CROSS-WELL PULSED ELECTROMAGNETIC EXPLORATION OF THE BAZHENOV FORMATION FROM LOWER CRETACEOUS AND UPPER JURASSIC RESERVOIRS

Abstract

The article is devoted to the theoretical substantiation of new direction in geological exploration of the Bazhenov Formation – the technology of pulsed electromagnetic cross-well exploration, which is based on the idea of involving a system of vertical and horizontal wells drilled in target objects of Lower Cretaceous and Upper Jurassic deposits. The high potential and new capabilities of the proposed technology are demonstrated on realistic models of well sections of the East-Surgut field (Latitudinal Ob Region). Based on the results of numerical simulation, it was found that electromagnetic signals have a high level and sensitivity to the geoelectric parameters of the Bazhenov Formation, which ensures its cross-well exploration at a considerable distance between wells with sources and receivers. The performed research significantly expands opportunities of electromagnetic sounding by the method of transient processes as applied to the tasks of oilfield geophysics in new formulations.