String Size Weight Grade Thre

Surface 9 5/8'' 36 J-55 STC 

Interm. 7'' 32 P-110 BTC 

MD TVD

10,241' 10,244'10,392' 10,411'10,729' 10,692'11,266' 10,832'20,324' 10,844'20,374' 10,843'

TD:

PBTD:

ITEM

2,454'2,470'

90° :45° :

KOP:

4-1/2” Liner Top:

10260298

33-053-03014

WAF.OND.0090

1026029610260297

9/2/2009

Facilities Network:

Spud Date:

Original Elevation (GL):

KB Elevation (KB):

API Number:

AFE Number:

Drilling Network:

Completion Network:

Sw

18

18

Sliding Sleev

STAGE 3 

Swell Packer

17,561.9' Top

1.75'' Ball 

Swell Packer

12,877.7' Top

12,894.1' Btm

Swell Packer

13,816.0' Top

Swell Packer

15,687.7' Top

15,704.1' Btm 17,578.3' Btm

Swell Packer

14,752.8' Top

14,769.2' Btm

Sliding Sleeve

3.50'' Ball

Swell Packer

16,625.5' Top

13,832.4' Btm 16,641.9' Btm

2.75'' Ball

Sliding Sleeve

3.00'' Ball

Sliding Sleeve

3.25'' Ball

Sliding Sleeve Sliding Sleeve

2.50'' Ball 2.25'' Ball 2.00'' Ball

STAGE 6 STAGE 5 STAGE 4

Sliding Sleeve Sliding Sleeve

STAGE 10 STAGE 9 STAGE 8 STAGE 7

7" Shoe

11,018.6' Top

11,018.6' Btm

Swell Packer

11,943.2' Top

11,959.6' Btm

LASSEN 41-26H

18,051.6' Top

18,054.7' Btm

17,119.4' Top

17,122.5' Btm

16,179.1' Top

16,182.2' Btm

McKenzie, ND

Bakken Horizontal

September, 2009

14,312.0' Btm 15,245.9' Btm

11,503.4' Top 12,432.1' Top 13,369.7' Top 14,308.9' Top 15,242.8' Top

11,506.5' Btm 12,435.2' Btm 13,372.8' Btm

4-1/2", 11.6#/ft, P-110 Liner w/4.0" ID

Lassen 41-26H 

API # 3305303014-14 

No analysis done. 
Date 9/8/2010

Field Keene

Cum prod wtaer @ sample, bbls 10,807

Well Name/ Sampling Point Lassen 41‐26H

Iron 353

Barium 0

Strontium N/A

Manganese N/A

Calcium 22600

Magnesium 1519

Copper N/A

Zinc N/A

Lead N/A

Aluminum N/A

Sodium* 98223

Bicarbonate Alkalinity 61

Sulfate 177

Chloride 195701

CO3 0

CO2 3540

H2S 0

Measured pH 5.70

Specific Gravity 1.202

Temperature 60

Pressure 28

Calcite Calculation Method Known PH

Calcite (Calcium Carbonate) ‐0.80

Calcite (Calcium Carbonate) N/A

Gypsum (Calcium Sulfate) ‐0.32

Gypsum (Calcium Sulfate) N/A

Hemihydrate (Calcium Sulfate) ‐0.31

Hemihydrate (Calcium Sulfate) N/A

Anhydrite (Calcium Sulfate) ‐0.08

Anhydrite (Calcium Sulfate) N/A

Barite (Barium Sulfate) N/A

Barite (Barium Sulfate) N/A

Celestite (Strontium Sulfate) N/A

Celestite (Strontium Sulfate) N/A

Lab # 10‐1076‐11
Lassen 41-26H

2935 BW flowback 

Flowback H20 was trucked off location and disposed of in approved SWD well. 
LASSEN 41-26H

3305303014

TOTAL Cum. Water (8/29/2011) 13702 bbls

Produced water is hauled to a permitted facility for disposal.

