Multi-phase compensating drilling electric resistivity well measuring apparatus

The utility model relates to a novel multi-phase compensating drilling electric resistivity well measuring instrument in the field of oil equipment. The technical proposal is as follows: the novel multi-phase compensating drilling electric resistivity well measuring instrument consists of a transmitting and receiving coil system, an electronic circuit and a device coil system, as well as a non-magnetic drill collar of the electronic circuit, wherein the coil system part comprises a plurality of groups symmetrically distributed transmitting coils with different source distances and two receiving coils arranged at the middle part of the coil system; the group number of the symmetrical transmitting coils can be chosen among 2-5 groups. The novel multi-phase compensating drilling electric resistivity well measuring instrument adopts a high-frequency electromagnetic wave measuring principle and simultaneously obtains a plurality of stratum electric resistivity well measuring curves with different probing depths by