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IADC WellCAP Well Control Worksheet Surface Stack - Wait and Weight Method Well Name: ____________________________ Completed By: ___________________________ Date: _____ / _____ / _____

PRE-RECORDED INFORMATION TRUE PUMP OUTPUT: ___________

x ___________ = ___________

Bbls/Stk @ 100%

% Efficiency

CURRENT WELL DATA

TPO (Bbls/ Stk)

PRESENT MUD: DRILL STRING CAPACITY: ________

________

Weight (lb/ft)

Bbls/ft

Drill #2: ________ Pipe Size (in.)

________

________

Weight (lb/ft)

Bbls/ft

HWDP : ________

________

________

Weight (lb/ft)

Bbls/ft

Drill #1: ________ Collars Size (in.)

________

________

Weight (lb/ft)

Bbls/ft

Drill #2: ________ Collars Size (in.)

________

________

Weight (lb/ft)

Bbls/ft

Surface : ________ Line Size (in.)

________

________

Weight (lb/ft)

Bbls/ft

Size (in.)

x

________

=

Length (ft)

x

________

=

________

=

________

=

________

________ Bbls

=

________ Bbls DC

________ Length (ft)

________ Bbls

DC

Length (ft)

x

________ Bbls

HWDP

Length (ft)

x

Stks/min Pressure(psi) Bbl/min Pressure(psi)

DP

Length (ft)

x

=

________ Bbls

÷

psi

SPM

Pump #2: __________ @ __________ psi

SPM

Pump #3: __________ @ __________ psi

SPM

CASING DATA: CASING

_______ , _______ , _______ size

ID

__________________

CASING SHOE DEPTH

Total Drill String Capacity (Bbls)

SHOE TEST DATA:

weight

feet

_________ Depth #1

______________

Total Drill String Capacity (Bbls)

Pump #1: __________ @ __________

SL

STROKES, SURFACE TO BIT: __________________

SCR taken @ _______________ (ft)

DP

Length (ft)

x

SLOW CIRCULATION RATE (SCR): ________ Bbls Pump #3 Pump #2 Pump #1

Drill #1: ________ Pipe Size (in.)

ppg

=

True Pump Output (Bbls/Stk)

______________ Strokes, Surface to Bit

_________ @ Test MW of _________ (psi)

(ppg)

_________ Depth #2

_________ @ Test MW of _________

ANNULAR CAPACITY:

(psi)

(ppg)

________ Bbls/ft x ________ ft = ________ Bbls

_________

Between Liner #1 and DP:

________ Bbls/ft x ________ ft = ________ Bbls

_________ @ Test MW of _________

Between Liner #2 and DP:

________ Bbls/ft x ________ ft = ________ Bbls

LINER #1 _______ , _______ , _______

Between OH and DP/HWDP: ________ Bbls/ft x ________ ft = ________ Bbls

LINER #2 _______ , _______ , _______

Between CSG and DP:

Depth #3 (psi)

(ppg)

size

ID

size

Between OH and DC:

________ Bbls/ft x ________ ft = ________ Bbls

STROKES, BIT TO SHOE: __________________

÷

______________

Open Hole Annular Vol. (Bbls)

=

True Pump Output (Bbls/Stk)

______________ Strokes, Bit to Shoe

STROKES, BIT TO SURFACE: __________________

÷

Total Annular Volume (Bbls)

______________

=

True Pump Output (Bbls/Stk)

______________ Strokes, Bit to Surface

ID

weight weight

LINER #1 TOP DEPTH

feet

LINER #2 TOP DEPTH

feet

LINER #1 SHOE DEPTH

feet

LINER #2 SHOE DEPTH

feet

TVD CASING or LINER

feet

HOLE DATA: SIZE (bit size)

inches

TOTAL STROKES, SURFACE TO SURFACE: __________________ Strokes, Surface to Bit

+

______________ Strokes, Bit to Surface

=

TOTAL DEPTH (MD)

feet

TOTAL DEPTH (TVD)

feet

______________ Strokes, Surface to Surface

MAXIMUM ALLOWABLE ANNULUS SURFACE PRESSURE (MAASP)

( ___________________ - _______________ ) x 0.052 x _________________ = Max. MW from Shoe Test (ppg)

Present Mud Weight (ppg)

___________ psi

True Vertical Depth Shoe (ft)

MAXIMUM ALLOWABLE ANNULUS SURFACE PRESSURE (MAASP) WITH KILL MUD

( ___________________ - _______________ ) x 0.052 x _________________ = Max. MW from Shoe Test (ppg)

Kill Mud Weight (ppg)

MAASP

___________ psi

MAASP WITH KILL MUD

True Vertical Depth Shoe (ft)

DISCLAIMER: This Well Control Worksheet is intended solely for the use of the IADC and IADC accredited schools and organizations engaging in the teaching of the IADC WellCAP Well Control classes. The IADC, its employees or others acting on its behalf, makes no warranties or guarantees expressed, implied or statutory, as to any matter whatsoever, with respect to the use of this Well Control Worksheet.

