METHOD AND DEVICE FOR LOCATING AN INTERFACE WITH RESPECT TO A FOREWORD

摘要

The invention concerns a method for determining the position, in a formation ( 1 ) containing at least one electrolytic liquid, of an interface ( 6 ) in relation to a bore hole ( 2 ). One stimulates at a first instant the interface ( 6 ) with an excitation signal, one detects at a second instant (t 2 ) a response signal converted by electro-osmosis or electrokinetic coupling effect and, if appropriate, the exication signal after reflection at a third instant (t 3 ). With the three instants and the propagation velocity of the signals, one calculates the distance between the interface ( 6 ) and the bore hole ( 2 ).