PROCESS OF GEOELECTRIC PROSPECTING Russian patent published in 1997 - IPC

FIELD: deep probing in search for gas and oil fields. SUBSTANCE: parameters of inhomogeneity are brought out to light by results of advance studies. Area Q_in of this inhomogeneity is calculated with its projection on day surface. Area size on which observations are conducted is calculated by formula Q=Q_in+ h²/2,, where h is depth of bedding of inhomogeneity. Maximal and minimal distances between sources of field are calculated by equations ; , where α is measurement error. Geophones are arranged by system of profiles with spacing Dy between geophones. At least two sources of field are positioned in parallel to inhomogeneity on opposite sides of it. Electric current same in value and direction is passed. Derivative of vertical component of vector of magnetic induction and first horizontal components of electromagnetic field UIx

and UIy are registered in observation points. Electric components Ueaх and Ueay of anomalous field are extracted with allowance for parameters of holding medium. Then electric current same in value and with same direction on one side of inhomogeneity and with opposite direction on the other side is passed. Second horizontal components UIIx and UIIy of electromagnetic field are registered and magnetic components Umax and Umay of anomalous field are isolated. EFFECT: improved authenticity of process. 2 cl, 8 dwg