Page 1/1

LASSEN 41-26H

Report Printed: 9/1/2011

Casing

Conductor

Casing

Casing Description

Conductor

Set Depth (ftKB)

85.0

Run Date

8/28/2009

Set Tension (kips)

Centralizers Count Scratchers Count

Casing Components

Item Description

OD Nominal

(in) Wt (lbs/ft) Grade Top Thread Jts Section Length(ft) Top (ftKB) Btm (ftKB)

M-U Torque

Targ (ft-lbs) Class Max OD (in) Nominal ID(in)

Casing Joints 16 65.00 H-40 2 69.00 16.0 85.0 15.250
Page 1/1

LASSEN 41-26H

Report Printed: 9/1/2011

Casing

Surface

Casing

Casing Description

Surface

Set Depth (ftKB)

1,901.4

Run Date

9/3/2009

Set Tension (kips)

Centralizers Count Scratchers Count

Casing Components

Item Description

OD Nominal

(in) Wt (lbs/ft) Grade Top Thread Jts Section Length(ft) Top (ftKB) Btm (ftKB)

M-U Torque

Targ (ft-lbs) Class Max OD (in) Nominal ID(in)

Landing JT. 9 5/8 36.00 J-55 0 0.00 16.0 16.0 8.921

Casing Pup Joint 9 5/8 36.00 J-55 1 7.05 16.0 23.1 8.921

Casing Joints 9 5/8 36.00 J-55 43 1,832.99 23.1 1,856.1 8.921

Float Collar 9 5/8 36.00 J-55 1 1.50 1,856.1 1,857.6 8.921

Casing Joints 9 5/8 36.00 J-55 1 42.57 1,857.6 1,900.2 8.921

Guide Shoe 9 5/8 36.00 J-55 1 1.25 1,900.2 1,901.4 8.921
Page 1/1

LASSEN 41-26H

Report Printed: 9/1/2011

Casing

Intermediate1

Casing

Casing Description

Intermediate1

Set Depth (ftKB)

11,018.6

Run Date

9/15/2009

Set Tension (kips)

Centralizers Count Scratchers Count

Casing Components

Item Description

OD Nominal

(in) Wt (lbs/ft) Grade Top Thread Jts Section Length(ft) Top (ftKB) Btm (ftKB)

M-U Torque

Targ (ft-lbs) Class Max OD (in) Nominal ID(in)

LANDING JOINT 7 32.00 P-110 BTC 0 0.00 16.0 16.0 6.094

CASING HANGER 7 32.00 P-110 BTC 1 2.90 16.0 18.9 6.094

Casing Joints 7 32.00 P-110 BTC 236 10,949.96 18.9 10,968.9 6.094

FLOAT COLLAR 7 32.00 P-110 BTC 1 1.25 10,968.9 10,970.1 6.094

Casing Joints 7 32.00 P-110 BTC 1 47.02 10,970.1 11,017.2 6.094

FLOAT SHOE 7 32.00 P-110 BTC 1 1.45 11,017.2 11,018.6 6.094
Page 1/2

LASSEN 41-26H

Report Printed: 9/1/2011

Casing

Production1

Casing

Casing Description

Production1

Set Depth (ftKB)

20,374.0

Run Date

9/23/2009

Set Tension (kips)

Centralizers Count Scratchers Count

Casing Components

Item Description

OD Nominal

(in) Wt (lbs/ft) Grade Top Thread Jts Section Length(ft) Top (ftKB) Btm (ftKB)

M-U Torque

Targ (ft-lbs) Class Max OD (in) Nominal ID(in)

Polished Bore 

Receptacle

5.93 11.60 P110 BTC 1 14.94 10,241.2 10,256.2 5.250

Hanger/Packer 4 1/2 11.60 P110 BTC 1 3.57 10,256.2 10,259.7 4.000

Centralizer 4 1/2 11.60 P110 BTC 1 0.61 10,259.7 10,260.3 4.000

4 1/2" Buttress Liner 4 1/2 11.60 P110 BTC 28 1,242.94 10,260.3 11,503.3 4.000

Stim Sleeve 10 4 1/2 11.60 P110 BTC 1 2.29 11,503.3 11,505.6 4.000

4 1/2" Buttress Liner 4 1/2 11.60 P110 BTC 10 437.59 11,505.6 11,943.2 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 0 0.00 11,943.2 11,943.2 4.000

TAM Swelling 

Packer 9

4 1/2 11.60 P110 LTC 1 15.80 11,943.2 11,959.0 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 11 473.18 11,959.0 12,432.1 4.000

