DD2 Presentation:

Well: Tupilco 75 DLocation: MCA-MXS (Villahermosa, TAB)Client: GSM Date: December 9th, 2010

Eloy Giles.

Outline• Well Location• Well Challenges

– Anti-Collition (Spider Plot + TC Plot)– Geological Faults

• Well Objectives– Well Plan– Well Plots

• BHA Designs• Hydraulics• Torque & Drag• Results

– Plan VS Real

2

Well Location

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Surface Coordinates:

N 18° 21’ 13.91100”

W 93° 20’ 48.2266”

NAD27 UTM Zone 15N

RKB Elev: 13.43 mts

Ground Level Elev: 7.33 mts

Referenced to True North

Mag. Declination: 2.957°

Challenges

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• Anti-Collition– Tupilco 85 ct-to-ct distance of 11.31 mts @ surface and up to 180 mts MD– Field with many BLIND vertical wells and with OSF less than 1

Challenges

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• Geological Faults– Primary Objective (A18-

A10) delimited by geological faults. @ 2372 TVD.

– Needed to drill minimizing Ct-to-Ct separation from Plan

– Holding a Max angle of 51 deg, Inclination. (Hole Cleaning!)

L.TUP-75D

T-84D

T-2001

F

L.TUP-75D

T-84D

T-2001

F

Well Objectives

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• Type “J” Well, drilled in 2 stages, 12 ¼” and 8 ½”– Last Well drilled with this particular client, they were introducing their own DD

Services. Important to demonstrate Schlumberger’s superior performance.

• 12 ¼” Section (150 mts – 1050 mts MD):– Vertical from 150 mts MD to 180 mts MD and then nudge (4° Inc, 272.7° Az, 1°

DLS) to reduce AC Risks with nearby BLIND wells.– After nudge (@300 mts MD), drop inclination to 0 deg, and drill vertical again up to

1050 mts MD for Casing Depth

• 8 1/2” Section (1050 mts – 1050 mts MD):– Drill vertical from 1050 mts MD up to 1630 mts MD.– KOP @ 1630 mts building a max. Inclination of 50.04°, 272.78° AZ, 1.9° DLS. – From 2420 mts MD hold tangent section to TD, VS Reached: 1132 mts

Well Plan

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Well Plots

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BHA Designs: 12 ¼” Stage

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Hydraulics: 12 ¼” Stage

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Nozzle DetailsBit

Type: MilledToothHole Size: in 12.250

TFA: in2 1.114Nozzles: 1/32 in 3 x 22

BHA Designs: 8 ½” Stage

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Hydraulics: 8 ½” Stage

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Torque & Drag

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• Approach

– Reamed each Joint 2 times @ 40 srpm, continuously monitoring S&V.

– Every 6 joints pumped a “Dispersing Pill””to create turbulence, followed by a “Viscous Pill” to carry cuttings to surface.

– Short Trip from Mid-Curve to Notch. Then a 2nd from TD to beginning of Curve. Then POOH.

Results:

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• Ended 2 Days ahead of Drill Plan• No SQ incidents related to Stuck Pipe• Delimited Objectives Not Compromised• Client recognized SLB’s Value & Expertise