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Basis of Design West Lebada LV04_v2

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LVO4 Jupiter

Drilling & Measurements OSC

Client : Well : Field : Rig :

BASIS OF DESIGN (ver 2) Petrom LVO4 Delta - Lebada West Jupiter

BASIS OF DESIGNClient: Petrom Field: Delta - Lebada West Rig: Jupiter Well: LVO4Hole Sections: Version Drill. Prog.: Version Plan: Date:

36'' 16'' 12.25" 8.5x9.125'' 6'' 2 3 20 Sep 08

Prepared for: Operations Support Center Eng. Firat Ustun

Schlumberger D&MWell Plan, BHA's, Anticollision BHA's, Anticollision BHA's Well Plan, BHA's, Anticollision Client MWD/LWD Manager Project Manager DD Manager OSC Manager

The above client's signature implies agreement of all data present in the whole document that follows this first page20

TABLE OF CONTENTS

- Well Data - Survey Program - Objectives and Recommendations - Plot, Plan and Plan Interpolated - Well Geometry - BHAs - Hydraulics - Magnetic Interference - Anticollision - Spider Plot

Drilling Program v1

WELL DATADrilling Program v1 Petrom Client Delta - Lebada West Field LVO4 Well LVO4 Borehole TARGETS Name TVD [m] Tinta 1872.80 1942.80 Talpa Rig Surface Coord. Lat/Long Surface Coord. N/E SSTVD [m] 1840.00 1910.00 Northing 4930630.00 4930240.00 Rotary Table 32.8 m relative to MSL -48.000 m relative to MSL GL / Water Depth N 44 31 57.159, E 29 28 4.328 N 4931161.800 m, E 457720.300 m Easting 458800.00 459100.00 Shape Circle Circle Radius [m] 50.00 50.00 Thickness [m]

12 1/4 8 1/2 x 9 1/8 36 16 6 SECTION [in] 150 501 1171 1171 m 0 150 501 2363 2947 2363 MD In / Out 1192 m 150 584 351 670 Interval 501 0 m 150 150 1852 1852 501 1100 1100 1910 TVD In / Out 5.5 5.5 44 44 deg 0 0 0 73.45 73.45 83.68 Inc In / Out 0 180 101.5 140.1 140.1 142.3 0 180 101.5 0 deg Az In / Out deg/30m 0.50 2.70 3.0 0.00 2.50 Max DLS 9 5/8 13 3/8 30 7 4 1/2" CASING PROFILE 7.0 30.0 13.375 9.625 4.5 in OD / ID 501.0 2362.0 1120.0 150.0 0 1171 0.0 0.0 2313 2947 m MD From / To 1242 634 150 501 1171 m Length P110 11.99 P110 9.19 P110 12.19 12.60 N80 mm Wall T./Grade 8 1/2 x 9 1/8 6 12 1/4 36 16 HYDRAULICS Bentonite UltraDril UltraDrill FloThru Mud Type 1.12 - 1.2 1.3-1.35 1.2 - 1.4 1.65-1.75 ppg MW 30-40 25-35 35-50 25-35 20-25 15-25 10-25 22-40 cP | lb/100ft2 PV / YP 3 x 20, 1 x 22 in/32 Nozzles Flow /max SPP lpm | bar DRILLING PARAMETERS klb Block weight klb | kftlb WOB / TOB m/h| ROP / RPM 6 16 12 1/4 36 8 1/2 x 9 1/8 BHA's Motor PowerDrive Rotary PowerDrive Bit type ReedHycalog ReedHycalog ReedHycalog ReedHyacolog Bit Manufacturer RSX616M RSX613M T11 T11 Bit Model N/A N/A PD675 PD475 Rotary Steerable A965 / 1.5 N/A N/A A825 / 1.5 Motor / Bent Housing N/A N/A N/A N/A Geosteering N/A N/A ImPulse ARCVision Res-Gamma Ray-ECD GyroMWD GyroMWD TeleScope ImPulse MWD N/A N/A N/A N/A Formation Press while drill N/A N/A N/A N/A Sonic N/A N/A N/A N/A Density-Porosity-Cal - PowerPulse: MWD tool for inclination / direction measurements, and real time transmission of surveys / LWD data to surface. - GVR: LWD tool for Resistivity at the Bit measurement - ARC: LWD tool for measurements of resistivity, gamma ray annular pressure while drilling APWD (for ECD calculation) - ISonic: LWD tool for sonic measurements - SADN: LWD tool for density, porosity and caliper measurement Version update: Drilling Plan Modifications applied: Program

