well control wb.xls

7/27/2019 Well Control WB.xls

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APPROXIMATION OF GAS TO SURFACE PRESSURESOURCE: BRITISH PETROLEUM WELL CONTROL MANUAL 4/6/1998Software in development - Free, No claims of accuracy.

DATA INPUT:

TD (ft) 18200 TD (M)= 5547.36 C= 0.12632176

KICK VOLUME (bbls) 160 Z @ TD= 1.97017032

OMW (ppg) 17.7 OMW (SG)= 2.125 FORM. P 16751.28KWM(ppg) 17.7 KWM (SG)= 2.125 K = 809259

HOLE SIZE (in) 7.714 H1= 2240

PIPE SIZE (in) 4.462

BHT (deg F) 320

SURF T (deg F) 120 NOTE: Z FACTOR

DRILLSTRING VOL (bbls) = 283 CONDITIO

INFLUX HYDROSTATIC (psi) 457 BY ALGOR

CHOKELINE LENGTH (ft) 20 CKLINE L (M) = 6 AR2.

CHOKELINE ID (in) 2.5 CKLINE VOL (bbls) = 0.12 Z FACTOR

IS SET TO

WAIT & WEIGHT METHOD (SURFACE BOP STACK):

PSURF (PSI) = 4176 S= 455.4835

DRILLER'S METHOD (SURFACE BOP STACK)

PSURF (PSI) = 4176 S= 455.4835

WAIT & WEIGHT METHOD (SUBSEA BOP STACK)

PSURF (PSI) = 4184 S= 439 9825


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C AVF surf bpm

WAIT WEIGHT SURFACE BOP

S P P

P

P P

P

AVF bpm

TD MW H MW MW

S K MW

C

S

DRILLERS METHOD SURFACE BOP

S TD MW

S K MW

C

S

gashyd f

gts

gashyd f

gts

=

=

= + -

= -

-

= -

- -

+

LNM

OQP

FHG

IKJ

= +

+

LNM

OQP

FHG

IK

1

1

25

25

2 1 421 1 421 2 1

4

2 1421

2

1 1421

4

1 1421

2

@ ( )

& , :

( )

. .

.

, :

.

.

.

.

b gb gb gb g b gbg b g

b gb gb gbg b g J

+

LNM

OQP FHGIKJ

+

LNM

OQP

FHG

IKJ

= + - - + + -

= -

= - + + -

= -

WAIT WEIGHT METHOD SUBSEA BOP

S H MW TD H D V C MW P P

P

DRILLERS METHOD SUBSEA BOP

S TD D V C MW P P

P

WHEREPRESSURES psi

TEMPERATURES R

DEPTHS M

WHD CL gas hyd f

gts

WHD CL gas hyd f

gts

S K MW

C

S

S K MW

C

S

& , :

( )( . )( ) ( ( / ))( )( . )

, :

( ( / ))( )( . )

:( )

(deg )

( )

.

.

.

.

1 1

25

25

1 421 1 2 1 421

1 1421

4

2 1421

2

4

1 1421

2

bg b g

bg b g

ANNULARVOLUME FACTORS bpm

MUDWEIGHTS SG

( )

( )


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DRILLSTRING VOLUME CALCULATION: WEIGHTED AVERAGE SIZE AND LENGTH CAL

LENGTH ID VOLUME SEC. NUMBER OD ID

SEC.1 8800 3.5 105 SEC.1 4 3.5

SEC.2 9400 4.276 167 SEC. 2 4 3.5

SEC.3 4.276 0 SEC. 3 4 3.5SEC.4 5.045 0 SEC. 4 5 4.276

TOTAL VOLUME= 272 SEC. 5

AVERAGE OD = 4.462

AVERAGE ID = 3.858

AT BOTTOM HOLE AVERAGE HOLE DIAM.= 7.714

NS IS CALCULATED

ITHM LOCATED AT

AT SURFACE CONDITIONS

.9


4/44


5/44

ULATOR FOR ANNULAR CALCULATIONS

LENGTH HOLE DIAM. HOLE LENGTH

3300 7.5 3300

5500 6.5 5500

1000 8.5 10008400 8.5 8400


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11/44

Gas Compressibility Factor Determination:

TEMP(deg F) = 320 INPUT ONLY

Press. (psig) = 16751.28

Gas Sp. Gravity = 0.75

Z Factor = 1.97017


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1= 25.18405

2= 1.924738

3= 0.596867

4= 0.054536

5= 0.191059

6= 0.015782

7= 4.59E-09

8= 3.53E-069= 14.86776


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P.T.C. Degasser Rating

& Safe Kill Rate ProgramSoftware in development, Free - No claims of accuracy Charlie Prentice 4/94

