Active Geophysical Monitoring

CHAPTER 18

3D ELECTROMAGNETIC HOLOGRAPHIC IMAGING IN ACTIVE MONITORING OF SEA-BOTTOM GEOELECTRICAL STRUCTURES

Michael S. Zhdanov^a, Martin Cuma^b, and Takumi Ueda^c

Contents

1. Introduction

2. Marine Controlled-Source Electromagnetic (MCSEM) Method

3. Frequency Domain Electromagnetic (FDEM) Migration of MCSEM Data

4. Electromagnetic Imaging Using Joint Migration of Electric and Magnetic Fields

5. Regularized Iterative Migration

6. Migration of Synthetic MCSEM Data

6.1. Model 1

6.2. Model 2

7. Inversion of Troll Gas Province MCSEM Data

8. Conclusion

Acknowledgments

References

1. INTRODUCTION

During the last few years marine controlled-source electromagnetic (MCSEM) surveys have become widely used for offshore petroleum exploration. The main target ...