Well Design / Well Geometry

Plan and WellBore Geometry

Drilling Program v1

PetromWELL FIELD STRUCTURE

LVO4Magnetic Parameters Model: BGGM 2008 Dip: Mag Dec: 62.027 +5.083 Date: FS: September 17, 2008 48407.1 nT Surface Location Lat: Lon:

Delta - Lebada WestUTM CM 30E - WGS84, Meters Northing: Easting: 4931161.80 m 457720.30 m Grid Conv: Scale F act: -0.37319667 0.9996219823 Miscellaneous Slot: Plan: N44 31 57.159 E29 28 4.328

PFS-6 - LebadaLVO4 LV04 Rev3.0 fu 17Sep08 TVD Ref: Srvy Date: RKB (32.80 m above MSL) September 17, 2008

>

-350

-175

0

175

350

525

700

875

1050

1225

1400

1575

Hold 490 MD 489 TVD 5.50 180.00az 13 3/8" Casing Point 501 MD 500 TVD Tie-In 0 MD 0 TVD 0.00 180.00az Mud Line 81 MD 81 TVD 0.00 180.00az

Build 0.5/30m 160 MD 160 TVD 0.00 180.00az

350

30" Casing Point 150 MD 150 TVD

Build and Turn 2.70/30m 1850 MD 1589 TVD 44.00 101.50az

175

-175

Build 1.50/30m 511 MD 510 TVD 5.50 180.00az Build 2.50/30m 600 MD 599 TVD 9.97 180.00az

0Hold 2336 MD 1845 TVD 73.45 140.10az

0

175

30" Casing Point 150 MD 150 TVD

Select and delete any previous pictures loaded Click on LC and select the .emf exported from PowerDrawHold 1120 MD 1064 TVD 44.00 101.50az 9 5/8" Casing Point 1171 MD 1100 TVD

-1757" Casing Point 2363 MD 1853 TVD

-350LVO4 Tinta

350

Build 0.5/30m 160 MD 160 TVD 0.00 180.00az

525

Hold 490 MD 489 TVD 5.50 180.00az 13 3/8" Casing Point 501 MD 500 TVD

Build and Turn 3.00/30m 2373 MD 1856 TVD 73.45 140.10az Hold 2442 MD 1871 TVD 80.14 141.82az

-525

-700

700

Build 1.50/30m 511 MD 510 TVD 5.50 180.00az Build 2.50/30m 600 MD 599 TVD 9.97 180.00az Hold 1120 MD 1064 TVD 44.00 101.50az

LVO4 Tinta 2450 MD 1873 TVD 80.14 141.82az LVO4 Talpa 2947 MD 1943 TVD 83.68 142.30az LV04 Rev3.0 fu 17Sep08 LVO4 Talpa

-875

875

-1050

1050

1225

9 5/8" Casing Point 1171 MD 1100 TVD

1400

True

Build and Turn 3.00/30m 2373 MD 1856 TVD 73.45 140.10az Build and Turn 2.70/30m 1850 MD 1589 TVD 44.00 101.50az 7" Casing Point 2363 MD 1853 TVD

Hold 2442 MD 1871 TVD 80.14 141.82az LVO4 Tinta 2450 MD 1873 TVD 80.14 141.82az LVO4 Talpa 2947 MD 1943 TVD 83.68 142.30az

Grid Mag

1575

1750

True North Tot Corr (M->T +5.0830) Mag Dec (+5.083)

Hold 2336 MD 1845 TVD 73.45 140.10az LVO4 Tinta LVO4 Talpa

1925

Grid Conv (-0.37319667)

2100 0 175 350 525 700 875 1050 1225 1400 1575 1750

LV04 Rev3.0 fu 17Sep08

1925Quality Control Date Drawn: Wed 06:55 PM September 17, 2008 Drawn by: F.Ustun Checked by: Client OK:

Vertical Secti on (m ) Azi m = 123.37, Scale = 1(cm ):175(m ) Ori gin = 0 N/-S, 0 E/-WTargetsName Latitude Longitude Northing Easting NS EW TVD SSTVD Shape Dimensions LVO4 Talpa N44 31 27.571 E29 29 7.102 4930240.00 459100.00 -913.14 1386.20 1942.80 1910.00 CIRCULAR Diameter: 100.00 LVO4 Tinta N44 31 40.149 E29 28 53.399 4930630.00 458800.00 -524.95 1083.55 1872.80 1840.00 CIRCULAR Diameter: 100.00

