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

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 Axis Semi Minor Axis Semi Major Axis 2 White Group 8/7/2009

Errors � Random Errors � Systematic Errors: Schlumberger Private – Relative depth error – References error – Drillstring magnetization interference – True inclination error – Survey tool misalignment – Sensor specific error 3 White Group 8/7/2009

Uncertainty Model � Simple Cone – Function of depth Schlumberger Private � Shell – Includes Inc – No minor axis or depth � Wolff and Wardt – Depth & Tool (Good & Bad) � SLB ISCWSA 4 White Group 8/7/2009

Schlumberger Private Azimuth Uncertainty White Group 8/7/2009 5

Schlumberger Private Tools Uncertainty White Group 8/7/2009 6

Schlumberger Private Targeting � Geological Target client/geologist – Planned area – Defined by White Group 8/7/2009 7

Schlumberger Private Geological Target White Group 8/7/2009 8

Schlumberger Private DrillerTarge Geological Target t White Group 8/7/2009 9

Targeting � Drillers Target – Area where drilled well Schlumberger Private needs to be located to comply with design criteria – Function of EOU and geological target 10 White Group 8/7/2009

Schlumberger Private DO Example (Geological Target) 11 White Group 8/7/2009

EOU Computed at Target Measured Vertical Semi-Axis Semi-Axis EOU Unc Major Axis Comments Inclination Azimuth TVD NS EW DLS Depth Section Major NEV Minor NEV Vertical Azimuth NEV Schlumberger Private ( 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 12 White Group 8/7/2009

Schlumberger Private Driller Target 13 White Group 8/7/2009

-2000 -1900 -1800 -1700 -1600 -1500 -1400 -1300 -1200 MWD Std Surveys -600 -600 -700 -700 Drillers Target R=240 Ft 9-MLL-9D-RJ Target Sizing Schlumberger Private 8 8 4 4 0 0 0 0 -800 T T -800 V V D D 8 8 5 5 0 0 0 0 T T V V D D 8 8 6 6 -900 EOU R=60 Ft 0 0 -900 0 0 T T V V D D 8 8 7 7 0 0 0 0 T T V V D D 8 -1000 8 -1000 0 0 8 8 T 0 V 0 D T V D 8 9 0 0 T V D -1100 -1100 9 9 0 0 0 0 0 0 T T V V D D 9 9 1 1 0 0 0 0 T T V V D D Geological Target R=300 -1200 -1200 9 9 2 2 0 0 0 0 T T V V D D Ft Target Sizing 9-MLL-9D-RJS V4.0 -2000 -1900 -1800 -1700 -1600 -1500 -1400 -1300 -1200 <<< W Scale = 1:100(ft) E >>> 14 White Group 8/7/2009

References � Power Plan Manual; Chapter 4 “Trajectory Design”; August 2002 Schlumberger Private � 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 15 White Group 8/7/2009