Probe detection microstructure unit, sensor, device and method for measuring water content

Abstract

The invention provides a probe detection microstructure unit, a sensor, an apparatus for measuring water content and a method thereof. The probe detection microstructure unit comprises an insulating shell; and a probe used for measuring resistivity positioned in the insulating shell. The insulating shell comprises two opposite openings, liquid or gas flows into the insulating shell through one of the openings and the probe, and flows out of the insulating shell through the other opening. The sensor comprises several probe detection microstructure units; and the apparatus comprises the sensor, several resistivity detection circuits and control equipment. The sensor is easy for easy flowing, and does not change natural distribution state of oil, gas and water in an oil well. The probe detection microstructure unit, the sensor and the apparatus accord with oil-water random distribution characteristics of the producing layers under high water-containing state, the water content of the producing layers can be rapidly and timely detected, and the water content of the producing layers can be accurately determined.

Description

technical field [0001] The invention relates to the field of downhole monitoring in oil fields, in particular to a probe detecting microstructure unit, a water cut sensor, a water cut measuring device and a measuring method for measuring water cut, especially water cut in a state of non-uniform mixing of oil and water. Background technique [0002] In the process of oilfield exploitation, with the extension of development time, the output of crude oil will continue to decline. Since most oil wells are exploited by water injection or polymer injection, the water content of the oil well production fluid is very high. After long-term mining, the liquid produced in the formation is no longer a liquid with a uniform mixture of oil and water, but a mixed liquid of oil and water in the form of bubbles or slugs, and the crude oil has no continuous phase to speak of. [0003] No matter in the condition of two-phase flow or three-phase flow, the water cut parameters obtained by conve...

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Problems solved by technology

[0003] No matter in the condition of two-phase flow or three-phase flow, the water cut parameters obtained by conventional water cut measurement methods (such as capacitance method, impedance water content measurement method or high frequency electromagnetic wave measurement method) based on uniform mixing model Neither can reflect the real results, resulting in too large errors in the measurement of water content, resulting in misjudgments, resulting in insignificant water blocking effects or even failures

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