INPUT DATA ONLY IN SHADED AREAS

HEIGHT OF MUD SEAL IN DEGASSER (FEET) = 8

DENSITY OF FLUID IN DEGASSER (ppg),(CONDENSATE = 5.7ppg)= 5.7DIAMETER OF VENT LINE (INCHES) 8

LENGTH OF VENT LINE (FEET) 20

SAFETY FACTOR (1.1 to 3.5 RECOMMENDED) 1

DEGASSER RATING (SCFD) = 28189121

ORIGINAL MUD WEIGHT (PPG) 18

KILL WEIGHT MUD (PPG) 19TRUE VERTICAL DEPTH OF KICK (FEET) 32000

HOLE SIZE (INCHES) 8.5

DRILL COLLAR LENGTH (FEET) 200

DRILL COLLAR ID (INCHES) 2.8125

DRILL COLLAR SIZE (OD= INCHES) 6.5

DRILLPIPE LENGTH (FEET) 31800

DRILLPIPE ID (INCHES) 3.75

DRILLPIPE SIZE (OD= INCHES) 5.5

GAIN SIZE (BBLS) 50CASING ID AT SURFACE 11.75

DRILLSTRING CAPACITY (BBLS) = 436.3764

CASING PRESS. AT GTS - WAIT & WEIGHT METHOD (PSI) = 1997.42

CASING PRESSURE AT GTS - DRILLERS METHOD (PSI) = 2648.224


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P.T.C. KILL SHEET

Software under development, Free - No claim to accuracy. C.M. Prentice 4/98

INSTRUCTIONS: There can be as many as 10 hole sections. A hole section is defined when either a drillstring component

or when a directional section changes. Examples: A section can be when 5 1/2" drill pipe changes to 3 1/

Or a section is where a vertical section changes to a build section, or where a tangent section changes to

NOTE: The values for ID and Length for sections NOT being used MUST BE ENTERED AS ZEROS.

KICK INFORMATION:

SICP = 2636

SIDPP = 1664 KILL WEIGHT MUD = 19.0

OMW = 18 INITIAL CIRCULATING STANDPIPE PRESSURE = 2864

GAIN = 50 FINAL CIRCULATING STANDPIPE PRESSURE = 1267

SCR = 25 TOTAL CHANGE IN FRICTION = 67

SPP = 1200 FRICTION FACTOR, K = 4.779191613PUMP OUT = 0.138

TVD = 32000

DRILLSTRING AND HOLE SECTIONS INFORMATION AND CALCULATIONS:

SECTION NO. ID LENGTH TVD @ CAP. CAP. SUM SUM FRICTION

BOTTOM BBLS. STROKES BBLS. STROKES

0 0

1 5.051 25500 25500 632.6 4584 632.6 4584 37.1

2 4.276 5300 30800 94.2 683 726.8 5267 17.7

3 3.75 1000 31800 13.7 99 740.5 5366 6.4

4 2 8125 200 32000 1 5 11 742 0 5377 5 4


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1200

1300

1400

1500

1600

1700

1800

1900

2000

2100

2200

2300

2400

2500

0 500 1000 1500 2000 2500 3000 35

CIRC

ULATINGP

RES

SUR

PUMP STROKES


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changes

" drill pipe.

drop section.

INPUT

OUTPUT

SUM HYD. SUM HYD. STAND PIPE

FRICTION CHANGE CHANGE PRESSURE

2864

37.1 1326 1326 1575

54.8 276 1602 1317

61.2 52 1654 1272

66 7 10 1664 1267


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1575

131712721267

00 4000 4500 5000 5500


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dummy

5.051

4.276

3.75

2 8125


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PTC FRACTURE GRADIENT

PROGRAM Charlie Prentice 5/94

Software under development, Free - No claim to accuracy

INPUT

WATER DEPTH (FT) = 250

WATER DENSITY (PPG) = 8.6

AIR GAP (FT) = 70

DEPTH BELOW SEAFLOOR OR GROUND LEVEL (FT.) = 28000

FORMATION PRESSURE (PPG) = 18AGE CORRECTION ( 0 -4 ) = 3

AREA CORRECTION = 1.53

OSG FOR EQUIVALENT DEPTH CALCULATION = 1.0367511

EQUIVALENT DEPTH (FT) = 107.83688

v = 0.3573074

OSG= 1.0369838

EQUIVALENT STRENGTH AT IMAGINARY DEPTH = 19.947288

ACTUAL TENSILE STRENGTH (PSI)= 29155.106

FRACTURE GRADIENT (PPG) = 19.80


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UNDERGROUND BLOWOUT

FLOW CALCULATIONS CHARLES M. PRENTICE 8/05INFLUX GRADIENT = 0.12 INFLUX:

