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22 Φεβ 2014 (πριν από 3 χρόνια και 10 μήνες)

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Stimulation Fluids

Case Histories

Dulang

B
-
12 Stimulations
with

KO Plus LO + HDC MK II

CHALLENGE/RESULT



Production drop to 0
bbls
/d liquid for 2 years.



Suspected massive damage from Barite sedimentation



Inaccessible other two zones due to mechanical issue.



SOLUTION : Stimulations with
Ko

Plus + HDC MK II



RESULT :
Production increased to 813
bbls
/d liquid 82% WC.



Prod Tech in charge


Shaliheen

M
Hatta



HDC MK II

Displacement fluid

BULLHEADING SIMULATION

Ko Plus LO

Spacer fluid

Spacer Ahead

Spacer Fluid

Displacement fluid

Ko Plus LO

HDC MK II

Plug (isolation)

Tembungo A09
Stimulations with

KO Plus LO + HDC MK II

CHALLENGE/RESULT



Production drop to 120
bbls
/d liquid from 550
bbls

liquid



Suspected massive damage from LCM during
workover

in 2008



Inaccessible thru tubing suspected scale build up
downhole
. Pumped
thru annulus.



SOLUTION : Stimulations with
Ko

Plus + HDC MK II/POOH ESP



RESULT :
Production increased to 1000
bbls
/d liquid 70% WC.



Prod Tech in Charge


Zadil

Hayat &
Hasmiza

Bakar


** LCM : Loss Circulation Material

HDC MK II

Displacement fluid

BULLHEADING SIMULATION
thru Annulus

Ko Plus LO

Spacer fluid

Spacer Ahead

Spacer Fluid

Displacement fluid

Ko Plus LO

HDC MK II

ESP

Tembungo

A08
Stimulations
with

KO Plus LO + HDC MK II

CHALLENGE/RESULT



Production drop to ~40
bbls
/d liquid



Suspected massive damage from LCM during
workover

in 2008



After stimulation, unable to retrieve plug due to debris found on top
of plug.



SOLUTION : Stimulations with
Ko

Plus + HDC MK II/Fishing



RESULT :
Production increased to 968
bbls
/d liquid 5.43% WC.



After
wireline

fishing, debris found to be part of
competion

accessories. And successfully retrieved plug.


Prod Tech in Charge


Zadil

Hayat &
Hasmiza

Bakar



** LCM : Loss Circulation Material

HDC MK II

Displacement fluid

BULLHEADING SIMULATION

Ko Plus LO

Spacer fluid

Spacer Ahead

Spacer Fluid

Displacement fluid

Ko Plus LO

HDC MK II

Plug (isolation)

Spacer fluid

Loss Circulation

&

Water Shut Off

Solution

Fast Set Silicate


LCM



Is a loss circulate material (LCM) to reduce injectivity
temporarily.



Able to reduce significant losses while injecting shutting
off material (fluid) and allow the treatment fluid to set
permanently.


Applied when pumping operations experiencing
significant loss. (typically 2.5 bpm and above and very low
injecting pressure or under vacuum conditions)

Fast Set Silicate


Case History



Baronia 23, SKO, PCSB



Well injectivity was over 5 bpm at vacuum conditions.



50 bbls of Fast Set Silicate was bull headed and brought
down injectivity to 1 bpm at 500 psi.


This permitted the planned well interventions to shut off
the intended zone to be continued.


The lost circulation zone (water producing) was properly
shut off.

Water Off Gel 1


WOG1



Is a long lasting permanent plug for water shut off.



It is low viscosity, solids free and self activating gel.



It is rigid and dimensionally stable and in liquid form, it
can penetrate into narrow fracture.



Forms a stable, permanent plug. It can be used as a
permanent water shut off material.


Water Off Gel 1


WOG1

1.

WOG1 consist of 4 components


water, sodium silicate,
urea based compound and glyoxol based activator.


2. When the glyoxol based activator is added in at certain
concentration, it will caused a polymerization process that
transform it from liquid stage into solid stage.


3. It creates a solid gel downhole and can withstand
compressive differential pressure between 1500


2000 psi.


Benefits of WOG1

1.
Easy to mix and pump. Self activating forming a
homogenous gel.

2.
Suitable for plugging pores, small fractures in deep narrow
fractures or channel.

3.
Suitable for zone abandonment. Hardening time can be
adjusted by manipulating additives concentration.

4.
Does not contain extremely hazardous substances.

WOG1 vs Cement Plug

WOG1 Temperature Sensitivity Analysis

Temperature sensitive only to determine amount of activator needed.
The


higher the temperature, the lower activator needed to make the gel
set






WOG1 Case History

Baronia 23, SKO, PCSB


1.
Shut off Zone is RM 3.2, depth 6855


6889 ft. (34
ft
)

2.
During
injectivity

test, well was found to be in vacuum
condition and loss circulation material was used to lower
down
injectivity

rate.

3.
WOG1 was then displaced to cover 5
ft

radial penetration
and left
downhole

to set.

4.
After setting time,
hydrotest

was performed and the
permanently set pill held pressure above 300 psi for
duration of the test.

5.
After 6 months the well still production at 1000
bbl
/d at 0%
WC


Prod Tech in Charge


Ibrahim
Subari


Fresh
Water

WOG 1

BULLHEADING SIMULATION

Heavy Brine

Spacer Ahead

Fresh Water

Contaminant Gel

Fresh
Water

Heavy brine 9.69
ppg KCL

Fresh Water

Spacer Ahead

WOG 1

Contaminant Gel

Fresh Water

Helps to divert
WOG 1

To displace fluid in tubing
and surface line

To avoid contamination of
WOG 1

To ensure residual of WOG 1
left behind will not set