Methods of transient em data compression

A transient electromagnetic signal is recorded in an earth formation while drilling at multiple times. Data for subsequent interpretation transmitted via a hydrochannel with narrow bandwidth, that reason the amount of information limited. Therefore, data compression indispensable element processing. It important to determine what parameters and how many them are necessary describe measured EMF curve. The idea transfer surface only significant allowing restore curve given accuracy. paper proposes simple fast methods based on spline approximation signal. Also, orthogonal basis measurement space used each by linear combination vectors from this basis. We analyze curves consider various magnetic field components. Numerical experiments show required reconstruct deep-reading tool.