4 1/2" Casing Pup 4 1/2 11.60 P110 LTC 1 6.23 12,432.1 12,438.4 4.000

Stim Sleeve 9 4 1/2 11.60 P110 LTC 1 2.28 12,438.4 12,440.7 4.000

4 1/2" Casing Pup 4 1/2 11.60 P110 LTC 1 3.75 12,440.7 12,444.4 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 10 433.32 12,444.4 12,877.7 4.000

TAM Swelling 

Packer 8

4 1/2 11.60 P110 LTC 1 15.80 12,877.7 12,893.5 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 11 476.18 12,893.5 13,369.7 4.000

4 1/2" Casing Pup 4 1/2 11.60 P110 LTC 1 6.24 13,369.7 13,375.9 4.000

Stim Sleeve 8 4 1/2 11.60 P110 LTC 1 2.29 13,375.9 13,378.2 4.000

4 1/2" Casing Pup 4 1/2 11.60 P110 LTC 1 4.27 13,378.2 13,382.5 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 10 433.47 13,382.5 13,816.0 4.000

TAM Swelling 

Packer 7

4 1/2 11.60 P110 LTC 1 15.80 13,816.0 13,831.8 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 11 477.15 13,831.8 14,308.9 4.000

4 1/2" Casing Pup 4 1/2 11.60 P110 LTC 1 6.24 14,308.9 14,315.2 4.000

Stim Sleeve 7 4 1/2 11.60 P110 LTC 1 2.28 14,315.2 14,317.4 4.000

4 1/2" Casing Pup 4 1/2 11.60 P110 LTC 1 4.27 14,317.4 14,321.7 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 10 431.06 14,321.7 14,752.8 4.000

TAM Swelling 

Packer 6

4 1/2 11.60 P110 LTC 1 15.80 14,752.8 14,768.6 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 11 474.19 14,768.6 15,242.8 4.000

4 1/2" Casing Pup 4 1/2 11.60 P110 LTC 1 6.23 15,242.8 15,249.0 4.000

Stim Sleeve 6 4 1/2 11.60 P110 LTC 1 2.28 15,249.0 15,251.3 4.000

4 1/2" Casing Pup 4 1/2 11.60 P110 LTC 1 4.27 15,251.3 15,255.5 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 10 432.17 15,255.5 15,687.7 4.000

TAM Swelling 

Packer 5

4 1/2 11.60 P110 LTC 1 15.80 15,687.7 15,703.5 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 11 475.61 15,703.5 16,179.1 4.000

4 1/2" Casing Pup 4 1/2 11.60 P110 LTC 1 6.22 16,179.1 16,185.3 4.000

Stim Sleeve 5 4 1/2 11.60 P110 LTC 1 2.28 16,185.3 16,187.6 4.000

4 1/2" Casing Pup 4 1/2 11.60 P110 LTC 1 3.76 16,187.6 16,191.4 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 10 434.08 16,191.4 16,625.5 4.000

TAM Swelling 

Packer 4

4 1/2 11.60 P110 LTC 1 15.80 16,625.5 16,641.3 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 11 478.14 16,641.3 17,119.4 4.000

4 1/2" Casing Pup 4 1/2 11.60 P110 LTC 1 6.24 17,119.4 17,125.6 4.000

Stim Sleeve 4 4 1/2 11.60 P110 LTC 1 2.28 17,125.6 17,127.9 4.000

4 1/2" Casing Pup 4 1/2 11.60 P110 LTC 1 3.76 17,127.9 17,131.7 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 10 430.25 17,131.7 17,561.9 4.000

TAM Swelling 

Packer 3

4 1/2 11.60 P110 LTC 1 15.80 17,561.9 17,577.7 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 11 473.85 17,577.7 18,051.6 4.000

4 1/2" Casing Pup 4 1/2 11.60 P110 LTC 1 6.22 18,051.6 18,057.8 4.000

Stim Sleeve 3 4 1/2 11.60 P110 LTC 1 2.27 18,057.8 18,060.1 4.000

4 1/2" Casing Pup 4 1/2 11.60 P110 LTC 1 4.28 18,060.1 18,064.4 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 10 429.10 18,064.4 18,493.5 4.000
Page 2/2

