Exxonmobil Upstream Research Company

Shangli Ou

Scott C Hornbostel

Method for inverting, in the frequency domain (), controlled source electromagnetic survey data () acquired using a time-division compound waveform made up of sub-sequences of different base waveforms, for example square waves of different frequencies. A windowed Fourier decomposition method is used, with the window size and shape designed in consideration of the sub-sequences. The window length may be twice the length of the compound waveform, or more. Alternatively the window length may be comparable to the sub-sequence length, or slightly less. Window shapes include cos, rectangular, and triangular. The method addresses the problem of unknown arrival times for each sub-sequence, and also transition transients that occur between sub-sequences.

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Sugar Land, TX, United States of America

Shangli Ou