String Size Weight Grade Thread Top Bottom Bit Size Sacks TOCSurface9 5/8'' 36 J-55 STC 16.0' 1,901' 13 1/2'' 620 SurfaceInterm.7'' 32 P-110 BTC 16.0' 11,019' 8 3/4'' - 4,527'MD TVD10,241' 10,244'10,392' 10,411'10,729' 10,692'11,266' 10,832'20,324' 10,844'20,374' 10,843'TD20,374'TD:PBTD:ITEM2,454'2,470'90° :45° :KOP:4-1/2” Liner Top:1026029833-053-03014WAF.OND.009010260296102602979/2/2009Facilities Network:Spud Date:Original Elevation (GL):KB Elevation (KB):API Number:AFE Number:Drilling Network:Completion Network:19,923.2' Top19,926.3' Btm1.25'' Ball4-1/2" Shoe20,374.0' Top20,374.0' BtmSwell Packer19,433.8' Top19,450.2' BtmSliding Sleeve Sliding SleeveSwell Packer18,493.5' Top18,509.9' BtmSTAGE 2Sliding SleeveSTAGE 3 STAGE 1Swell Packer17,561.9' Top1.50'' Ball1.75'' BallSwell Packer12,877.7' Top12,894.1' BtmSwell Packer13,816.0' TopSwell Packer15,687.7' Top15,704.1' Btm 17,578.3' BtmSwell Packer14,752.8' Top14,769.2' BtmSliding Sleeve3.50'' BallSwell Packer16,625.5' Top16,641.9' Btm13,832.4' Btm2.75'' BallSliding Sleeve3.00'' BallSliding Sleeve3.25'' BallSliding SleeveSliding Sleeve2.00'' Ball2.25'' Ball2.50'' BallSTAGE 6 STAGE 5 STAGE 4Sliding SleeveSliding SleeveSTAGE 10 STAGE 9 STAGE 8 STAGE 77" Shoe11,018.6' Top11,018.6' BtmSwell Packer11,943.2' Top11,959.6' BtmLASSEN 41-26H18,988.2' Top18,991.3' Btm18,051.6' Top18,054.7' Btm17,119.4' Top17,122.5' Btm16,179.1' Top16,182.2' BtmMcKenzie, NDBakken HorizontalSeptember, 200914,312.0' Btm 15,245.9' Btm12,432.1' Top 13,369.7' Top 14,308.9' Top 15,242.8' Top11,503.4' Top11,506.5' Btm 12,435.2' Btm 13,372.8' Btm6" Hole4-1/2", 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 15.250Page 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 8.921Page 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 6.094Page 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 4.000Page 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 4.000Page 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 CementPage 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