Critical PointsComments Tie-In Mud Line 30" Casing Point Build 0.5/30m Hold 13 3/8" Casing Point Build 1.50/30m Build 2.50/30m Hold 9 5/8" Casing Point Build and Turn 2.70/30m Hold .7" Casing Point Build and Turn 3.00/30m Hold LVO4 Tinta LVO4 Talpa Survey MD 0.00 80.80 150.00 160.00 490.00 500.56 510.60 600.00 1120.00 1170.60 1850.00 2335.65 2363.04 2373.04 2441.95 2450.21 2947.46 Inclination 0.00 0.00 0.00 0.00 5.50 5.50 5.50 9.97 44.00 44.00 44.00 73.45 73.45 73.45 80.14 80.14 83.68 Azimuth 180.00 180.00 180.00 180.00 180.00 180.00 180.00 180.00 101.50 101.50 101.50 140.10 140.10 140.10 141.82 141.82 142.30 TVD Sub-Sea TVD 0.00 -32.80 80.80 48.00 150.00 117.20 160.00 127.20 489.49 456.69 500.00 467.20 510.00 477.20 598.56 565.76 1063.60 1030.80 1100.00 1067.20 1588.72 1555.92 1845.00 1812.20 1852.80 1820.00 1855.65 1822.85 1871.39 1838.59 1872.80 1840.00 1942.80 1910.00 VS 0.00 0.00 0.00 0.00 8.71 9.26 9.79 16.41 218.31 250.92 688.91 1087.71 1112.85 1122.03 1185.94 1193.66 1659.93 NS 0.00 0.00 0.00 0.00 -15.83 -16.84 -17.80 -29.83 -114.86 -121.87 -215.96 -438.98 -459.12 -466.47 -518.56 -524.95 -913.14 EW 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 185.75 220.19 682.67 1013.31 1030.15 1036.30 1078.52 1083.55 1386.20 N N N N N N N N N N N N N N N N N Latitude 44 31 57.159 44 31 57.159 44 31 57.159 44 31 57.159 44 31 56.646 44 31 56.613 44 31 56.582 44 31 56.192 44 31 53.437 44 31 53.210 44 31 50.161 44 31 42.934 44 31 42.282 44 31 42.044 44 31 40.356 44 31 40.149 44 31 27.571 Longitude E 29 28 4.328 E 29 28 4.328 E 29 28 4.328 E 29 28 4.328 E 29 28 4.328 E 29 28 4.328 E 29 28 4.328 E 29 28 4.328 E 29 28 12.741 E 29 28 14.300 E 29 28 35.246 E 29 28 50.219 E 29 28 50.982 E 29 28 51.260 E 29 28 53.172 E 29 28 53.399 E 29 29 7.102 Easting 457720.30 457720.30 457720.30 457720.30 457720.20 457720.19 457720.18 457720.11 457905.23 457939.61 458401.29 458730.35 458747.05 458753.15 458795.02 458800.00 459100.00 Northing 4931161.80 4931161.80 4931161.80 4931161.80 4931145.98 4931144.97 4931144.01 4931131.98 4931045.77 4931038.54 4930941.48 4930716.39 4930696.16 4930688.76 4930636.42 4930630.00 4930240.00 DLS 0.00 0.00 0.00 0.00 0.50 0.00 0.00 1.50 2.48 0.00 0.00 2.69 0.00 0.00 3.00 0.00 0.22

LV04 Rev3.0 fu 17Sep08 ProposalReport Date: September 17, 2008 Client: Petrom Field: Delta - Lebada West Structure / Slot: Jupiter Well: LVO4 Borehole: UWI/API#: Survey Name / Date: Tort / AHD / DDI / ERD ratio: Grid Coordinate System: Location Lat/Long: Location Grid N/E Y/X: Grid Convergence Angle: Survey / DLS Computation Method: Minimum Curvature / Lubinski Vertical Section Azimuth: 123.370 Vertical Section Origin: N 0.000 m, E 0.000 m TVD Reference Datum: RKB TVD Reference Elevation: 32.8 m relative to MSL Sea Bed / Ground Level Elevation: Magnetic Declination: Total Field Strength: Magnetic Dip: Declination Date: Magnetic Declination Model: North Reference: Total Corr Mag North -> True North:

LVO4

LV04 Rev3.0 fu 17Sep08 / September 17, 2008 106.847 / 1758.76 m / 5.971 / 0.905 UTM CM 30E - WGS84, Meters N 44 31 57.159, E 29 28 4.328 N 4931161.800 m, E 457720.300 m -0.37319667 Grid Scale Factor: 0.99962198Measured Depth (m) Vertical Section (m)

-48.000 m relative to MSL 5.083 48407.077 nT 62.027 September 17, 2008 BGGM 2008 True North +5.

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