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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0115472 (1980-01-25) |
발명자 / 주소 |
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출원인 / 주소 |
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인용정보 | 피인용 횟수 : 283 인용 특허 : 6 |
An apparatus is disclosed for borehole measurements of the induced polarization of earth formations. The apparatus consists of an induced polarization logger capable of measuring both in-phase and quadrature conductivities in the frequency domain. A method is described which uses these measurements
An apparatus is disclosed for borehole measurements of the induced polarization of earth formations. The apparatus consists of an induced polarization logger capable of measuring both in-phase and quadrature conductivities in the frequency domain. A method is described which uses these measurements to determine cation exchange capacity per unit pore volume, Qv, brine conductivity, Cw, and oil and water saturations, So and Sw, in shaly sands.
An apparatus for induced polarization logging comprising: a sonde, said sonde having a housing formed of a non-metallic material and adapted for lowering in a borehole on a logging cable; at least a pair of current electrodes and a pair of non-polarizing voltage electrodes mounted on said sonde at v
An apparatus for induced polarization logging comprising: a sonde, said sonde having a housing formed of a non-metallic material and adapted for lowering in a borehole on a logging cable; at least a pair of current electrodes and a pair of non-polarizing voltage electrodes mounted on said sonde at various spaced longitudinal positions; a source of alternating current being located at the surface, said source being coupled to the pair of current electrodes and supplying alternating current to said electrodes at various discrete frequencies between 0.1 and 100 Hz; a reference resistor coupled in series with said alternating current source, and located in the sonde; a differential amplifier means with high input impedance, said amplifier being located in the sonde, said high input impedance differential amplifier being coupled to the pair of voltage electrodes; a phase detector, both said series resistor and said amplifier being coupled to said phase detector, said phase detector comparing the voltage across said series resistor and said amplifier signal, said phase detector being located in the sonde and supplying a voltage signal proportional to the phase shift induced by the earth formation for transmission to the surface; a jumper cable having both a stress member and a plurality of conductors, one end of the stress member of said jumper cable being secured to said sonde and the other end of the stress member being secured to a well logging cable coupling head, the output of said amplifier being coupled to at least some of the conductors in said cable and the outer surface of said jumper cable being electrically insulated; a logging cable, said logging cable being coupled to said coupling head; and, a recording means, said recording means being located at the surface and coupled to said logging cable.
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