Oil well production profile logging tool using microwave resonance method

The utility model provides a cross-section logging instrument for producing oil well production liquid with microwave resonance method, which makes use of the variation of electro-magnetism resonant condition to obtain the output voltage follows the variation of moisture content to change, and then measures the moisture content of the crude oil. The cross-section logging instrument is composed of a collecting pipe, a flow meter, a moisture content sensor and a data processing circuit. The cross-section logging instrument is characterized in that the moisture content sensor consists of a probe and a sensing circuit assembly, and the probe is an elongated internal conductor which is wrapped an insulating sleeve outside; the probe and an external conductor comprise the resonance circuit of the moisture content sensor, and the resonance frequency of the resonance circuit depends on the oil-water ratio of the inner annular space. The probe is connected with a connecting sleeve tube and is sealed by an O-shaped ring, and the root of the probe is equipped with an electromagnetic screen cover. The sensing circuit assembly is composed of an oscillating circuit and a detecting circuit, and the probe is connected with the sensing circuit assembly by a thrusting needle. The sensor with high accurate moisture content developed by the utility model better solves the effect of the mineral content of water to measurement result, and is applied to the crude oil with water-in-oil type and oil-in-water type.