summary of well condition by reservoirs
Producing wells in the reservoir
Wells waiting on compression
Wells drilled and recompleted versus time
Well system pressure vs. time
Summary of initial rate and cumulative production of drilling and recompletion
Summary of data check results
Fig. 6- List of DEPLAN
Outputs
Total Crilling :
Ill
ti
10
llms
-
Mm o
Fig. 7- Forecasted
Wmlko.m
Deliverability
532
Table
Chart/Table
Chart/Table
Charitable
Table
Table
Table
Table
Table
Table
Table
Table
Table
Table
Table
Table
Table
Table
Table
II
(w)
+Ati
!Jv —WChd
and Work
Program
(Base Case)
~
SPE 37020
A DEPLETION
PLANNING
MODEL
FOR THE DEVELOPMENT
Ill
Fig. 8- Forecasted
Deliverability
AND MANAGEMENT
II
OF MULTILAYERED
Total
Orlllhw:
Total
Recompletion
85
97
J_b
!2
,1
and Work Program
14
,5
1(>
after Tubing
17
lx
Total
D
IY
Size Optimization
Tots! orming :
%
GAS FIELDS
RacomPletiorIs
69
:
M
.
Fia.
9- Forecasted
Deliverability
and Work Program
O~timization (Optimum Case)
533
after Tubing
Size , Drilling
and Compression
?11
11
BAMBANG
12
ISMANTO
AND BEN WEIMER
14
12
02
00
Fig. -10: Forecasted deliverability by pressure system for optimum case. The deliverability is grouped into
high (HP, 950 psi), medium (MP, 325 psi), low (LP, 100 psi) and very low (VLP, 25 psi) pressure systems.
534
SPE 37020