LASSEN 41-26H

Report Printed: 9/1/2011

Casing

Production1

Casing Components

Item Description

OD Nominal

(in) Wt (lbs/ft) Grade Top Thread Jts Section Length(ft) Top (ftKB) Btm (ftKB)

M-U Torque

Targ (ft-lbs) Class Max OD (in) Nominal ID(in)

TAM Swelling 

Packer 2

4 1/2 11.60 P110 LTC 1 15.80 18,493.5 18,509.3 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 11 478.95 18,509.3 18,988.2 4.000

4 1/2" Casing Pup 4 1/2 11.60 P110 LTC 1 6.25 18,988.2 18,994.5 4.000

Stim Sleeve 2 4 1/2 11.60 P110 LTC 1 2.28 18,994.5 18,996.7 4.000

4 1/2" Casing Pup 4 1/2 11.60 P110 LTC 1 4.22 18,996.7 19,001.0 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 10 432.89 19,001.0 19,433.8 4.000

TAM Swelling 

Packer 1

4 1/2 11.60 P110 LTC 1 15.80 19,433.8 19,449.6 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 11 473.60 19,449.6 19,923.2 4.000

4 1/2" Casing Pup 4 1/2 11.60 P110 LTC 1 6.25 19,923.2 19,929.5 4.000

Stim Sleeve 1 4 1/2 11.60 P110 LTC 1 2.29 19,929.5 19,931.8 4.000

4 1/2" Casing Pup 4 1/2 11.60 P110 LTC 1 3.76 19,931.8 19,935.5 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 9 388.52 19,935.5 20,324.1 4.000

Float Collar 4 1/2 11.60 P110 LTC 1 1.35 20,324.1 20,325.4 4.000

4 1/2" LTC Liner 4 1/2 11.60 P110 LTC 1 43.68 20,325.4 20,369.1 4.000

Float Collar 4 1/2 11.60 P110 LTC 1 1.35 20,369.1 20,370.4 4.000

Guide Shoe w/ Side 

Ports

4 1/2 11.60 P110 LTC 1 3.56 20,370.4 20,374.0 4.000
Page 1/1

LASSEN 41-26H

Report Printed: 9/1/2011

Cement

Cement Details

Description

Surface Casing Cement

Cementing Start Date

9/3/2009 05:45

Cementing End Date

9/3/2009 07:30

Wellbore Name

Original Hole

Comment

Cement Stages

Stage # 1

Description

Surface Casing Cement

Objective Top (ftKB)

16.0

Bottom (ftKB)

1,901.0

Full Return?

Yes

Cmnt Rtrn ...

70.0

Top Plug?

Yes

Btm Plug?

No

Q (start) (bbl/min)

2

Q (end) (bbl/min)

2

Q (avg) (bbl/min)

5

P (final) (psi)

480.0

P (bump) (psi)

1,149.0

Recip?

No

Stroke (ft) Rotated?

No

Pipe RPM (rpm)

Depth tagged (ftKB) Tag Method Depth Plug Drilled Out To (ftKB) Drill Out Diameter (in)

Comment

Cement Fluids & Additives

Fluid

Fluid Type

Lead Cement

Fluid Description Estimated Top (ftKB)

16.0

Est Btm (ftKB)

1,370.0

Amount (sacks)

360

Class

C

Volume Pumped (bbl)

212.0

Yield (ft3/sack)

3.20

Mix H20 Ratio (gal/sa...

19.90

Free Water (%) Density (lb/gal)

11.20

Plastic Viscosity (cp) Thickening Time (hrs)

3.50

CmprStr 1 (psi)

288.0

Additives

Additive

S001

Type

CALCIUM CHLORIDE

Concentration

3.0

Conc Unit label

%BWOC

Additive

D079

Type

CHEMICAL EXTENDER

Concentration

4.0

Conc Unit label

%BWOC

Additive

D903

Type

CLASS C CMT

Concentration

94.0

Conc Unit label

LB/SK

Additive

D053

Type

GYPSUM

Concentration

2.0

Conc Unit label

%BWOC

Additive

D130

Type

POLYESTER FLAKE

Concentration

0.125

Conc Unit label

LB/SK

Fluid

Fluid Type

Tail Cement

Fluid Description Estimated Top (ftKB)

1,370.0

Est Btm (ftKB)

1,370.0

Amount (sacks)

260

Class

G

Volume Pumped (bbl)

54.0

Yield (ft3/sack)

1.17

Mix H20 Ratio (gal/sa...

