The practical experience of experimental application in 2009 of untraditional geoelectric methods of forming shortpulsed electromagnetic field (FSPEF) and vertical electricresonance sounding (VERS) (FSPEF-VERS expresstechnology) on the local area of Novokonstsantinovskaya fracture zones within Ukrainian crystalline shield are given. The three anomalous geoelectric zones of 3.2 km2 area of gas (gas-condensate) type were revealed and mapped on investigation area by FSPEF method survey. The bedding depths of the anomalous polarized layers (APL) of gas and gas-condensate type were determined by VERS sounding. The anomalous zones were fixed along the general tectonic fractures. The revealed APL of gas and gas-condensate type in vertical cross-section are situated in parallel with tectonic fractures. The optimal places for the degassing borehole locations were delineated on measurements data by the FSPEF-VERS methods. The local anomalous zone of «uranium mineralization area» type was revealed and mapped by FSPEF method survey with the special antenna using. The experiment results testify of practical possibility of the FSPEF-VERS technology using for the hydrocarbon accumulations exploration and prospecting in tectonically fractured zones of crystalline basement, as well as they are one more weighty arguments to practicability of the more broad using of FSPEF-VERS methods in geological prospecting process for oil and gas.
The results of experimental geoelectric investigation within Novokonstantinovskaya fracture zone are considered in the report. The field measurements were carried out there at September 2009. The investigation area is situated at Kirovogradskiy ore region of Ukrainian crystalline shield (Bakarzhiev et al., 1995; Starostenko et al., 2007; Tarasov, 2004). The main purpose of studies was conducting of the field works by geoelectric methods the forming of short-pulsed electromagnetic field (FSPEF) and vertical electricresonance sounding (VERS) (Levashov et al., 2005a, 2005b, 2006, 2008) for mapping the possible gas and gascondensate accumulations within separate areas of the fracture zone. The general tasks were following: a) the "deposit" type anomalous zones (DTA) detection within the fractured zone by the FSPEF survey; b) determination of the bedding depths and thicknesses of anomalous polarized layer (APL) of "gas" and "gas-condensate" type by VERS sounding within the mapped DTA; c) estimation of possibility of the FSPEF and VERS methods using for the uranium mineralization zones mapping, as well as for determination of bedding depths and thicknesses of ore bodies; d) estimation of prospects of the FSPEF and VERS methods application for the oil and gas accumulations prospecting in crystalline massifs and in fractured zones of crystalline basement.
1. The following facts are given in one of the production reports: a) "Experience of the exploration and exploitation of uranium deposits in Kirovogradskiy ore region (KOR) shows that all known deposits (Bakarzhiev et al., 1995; Tarasov, 2004) are found in similar condition on fracturing, watering, composition of ore and the bedding form of ore bodies. The deep tectonic fractures’ studying has shown that these decompactional structures are not only the collector of fracture water on greater depth, but also of dissolved gas in water".
