New EM technology uses vertical rather than horizontal electrical lines ///

The last 20 years have seen rapid development of electromagnetic techniques for hydrocarbon exploration, largely based on horizontal source and receiver technology. Recently, however, a vertical alternative has been explored that is based on transient rather than oscillatory signals, with vertical sources and receivers. In many circumstances of practical importance, this vertical approach may provide better resolution of hydrocarbon reservoirs. Field experience to date is encouraging.

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