Measurement method of high water content in oil-water two-phase flow with double parallel line microwave resonant cavity sensor

Abstract

The invention relates to a method for measuring the geometric shape of a two-phase flow layered interface. The method is used for measuring the morphology of a layered interface of a two-phase flow with the conductivity difference. An adopted parallel line array sensor comprises two sets of parallel line electrodes, the parallel line electrodes in one set are distributed on the cross section of the same upstream pipeline and all serve as exciting electrodes, and the parallel line electrodes in the other set are distributed on the cross section of the same downstream pipeline and all serve as receiving electrodes. Each exciting electrode and the receiving electrode which are opposite in position form a pair of line electrodes. All the electrodes are fixed to a fixing piece and penetrate through a horizontal measuring pipeline. The measuring method comprises the steps that under the premise that the morphology of the oil-water layered interface is not destroyed by the parallel line array sensor, the geometric dimension of the parallel line array sensor is determined; the line electrode pairs are measured successively, and a frame of measuring data can be collected; and the measuring response of the parallel line array sensor is calibrated through two-phase distribution of layered gas and water which stand in the horizontal measuring pipeline.

Description

technical field [0001] The invention relates to a production logging technology of an oil-water two-phase flow production profile of an oil well with medium and low flow and high water cut in the field of oil field dynamic monitoring. Background technique [0002] Due to the long-term use of water flooding in my country's onshore low-porosity and low-permeability oilfields, oil wells are mostly in the production state of low flow rate and high water cut oil-water two-phase flow. High-resolution measurement of water cut in oil-water two-phase flow in oil wells with low flow rate and high water cut is of great value for enhancing oil recovery and optimizing reservoir production characteristics. [0003] At present, the conventional oil well fluid production profile testing technology mostly uses the conductivity method and the capacitance method to measure the water cut. The frequency of the excitation signal of the conductivity method and the capacitance method is generally b...

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Problems solved by technology

[0003] At present, the conventional oil well fluid production profile testing technology mostly uses the conductivity method and the capacitance method to measure the water cut. The frequency of the excitation signal of the conductivity method and the capacitance method is generally below 100MHz. 90%), the water cut measurement resolution of oil-water two-phase flow is low, which poses a challenge to correctly guide the adjustment of the development plan of high water-cut oilfields

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