Field Units (psi, ft, ppg)

Rev 01/12/06 Page 1

KICK DATA SIDPP: __________ psi

SICP: __________ psi

PIT GAIN: __________ Bbls

Time of Incident: ____ : ____

CALCULATIONS KILL MUD WEIGHT (KMW)

( ______________ ÷ 0.052 ÷ _______________ ) + _______________ = ___________ ppg SIDPP (psi)

True Vertical Depth (ft)

Present Mud Weight (ppg)

INITIAL CIRCULATING PRESSURE (ICP) _____________________________

+

SIDPP (psi)

KILL MUD WEIGHT

____________________________

=

INITIAL CIRCULATING PRESSURE ___________ psi

=

___________ psi

Pump Pressure (psi) @ SCR of _______SPM

FINAL CIRCULATING PRESSURE (FCP)

__________________________ Pump Pressure (psi) @ SCR of _______SPM

x

______________ Kill Mud Weight (ppg)

÷

______________

FINAL CIRCULATING PRESSURE

Present Mud Weight (ppg)

PRESSURE CHART Theoretical Drill Pipe Pressure

Stroke or Volume SURFACE

BIT

Strokes Surface to Bit

Actual Casing Pressure

Actual Pit Volume Deviation

ICP

0

_____________

Actual Drill Pipe Pressure

FCP

÷ 10 =

BIT

_____________

________________

Strokes per Step

Initial Circulation Pressure

-

________________ Final Circulation Pressure

÷ 10 = ____________ PSI per Step

FCP

SURFACE

______________ Strokes Bit to Surface

÷

10 = ____________ Strokes per Step

DISCLAIMER: This Well Control Worksheet is intended solely for the use of the IADC and IADC accredited schools and organizations engaging in the teaching of the IADC WellCAP Well Control classes. The IADC, its employees or others acting on its behalf, makes no warranties or guarantees expressed, implied or statutory, as to any matter whatsoever, with respect to the use of this Well Control Worksheet.

Field Units (psi, ft, ppg)

Rev 12/12/05 Page 2

GRAPHIC ANALYSIS FINAL CIRCULATION PRESSURE (psi)

INITIAL CIRCULATION PRESSURE (psi)

3000

2000

1000

0 Stroke Pressure Time

FORMULAS 1. Pressure Gradient (psi/ft) = Mud Weight (ppg) x 0.052 2. Hydrostatic Pressure (psi) = Mud Weight (ppg) x 0.052 x Depth (ft, TVD) 3. Capacity (bbls/ft) = Inside Diameter2 (in.) ÷ 1029.4 4. Annular Capacity(bbls/ft) = (Inside Diameter of Casing2 (in.) or Hole Diameter2 (in.) - Outside Diameter of Pipe2 (in.)) ÷ 1029.4 5. Pipe Displacement (bbls/ft) = (Outside Diameter of pipe2 (in.) - Inside Diameter of pipe2 (in.)) ÷ 1029.4 6. Maximum Allowable Mud Density (ppg) =

Surface LOT Pressure (psi) Shoe Depth (ft, TVD) x 0.052

+ LOT Mud Density (ppg)

7. MAASP (psi) = [Maximum Allowable Mud Density (ppg) - Present Mud Density (ppg)] x 0.052 x Shoe TVD (ft) 8. Pressure Drop per Foot Tripping Dry Pipe (psi/ft) =

Drilling Mud Density (ppg) x 0.052 x Metal Displacement (bbl/ft) Casing Capacity (bbl/ft) - Metal Displacement (bbl/ft)

9. Pressure Drop per Foot Tripping Wet Pipe (psi/ft) =

Drilling Mud Density (ppg) x 0.052 x Closed End Displacement (bbl/ft) Casing Capacity (bbl/ft) - Closed End Displacement (bbl/ft)

10. Formation Pressure (psi) = Hydrostatic Pressure Mud in Hole (psi) + SIDPP (psi) 11. EMW (ppg) @ Shoe = (SICP (psi) ÷ 0.052 ÷ Shoe Depth (ft, TVD) ) + Present Mud Weight (ppg) 12. Sacks (100 lb) of Barite Needed to Weight-Up Mud =

Bbls of Mud in System x 14.9 x (KMW - OMW) (35.4 - KMW)

NOTE: This formula assumes that the average density of Barite is 35.4 ppg and the average number of sacks (100lb) per barrel is 14.9.

13. Volume Increase from Adding Barite (bbls) = Number of Sacks (100 lb) added ÷ 14.9 15. Equivalent Fluid Density (ppg) @ __________ depth (ft) =

Pressure (psi) Depth (ft, TVD) x 0.052

16. Estimated New Pump Pressure at New Pump Rate (psi) = Old Pump Pressure (psi) x

[

17. Estimated New Pump Pressure with New Mud Density (psi) = Old Pump Pressure (psi) x

New Pump Rate (SPM) Old Pump Rate (SPM)

2

]

New Mud Density (ppg) Old Mud Density (ppg)

DISCLAIMER: This Well Control Worksheet is intended solely for the use of the IADC and IADC accredited schools and organizations engaging in the teaching of the IADC WellCAP Well Control classes. The IADC, its employees or others acting on its behalf, makes no warranties or guarantees expressed, implied or statutory, as to any matter whatsoever, with respect to the use of this Well Control Worksheet.

Field Units (psi, ft, ppg)

Rev 12/12/05 Page 3