Introduction to Controlled-Source Electromagnetic Methods
Detecting Subsurface Fluids

An introduction to the theory and practical application of CSEM methods to explore whether subsurface structures contain hydrocarbons.

Anton Ziolkowski (Author), Evert Slob (Author)

9781107058620, Cambridge University Press

Hardback, published 7 March 2019

332 pages, 175 b/w illus.
25.3 x 17.8 x 1.9 cm, 0.83 kg

This volume describes how controlled-source electromagnetic (CSEM) methods are used to determine the electrical conductivity and hydrocarbon content of the upper few kilometres of the Earth, on land and at sea. The authors show how the signal-to-noise ratio of the measured data may be maximised via suitable choice of acquisition and processing parameters and selection of subsequent data analysis procedures. Complete impulse responses for every electric and magnetic source and receiver configuration are derived, providing a guide to the expected response for real data. 1-D, 2-D and 3-D modelling and inversion procedures for recovery of Earth conductivity are presented, emphasising the importance of updating model parameters using complementary geophysical data and rock physics relations. Requiring no specialist prior knowledge of electromagnetic theory, and providing a step-by-step guide through the necessary mathematics, this book provides an accessible introduction for advanced students, researchers and industry practitioners in exploration geoscience and petroleum engineering.

Preface
Notation and conventions
1. Introduction
2. Sources, receivers, acquisition configurations and source time functions
3. Fourier analysis and linear filters
4. Electromagnetic fields in a horizontally layered VTI medium
5. Numerical examples
6. Source control
7. Deep-water CSEM
8. Land CSEM with a transient source signal
9. Shallow-water CSEM with a transient source signal
10. Forward and inverse modelling of CSEM data
11. Recovery of resistivities from CSEM data
12. Efficient CSEM
Appendix A. The electric field in a VTI whole space
Appendix B. The electromagnetic field in a VTI layered medium
Appendix C. Green's functions and their derivatives
Appendix D. The final value theorem
References
Index.

Subject Areas: Mining technology & engineering [TTU], Petroleum technology [THFP], Earth sciences [RB], Geophysics [PHVG], Petroleum & oil industries [KNBP], Mining industry [KNAT]