Reflex EZ-TRAC - 1 INTRODUCTION; 1.1 Contact REFLEX; 1.2 Manual conventions; 2 GENERAL

MANUAL – REFLEX EZ-TRAC™ | 3
Table of contents
1 INTRODUCTION ............................................................................................................................ 7
1.1 Contact REFLEX™............................................................................................................ 7
1.2 Manual conventions........................................................................................................... 7
2 GENERAL ...................................................................................................................................... 8
2.1 REFLEX EZ-TRAC
TM
at a glance ...................................................................................... 8
2.1.1 Survey types ...................................................................................................................... 8
2.1.2 Magnetic and gravimetric................................................................................................... 8
2.1.3 Survey accuracy ................................................................................................................ 8
2.1.4 Equipment.......................................................................................................................... 9
2.1.5 Post processing of data ..................................................................................................... 9
2.2 Warranty ............................................................................................................................ 9
2.2.1 Shipping instructions for instrument return........................................................................ 9
3 ABOUT SURVEYING................................................................................................................... 10
3.1 All boreholes deviate ....................................................................................................... 10
3.1.1 Calculation of underground positions .............................................................................. 10
3.2 Direction of downhole object............................................................................................ 11
3.2.1 Measurement of direction ................................................................................................ 11
3.3 Single shot survey ........................................................................................................... 11
3.4 Multi shot survey.............................................................................................................. 11
3.5 Orientation survey............................................................................................................ 11
4 WORKING PRINCIPLES ............................................................................................................. 12
4.1 Introduction ...................................................................................................................... 12
4.2 Magnetism .......................................................................................................................12
4.2.1 Magnetometers................................................................................................................ 12
4.3 Gravity.............................................................................................................................. 13
4.3.1 Accelerometers................................................................................................................ 13
4.4 Temperature .................................................................................................................... 13
5 ABOUT SURVEY ACCURACY.................................................................................................... 14
5.1 Introduction ...................................................................................................................... 14
5.2 Magnetic interference ...................................................................................................... 14
5.2.1 Man-made interference from within the hole ................................................................... 14
5.2.2 Man-made interference from outside the hole................................................................. 15
5.2.3 Natural magnetism........................................................................................................... 15
5.3 Identify interference ......................................................................................................... 15
5.3.1 Earth’s Magnetic Field ..................................................................................................... 16
5.3.1.1 Total intensity....................................................................................................................... 16
5.3.1.2 Inclination............................................................................................................................. 16
5.3.1.3 Annual rate of change.......................................................................................................... 17
5.3.2 Background magnetic field .............................................................................................. 17
5.3.3 Magnetic threshold .......................................................................................................... 18
5.3.4 Quality control.................................................................................................................. 18
5.3.5 Filter out bad data............................................................................................................ 18
5.4 Survey station depth........................................................................................................ 19
5.5 Centralization................................................................................................................... 19
5.6 Temperature .................................................................................................................... 19
5.7 Comparisons and Averaging ........................................................................................... 19
6 ABOUT SURVEY DATA .............................................................................................................. 20
6.1 Introduction ...................................................................................................................... 20
6.2 Dip and azimuth............................................................................................................... 20
6.3 Magnetic components...................................................................................................... 20
6.3.1 Total magnetic field strength............................................................................................ 20
6.3.2 Magnetic dip..................................................................................................................... 20
6.3.3 Magnetic integrity............................................................................................................. 21
6.3.4 Magnetic declination........................................................................................................ 21
6.4 Rotation............................................................................................................................ 21
6.5 Temperature .................................................................................................................... 22