KILL WEIGHT(ppg)= 14.5 Grad = 0.754 GAS 1

TEMPGRAD (DEG F/FT)= 0.016 SALT WATER 2

GAS INFLUXEMW DEPTH TEMP F TEMP R PRESS Z Vol SCFD GPM

0 60 520 15 1 200000000 1040278Prop. P = 13.1 3000 108 568 2044 0.77332 1230981 6403

Form. P = 12.3 12000 252 712 7675 1.22505 654355 3404

REQUIRED KILL RATE = 1019 GPM = 24.3

DEPTH Vol BPD GPM

12000 80000 2333

PV = 40

YP= 18 Q =

SECTION LENGTH EQID FRIC LOSS

1 11000 4.28 3954

2 800 3.5 758

3 200 3 399

4 0

5 0

BIT TFA = 0.34975 11336

STANDPIPE PRESSURE = 15290

CIRCULATING PRESSURE TOO HIGH!!


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DRILL

CODE = 1 SIZE

2 3/8

TFA CALCULATOR

MV INFLX Q KILL AREA 2 7/8

(GPM) N0Z 1= 7 0.03758768 1019 NOZ 2= 7 0.03758

408 542 NOZ 3= 7 0.03758 3 1/2

BPM= NOZ 4= 7 0.03758NOZ 5= 7 0.03758

MV INFLX Q KILL NOZ 6= 7 0.03758

280 371 NOZ 7 = 9 0.06213 4

NOZ 8 = 9 0.06213NOZ 9 = 0.00000

1019 TFA = 0.34975

4 1/2

DRILPIPE CALCULATOR:

OD 5 T= 0.362

ID 4.276 AREA= 4.153816

MYS 105000

CLASS(N,P,2) P

STRENGTH = 12163 5

80% STR. = 9731

5 1/2


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PIPE DATA

WT/FT ID

4.85 1.995

6.65 1.815

6.85 2.441

10.4 2.151

9.5 2.992

13.3 2.764

15.5 2.602

11.85 3.476

14 3.34

14.69 3.24

13.75 3.958

16.6 3.826

20 3.64

22.82 3.5

24.66 3.4

16.25 4.408

19.5 4.276

25.6 4

19.2 4.892

21 9 4 778


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Z FACTOR ALGORITHM

t= 108 252

p= 2044 7675

g= 0.7 0.7

pr= 3.081275258 11.51055

tr= 1.456783791 1.826109

a 0.391550187 0.562421

b 0.073988174 0.057349c 0.295880431 0.213152

d 0.04757952 0.020324

e 4.27355E-05 3.15E-08

f 0.000699304 1.08E-05

aa 1.375290983 5.15269

Z= 0.773315847 1.225047


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Gas Compressibility Factor

Software under development, Free - No claim to accuracy. C.PRENTICE 4/7/98

TEMP(deg F) = 172 INPUT ONLY

Press. (psig) = 3591

Gas Sp. Gravity = 0.75

Z Factor = 0.856

NOTE: Z FACTOR IN THIS ALGORITHM, IS SOLVED IN 10 SEQUENTIAL CALCULATIONS.

THESE CALCULATIONS ARE LABELED 1 THRU 9 BELOW. THE TENTH CALCULATION IS MADE IN CELL B

1= 5.4164476

2= 1.5595312

3= 0.44746914= 0.0680022

5= 0.272865

6= 0.0376989

7= 5.745E-06

8= 0.000219

9= 2.6107495


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.


