Overview:
Survey Analysis – Application
- Data tables of MWD raw sensor data and calculated values
- Graphical Representation of QC Data
- Utilize “What if” Scenarios to determine potential biasing
- Allows recognition of
• Potential problems with MWD
• Potential assembly biasing
• Potential influence of biasing upon azimuth
Input Parameters
- Well details
- Geographical Location
- Geomagnetic Model Values
- Input data values – user defined option for local IFR data
Data Tables – Raw Data
- MWD tool values calculated from tool sensor values
• dB = Raw Bt - Be
• dDip = Raw Dip - Dipe
Chart of Inclination vs Measured Depth
- Gt, Bt and Dip should be constant through full range of inclination
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J Strugell and S Sargeant - Aligis Software Solutions Incorporated