SDI Standard Survey Report

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1 BHP Billiton Petroleum Crockett County, Texas (NAD 83 TXC) OH - Job #32D : MWD 24 August, 2012

2 Local Co-ordinate Reference: Well MD Reference: Wellbore: OH - Job #32D Calculation Method: Minimum Curvature Project Crockett County, Texas (NAD 83 TXC) Map System: Geo Datum: Map Zone: US State Plane 1983 North American Datum 1983 Texas Central Zone System Datum: Mean Sea Level Site Site Position: From: Position Uncertainty: Map 0.00 usft Northing: 10,313, usft Easting: 1,976, usft Slot Radius: 13-3/16 " Latitude: Longitude: Convergence: 30 57' N ' W Well Well Position Position Uncertainty +N/-S +E/-W 0.00 usft 0.00 usft 0.00 usft Northing: Easting: Wellhead Elevation: 10,314, usft 1,977, usft usft Latitude: Longitude: Ground Level: 30 57' N ' W 2, usft Wellbore OH - Job #32D Magnetics Design Actual Model Name Sample Date Declination Dip Angle Field Strength (nt) IGRF /16/ ,969 Audit Notes: Version: 1.0 Phase: ACTUAL Tie On : 0.00 Vertical Section: From (TVD) +N/-S +E/-W Direction Program Date 08/20/12 From To (Wellbore) Tool Name Description Gyro (OH - Job #32D ) 1, , MWD (OH - Job #32D ) Keeper MWD Keeper Standard Rate Gyro MWD Measured 1, , , , , , , , , , , , , , , , , , , , , , /24/12 11:00:56PM Page 2

3 Local Co-ordinate Reference: Well MD Reference: Wellbore: OH - Job #32D Calculation Method: Minimum Curvature Measured 3, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , /24/12 11:00:56PM Page 3

4 Local Co-ordinate Reference: Well MD Reference: Wellbore: OH - Job #32D Calculation Method: Minimum Curvature Measured 6, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , /24/12 11:00:56PM Page 4

5 Local Co-ordinate Reference: Well MD Reference: Wellbore: OH - Job #32D Calculation Method: Minimum Curvature Measured 9, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , /24/12 11:00:56PM Page 5

6 Local Co-ordinate Reference: Well MD Reference: Wellbore: OH - Job #32D Calculation Method: Minimum Curvature Measured 13, , , , PBHL - Univ 46 13, , , , Last MWD 14, , , , Projection to Bit Annotations Measured Vertical +N/-S Local Coordinates +E/-W Comment 13, , , Last MWD 14, , , Projection to Bit Checked By: Approved By: Date: 08/24/12 11:00:56PM Page 6

7 G T M s to North True North: 0.53 Magnetic North: 6.84 To convert a Magnetic Direction to a Direction, Add 6.84 To convert a True Direction to a Direction, Add 0.52 Magnetic Field Strength: snT Dip Angle: Date: 07/16/2012 Model: IGRF Crockett County, Texas (NAD 83 TXC) Northing (Y) Easting (X) Plan #4 vs Actual - 8-3/4" Hole WELL DETAILS: Ground Level: N/-S +E/-W Northing Easting Latittude Longitude Slot ' N ' W SECTION DETAILS PROJECT DETAILS: Crockett County, Texas (NAD 83 TXC) Geodetic System: US State Plane 1983 Datum: North American Datum 1983 Ellipsoid: GRS 1980 Zone: Texas Central Zone System Datum: Mean Sea Level Projection to Bit Last MWD PBHL Sec MD Inc Azi TVD +N/-S +E/-W Dleg TFace VSect Target PBHL - Univ 46 SITE DETAILS: Site Centre Northing: Easting: Positional Uncertainity: 0.00 Convergence: Local North: DESIGN TARGET DETAILS 7200 GL Name TVD +N/-S +E/-W Northing Easting Latitude Longitude Shape PBHL - Univ ' N ' W Point - plan hits target center Map System: US State Plane 1983 Datum: North American Datum 1983 Ellipsoid: GRS 1980 Zone Name: Texas Central Zone Local Origin: Well, North Becky Wharton Scientific Drilling 2034 Trade Drive Midland, TX Latitude: 30 57' N Longitude: ' W East: North: Scale Factor: Geomagnetic Model: IGRF2010 Sample Date: 16-Jul-12 Magnetic Declination: CASING 6.32 DETAILS FORMATION TOP DETAILS Dip No Angle casing from data Horizontal: is available59.34 Magnetic Field Strength: TVDPath MDPath Formation DipAngle DipDir To convert a Magnetic Direction to a TL1Direction, 0.80 Add To convert a Magnetic Direction to a True Direction, Add 6.32 East To convert a True Direction to a Direction, Add (300 usft/in) (50 usft/in) TL1 Last MWD PBHL - Univ 46 Projection to Bit Vertical Section at 1.06 (50 usft/in) L E G E N D, OH - Job #32D , Actual V0 Plan #4-8-3/4" Hole South(-)/North(+) (300 usft/in) PBHL TL Last MWD Projection to Bit Vertical Section at 1.06 (300 usft/in) West(-)/East(+) (300 usft/in)

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SDI Standard Survey Report

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