overcoming challenging narrow mud weight window of 8-9 april 2014 nh eurobuilding ... malaysia map...

SPE/IADC Managed Pressure Drilling and Underbalanced Operations Conference & Exhibition

8-9 April 2014 NH Eurobuilding Hotel, Madrid

Overcoming Challenging Narrow Mud Weight

Window of 0.35 ppg: Successful MPD & MPC

Application in Offshore Malaysia

- A Case History

1

• Lee Jin Ming, Drilling Engineer / PETRONAS (Presenter)

• Mizuar Omar, Senior Drilling Fluid Engineer / PETRONAS

• Freddy Rojas, MPD Engineering Manager / MISWACO



2

Malaysia Map

TA WELL

Field Location



3

TA Well Background

6” hole

7” liner

9-5/8” csg

While drilling 6” hole:

Fracture: 18.3 ppg

Pore Pressure: 16.7ppg TA Well revisit planned

with MPD applications

2010 m-MD

2090 m-MD

Cementing deemed

impossible, suspended

Planned well TD: 2350 m-MD



4

6” Hole MPD Plan

Shoe DLOT = 18.6 ppg

0.35 ppg!! TD DFIT = 18.17 ppg

PP = 17.82 ppg

Actual Well Results

Worst case

Top kill well



5

16.72

16.72

17.51

17.61

17.7517.76

2,134

2,195

Top F10

Top H01

Top H02

18.60

18.60

7'' liner @2010 m-MDDF2010

2060

2110

2160

2210

2260

2310

2360

16.5 17.0 17.5 18.0 18.5 19.0 19.5

Measu

red D

epth

(m

-MD

DF

)

Equivalent Mud Weight (ppg)

EST. PORE PRESSURE GRADIENT(NOOP) ECD+SBP Surface MW FRACTURE GRAD (ppg) EWM CONN.(ESD+SBP)

TA WELL MPD BASIS OF DESIGN

7" Liner Shoe

Well TD

Top F10 S

Top F10

Top H01

Top H02

2010

2060

2110

2160

2210

2260

2310

2360

16.0 16.5 17.0 17.5 18.0 18.5 19.0 19.5

Measu

red D

epth

(m

-MD

DF

)

Equivalent Mud Weight (ppg)

prognosed PP (ppg) Prognosed FG (ppg) (ppg) ACTUAL FG BASED ON DFIT

Actual PP (ppg) Drilling MW (ppg) ECD + SBP (ppg)

TA WELLMPD PLOT SUMMARY - AFTER TD

PLANNED ACTUAL

Plan Versus Actual of Drilling Phase

0.35ppg



6

6” BHA Tripping Out

• Well was top-killed with

18.3ppg mud at 1200m,

18 ppg EMW @ TD

(50psi overbalance).

TD @ 2350m-MDDF

7" Shoe @ 2010m-MDDF

7" Top of Liner @ 1890m-MDDF

18.3

PPG

16.3

ppg

MW

16.3

ppg

MW

17.9

ppg

16.3

ppg

MW

16.3

ppg

17.9

ppg

TRIP MUD DISPLACEMENT

18

.3 p

pg

17

.9 p

pg



7

4-1/2” Liner Running

7" Shoe @ 2010m-MDDF

TD @ 2350m-MDDF

7" Top of Liner @ 1890m-MDDF

18.3

PPG

17.9

ppg

16.3

ppg

MW

16.3

PPG

16.3

PPG

16.3

ppg

MW

16.3

ppg

MW

16.3

ppg

MW

16.3

ppg

MW

16.3

ppg

MW

17.9

ppg

16.3

ppg

MW

17.9

ppg

1\\\

18.3

ppg

16.3

ppg

MW

16.3

PPG

16.3

PPG

16.3

ppg

MW

16.3

ppg

16.3

ppg

16.3

ppg

17.9

ppg

17.9

ppg

17.9

ppg

16.3

ppg

RUNNING LINER AND UNDERBLANCED FLUID DISPLACEMENTS

17.9

ppg

17.9

ppg

16.3

ppg

RIH Liner to 600m, displace 18.3ppg to 16.3ppg.

RIH SBP = 15psiEnd of Disp. SBP = 112psi


RIH SBP = 112psiEnd of Disp. SBP = 240psi


RIH SBP=240psiEnd of Disp. = 450psi


RIH SBP= 450psi End of Disp. = 650psi



8

4-1/2” Liner Displacement



9

4-1/2” Liner Managed Pressure Cementing (MPC)

Challenges

• Well loss & gain

• Constant bottom hole pressure

• 0.35 ppg pressure window

• Zero human error – communication

• High static underbalance – 640psi



10

Managed Pressure Cementing Plan (without SBP)

FG = 18.5 ppg (as per cementing company simulation,

calibrated to equivalent of 18.17ppg) to the actual

PP = 17.82 ppg.



11

Managed Pressure Cementing Plan (with SBP)

Operating window



12

Actual Managed Pressure Cementing Graph

weighted

spacer Displacement Cement

slurry Wash

spacer



13

• Liner cementing without

gains / losses.

• USIT log result below

previous shoe

Cement Quality



14

Conclusion

• Cementing possible in marginal pressure window.

• MPC success depends on:

◦ Valid hydraulic simulations.

◦ Reliable MPD system.

◦ personnel training, communication protocols & clear

procedures

• Successful MPC set new standard for operator.

• Exploring full MPD utilization:



15

Co-Authors:

Trigunadi Setiawan, Warjanto Saikam, Mohammed Mousa, Sagi V. R Raju,

Ahmad Zahir, W Nor Afiqah, M Abshar B M Noor, Mizuar Omar, PETRONAS;

Freddy Rojas, Andi Eka Prasetia, Dylan Richards, MISWACO

Acknowledgement

PETRONAS

MISWACO

Appreciation

overcoming challenging narrow mud weight window of 8-9 april 2014 nh eurobuilding ... malaysia map...

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