5.10

Free Water (%) Density (lb/gal)

15.80

Plastic Viscosity (cp) Thickening Time (hrs)

2.00

CmprStr 1 (psi)

2,231.0

Additives

Additive

S001

Type

CALCIUM CHLORIDE

Concentration

2.0

Conc Unit label

%BWOC

Additive

D907

Type

CLASS G CMT

Concentration

94.0

Conc Unit label

LB/SK

Additive

D130

Type

POLYESTER FLAKE

Concentration

0.125

Conc Unit label

LB/SK

Surface Casing Cement
Page 1/1

LASSEN 41-26H

Report Printed: 9/1/2011

Cement

Cement Details

Description

Intermediate Casing Cement

Cementing Start Date

9/15/2009 07:00

Cementing End Date

9/15/2009 10:00

Wellbore Name

Original Hole

Comment

Cement Stages

Stage # 1

Description

Intermediate Casing 

Cement

Objective

CEMENT 

INTERMEDIATE 

CASING

Top (ftKB)

4,527.0

Bottom (ftKB)

11,020.0

Full Return?

No

Cmnt Rtrn ... Top Plug?

No

Btm Plug?

Yes

Q (start) (bbl/min)

6

Q (end) (bbl/min)

2

Q (avg) (bbl/min)

5

P (final) (psi)

2,000.0

P (bump) (psi)

2,700.0

Recip?

No

Stroke (ft) Rotated?

No

Pipe RPM (rpm)

Depth tagged (ftKB) Tag Method Depth Plug Drilled Out To (ftKB) Drill Out Diameter (in)

Comment

Cement Fluids & Additives

Fluid

Fluid Type

Lead Cement

Fluid Description Estimated Top (ftKB)

4,527.0

Est Btm (ftKB)

8,066.0

Amount (sacks)

399

Class

G

Volume Pumped (bbl)

143.0

Yield (ft3/sack)

1.90

Mix H20 Ratio (gal/sa...

10.95

Free Water (%) Density (lb/gal)

12.70

Plastic Viscosity (cp) Thickening Time (hrs) CmprStr 1 (psi)

Additives

Additive

EXTENDER

Type

D020

Concentration

6.0

Conc Unit label

%BWOB

Additive

ANTIFOAM

Type

D046

Concentration

0.2

Conc Unit label

%BWOB

Additive

DISPERSANT

Type

D065

Concentration

0.3

Conc Unit label

%BWOB

Additive

FLUID LOSS

Type

D112

Concentration

0.4

Conc Unit label

%BWOB

Additive

LCM

Type

D140

Concentration

0.125

Conc Unit label

LBS/SX

Additive

RETARDER

Type

D800

Concentration

0.6

Conc Unit label

%BWOB

Additive

SALT

Type

DO44

Concentration

10.0

Conc Unit label

%BWOW

Fluid

Fluid Type

Tail Cement

Fluid Description Estimated Top (ftKB)

8,066.0

Est Btm (ftKB)

11,020.0

Amount (sacks)

425

Class

G

Volume Pumped (bbl)

125.0

Yield (ft3/sack)

1.65

Mix H20 Ratio (gal/sa...

7.13

Free Water (%) Density (lb/gal)

15.60

Plastic Viscosity (cp) Thickening Time (hrs) CmprStr 1 (psi)

Additives

Additive

DISPERSANT

Type

D065

Concentration

0.75

Conc Unit label

%BWOC

Additive

SILICA

Type

D066

Concentration

35.0

Conc Unit label

%BWOC

Additive

LCM

Type

D140

Concentration

0.125

Conc Unit label

LBS/SX

Additive

FLUID LOSS

Type

D167

Concentration

0.2

Conc Unit label

%BWOC

Additive

RETARDER

Type

D800

Concentration

0.9

Conc Unit label

%BWOC

Additive

SALT

Type

DO44

Concentration

10.0

Conc Unit label

%BWOW

Intermediate Casing Cement