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36/44

MSP(MAXIMUM SURFACE PRESSURE)

CHARLIE PRENTICE 6/03

DEPTH OF PRESSURE SOURCE (TVD FT.) =

PRESSURE OF PRESSURE SOURCE (PPG) =

CRITICAL DEPTH (TVD FT.) =

GRADIENT OF RESERVOIR FLUID (PSI/FT) =

MUD WEIGHT (PPG) =

SAFETY FACTOR (PPG) =FRACTURE GRADIENT AT CRITICAL DEPTH (PPG) =

MSP- CONVENTIONAL WELL CONTROL


37/44

SURFACE PRESSURE FOR CASING

AND SURFACE EQUIPMENT DESIGN

16700 PERCENT OF HOLE MASP

17 EVACUATED TO GAS

14900 0 -608

0.18 10 629

17.7 20 1865

0 30 310218.5 33.3 3510

40 4338

50 5574

60 6811

66.6 7627

70 8047

620 80 928490 10520

100 11757


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SURFACE PRESSURE FOR LIMITED KICK LOAD CASE

FOR CASING DESIGN FOR BURST

LIMITED KICK VOLUME (BBL S) = 160

(SHOW SECTIONS FROM BOTTOM UP)

Section 1 Hole Diam. (in.) = 7.5

Section 1 Tubular od (in) = 4

Sectiol 1 Length (ft.) = 3200

Section 1 Volume (bbls) = 125.24Sum Volumes (bbls) = 125.24

Section 2 Hole Diam. (in) = 6.5

Section 2 Tubular OD (in) = 4

Section 2 Length (ft) = 4400

Section 2 Volume (bbls) = 112.31

Sum Volumes (bbls) = 237.55

Section 3 Hole Diam. (in.) = 8.5

Section 3 Tubular od (in) = 4

Sectiol 3 Length (ft.) = 1000

Section 3 Volume (bbls) = 54.70

Sum Volumes (bbls) = 292.25

Section 4 Hole Diam. (in) = 8.5

Section 4 Tubular OD (in) = 5

Section 4 Length (ft) = 8400


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MAX P AT CRIT POINT 14334

MW HYD AT POINT 13713.96


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DISCHARGE VELOCITY CALCULATIONS

WORK IN PROGRESS CMP 4/27/05

FP DEPTH = 32000

18.0

18.5

19.0

Z Factor = 2.927

DISCHARGE LINE ID. (inches) = 2 3

Formation Fluid SpG 0.75

BHT DegF 475

BHP psia 31631

Reservoir Conditions Z = 2.927Vol in csg @ Gas to Surf (bbls) = 132.16

Kick volume (bbls.) 50

Casing Pressure At GTS 2060

1= 47.53435974 3.11678558 Temperature of Gas @ GTS 140

2= 2.307217767 1.480567551 Gas to Surface (Still in Casing) Z = 0.785

3= 0.702366162 0.405233244 Gas Vol @ Atm. Conditions (bbls) = 20035 Vol Factor = 401

4= 0.046796248 0.072470829 1 bbl @ GTS equivalent at Atmos. Cond.(bbls) 152

5= 0.10538322 0.290552869 1 bbl @ GTS equivalent at Atmos. Cond. (cuft) 850

6= 0.003375665 0.045066779 Flow Area of discharge lines (sq. ft.) = 0.02181667 0.0490875

7= 2.61549E-12 2.68571E-05 Qkill (bpm) Time to discharge 1 bbl. (seconds) 2 Inch 3 Inch

8= 4.68932E-08 0.000534497 1 60 V (ft/sec)= 649.6 288.79= 12.63732633 1.351284944 2 30 V (ft/sec)= 1299.2 577.4

3 20 V (ft/sec)= 1948.8 866.1

4 15 V (ft/sec)= 2598.4 1154.9

5 12 V (ft/sec)= 3248.1 1443.6

6 10 V (ft/sec)= 3897.7 1732.3
mailto:Vol@Surf=mailto:Vol@Surf=


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0.0

500.0

1000.0

1500.0

2000.0

2500.0

3000.0

1 2 3 4

Kill Rate (bpm)

Discharge Velocities (fps)


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Kick Size Gain GTS Press

Reserv. P. psia 0 50 1798

29952 29967 0.5 20 1303

30784 30799 1 20 2185 DM

31616 31631 1 20 1496 W&W

1 50 2700 DM

1 50 2060 W&W

4 5 6

ANNULAR VOLUME = 3590

DRILLSTRING VOLUME = 741

TOTAL SYSTEM VOLUME = 4331

0.087266667 0.1363542 0.19635 Circulation Time4 Inch 5 Inch 6 Inch Sonic Vel.

162.4 103.9 72.2 1080 72.183 Hours

324.8 207.9 144.4 1080 36.092 Hours

487.2 311.8 216.5 1080 24.061 Hours

649.6 415.8 288.7 1080 18.046 Hours

812.0 519.7 360.9 1080 14.437 Hours

974.4 623.6 433.1 1080


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5 6

2 Inch

3 Inch

4 Inch

5 Inch

6 Inch

Sonic Vel.

well control wb.xls

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