EOU & Taget Sizing White Group: - Eduardo Apestegui - Robert - - PowerPoint PPT Presentation

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May 01, 2023 451 likes •626 views

EOU & Taget Sizing White Group: - Eduardo Apestegui - Robert Kennedy - Salah Al Zubi - Yus Wilian Where are we? Survey: Depth Schlumberger Private Inclination Azimuth Errors are introduced in measurements Along hole

SLIDE 1

EOU & Taget Sizing

White Group:

Eduardo Apestegui
Robert Kennedy
Salah Al Zubi
Yus Wilian

SLIDE 2

Schlumberger Private 2 White Group 8/7/2009

Where are we?

Survey:

– Depth – Inclination – Azimuth

Errors are

introduced in measurements

Semi Major Axis Semi Minor Axis Along hole Axis

SLIDE 3

Schlumberger Private 3 White Group 8/7/2009

Errors

Random Errors Systematic Errors:

– Relative depth error – References error – Drillstring magnetization interference – True inclination error – Survey tool misalignment – Sensor specific error

SLIDE 4

Schlumberger Private 4 White Group 8/7/2009

Uncertainty Model

Simple Cone

– Function of depth

Shell

– Includes Inc – No minor axis or depth

Wolff and Wardt

– Depth & Tool (Good & Bad)

SLB ISCWSA

SLIDE 5

Schlumberger Private 5 White Group 8/7/2009

Azimuth Uncertainty

SLIDE 6

Schlumberger Private 6 White Group 8/7/2009

Tools Uncertainty

SLIDE 7

Schlumberger Private 7 White Group 8/7/2009

Targeting

Geological Target

– Planned area – Defined by client/geologist

SLIDE 8

Schlumberger Private 8 White Group 8/7/2009

Geological Target

SLIDE 9

Schlumberger Private 9 White Group 8/7/2009

Geological Target DrillerTarge t

SLIDE 10

Schlumberger Private 10 White Group 8/7/2009

Targeting

Drillers Target

– Area where drilled well needs to be located to comply with design criteria – Function of EOU and geological target

SLIDE 11

Schlumberger Private 11 White Group 8/7/2009

DO Example (Geological Target)

SLIDE 12

Schlumberger Private 12 White Group 8/7/2009

EOU Computed at Target

Comments Measured Depth Inclination Azimuth TVD Vertical Section NS EW DLS Semi-Axis Major NEV Semi-Axis Minor NEV EOU Unc Vertical Major Axis Azimuth NEV ( ft ) ( deg ) ( deg ) ( ft ) ( ft ) ( ft ) ( ft ) ( deg/100 ft ) ( ft ) ( ft ) ( ft ) ( deg )

9375.00 45.00 238.29 8706.07 1782.33

936.81
1516.27

0.00 60.22 23.08 15.16 148.97 9400.00 45.00 238.29 8723.75 1800.01

946.10
1531.31

0.00 60.77 23.17 15.29 148.96

MRL20 9423.21 45.00 238.29 8740.16 1816.42 -954.72

1545.28

0.00 61.28 23.24 15.40 148.96

9425.00 45.00 238.29 8741.42 1817.68

955.39
1546.35

0.00 61.32 23.25 15.41 148.96 9450.00 45.00 238.29 8759.10 1835.36

964.68
1561.39

0.00 61.86 23.34 15.54 148.96

SLIDE 13

Schlumberger Private 13 White Group 8/7/2009

Driller Target

SLIDE 14

Schlumberger Private 14 White Group 8/7/2009

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<<< W Scale = 1:100(ft) E >>>

8 7 T V D 8 6 T V D 8 8 T V D 8 4 T V D 8 5 T V D 8 6 T V D 8 7 T V D 8 8 T V D 8 9 T V D 8 5 T V D 9 T V D 9 1 T V D 9 2 T V D 9 1 T V D 9 T V D 9 2 T V D

Target Sizing 9-MLL-9D-RJ Target Sizing

8 4 T V D

9-MLL-9D-RJS V4.0

Geological Target R=300 Ft Drillers Target R=240 Ft EOU R=60 Ft

MWD Std Surveys

SLIDE 15

Schlumberger Private 15 White Group 8/7/2009

References

Power Plan Manual; Chapter 4 “Trajectory

Design”; August 2002

Survey Uncertainties, Survey Accuracy and

Target Sizing; Intouch ticket ID#3017487

KPI’s – DD Services

http://www.hub.slb.com/Docs/DandM/MEA_DEC/KPIs_- _DD_Services_English2.xls http://www.hub.slb.com/Docs/DandM/MEA_DEC/KPIs_- _DD_Services_Metric2.xls