GEOELECTRIC SURVEY METHOD AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2015 - IPC G01V3/08 

FIELD: instrumentation.

SUBSTANCE: above the trajectory of horizontal wells for the period of development of high-viscosity oils and bitumens the generating contour (GC) is arranged permanently and inside it the smaller system of measuring contours (MC) is provisioned. The system of GC and MC is arranged on, above or under earth surface. Each MC through the switchboard is connected to the registrar fitted with the device of delay time adjustment. During registration of the electromotive force (EMF) in MC temporary delays are determined on which against the background of signals registered simultaneously by all MCs the contrast growth of induced EMF is observed which corresponds to the signal from metal casing string. EMF is attributed on the selected delays to the passing trajectory. On the basis of plotted relation of longitudinal conductivity (S) with the depth (h) the relations of S with h on other MCs are estimated. Using them the thickness and the depth of productive layer are determined. Using the measured EMFs for the studied layer the seeming specific electric resistance (ρ_k) is determined and the coefficient of seeming bitumen saturation (S_B) for each cycle of measurements is calculated.

EFFECT: decrease of labour costs for execution measurements and increase of informational content of measurements at express monitoring of dynamics of extraction of high-viscosity oil and bitumen along the profile of horizontal wells in real time, control of the mode of injection of heat carrier, and also the selection mode.

8 cl, 3 dwg