Deep Electromagnetic Exploration

ISBN-13: 9783540635031 / Angielski / Miękka / 1999 / 652 str.

D. Virchow; K. K. Roy; Shivendra K. Verma

Opis

Electromagnetic waves and their role in probing the earth are important for the exploration of the earth's deep crust. This book is not only for scientists in geophysics a useful source of information, but also for professionals in oil and gas exploration, geophysicists and engineers alike.

Spis treści

Electromagnetic waves in geophysics: A personal perspective.- Role of electromagnetics in probing the earth.- Antennas in the geophysical environment.- Dilemmas of MT interpretation, EM field distortion or real indication of resistivity distribution.- The Fennoscandian Shield: A treasure box for deep electromagnetic studies.- Magnetotelluric technique.- Rotation invariant magnetotelluric tensors: A case study from West Singhbhum (Bihar, India).- Magnetotelluric model of Singhbhum granite batholith.- Telluric field observations during the earth tremor activity near Gandipet (Hyderabad, India).- Deep electrical conductivity investigations in some geothermal areas of India.- Frontier technologies for hydrocarbon exploration—electrical conductivity reference exploration (ECRE).- Technology and some results of deep electromagnetic soundings in the former USSR.- Direct current resistivity traversing across Singhbhum shear zone near Ghatshila-Mosabani (eastern India).- Oceanic mantle conductivity structure determined from magnetotelluric data: Hollister revisited.- Methods for the analysis and interpretation of the sea floor electromagnetic fields.- On the design of ocean bottom electrometer.- EM sounding of sea bottom around Indian peninsula.- Electromagnetic migration.- Numerical modelling in electromagnetic induction.- Thin-sheet modelling for deep electromagnetic studies in the Fennoscandian Shield.- The generation and thermal and electromagnetic effects of rising melt in a three-dimensional subducting lithospheric slab model.- Fast difference-differential modelling for geophysical electrodynamics.- The 2- and 3-D modelling of EM induction and current chanelling in the Saurashtra and adjoining regions.- Magnetotelluric response on a layered earth with non-monotonic resistivity distribution.- Application of robust estimation of transfer functions for a magnetovariational array in Eastern India.- Geophysical inversion.- Crustal resistivity inversion using global optimization techniques.- Backus-Gilbert magnetotelluric inversion.- Stochastic inversion of magnetotelluric data.- Computational efficiency of the matrix method in the inversion of resistivity sounding data.- Application of ground transient EM systems in geophysical exploration.- Diffusion of an electromagnetic pulse in a heterogeneous earth.- The theoretical study of a possible high resolution resistivity sounding technique for groundwater exploration in hard rocks.- Transient CFS response over a multilayer earth.- Frontier technologies for hydrocarbon exploration, deep transient electromagnetic sounding (DTEM).- Recent developments in quantitative interpretation of VLF-EM data.- A study on the possibility of assessing anisotropy due to 2-D structures from VLF-EM data.- Response resolution of shielded conductors through multifrequency measurements: A review.- Electromagnetic depth sounding on a transitional earth using large rectangular loop source.- Application of electromagnetic propagation logging in the interpretation of fresh water neogene sands of upper Assam tertiary basin (India).