Two-group excitation coil multi-electrode electromagnetic correlation flow meter sensor

Abstract

The invention provides a two-set excitation coil multi-electrode electromagnetic correlation flow meter sensor, which can specifically comprise: a measuring tube, two sets of excitation structure components, two sets of array detecting electrode components, and an insulating lining, wherein the two sets of excitation structure components are vertically distributed with each other and are arrangedon the same circumference parallel to the outer wall of the measuring tube; furthermore, the two mutually perpendicular sets of excitation structure components cooperate to produce two vector magneticfields which are uniform and mutually perpendicular; the two sets of array detecting electrode components are located in the two mutually perpendicular vector magnetic fields generated by the two sets of excitation structure components, and are arranged, in the measuring tube, on two sections of the upstream and downstream in the flow direction thereof; the mutual spacing of the two sections in the axial direction of the measuring tube is L; and the insulating lining is arranged on the inner tube wall of the measuring tube. The two-set excitation coil multi-electrode electromagnetic correlation flow meter sensor can effectively realize horizontal well production profile fluid flow measurement containing non-conductive materials which are especially in non-axisymmetric flow field distribution.

Description

technical field [0001] The invention relates to oilfield logging measurement technology, in particular to a flowmeter sensor of double-set excitation coil and multi-electrode electromagnetic correlation method. Background technique [0002] In recent years, due to its unique characteristics and advantages, traditional electromagnetic flowmeters have been widely used in the field of flow measurement of single-phase flow and two-phase flow with high water content. However, when measuring the flow rate of a multiphase flow containing a certain concentration of non-conductive substances, the output signal of the sensor will fluctuate greatly, which will seriously affect the measurement results and cause large errors. For example, the electromagnetic flowmeter sensors involved in patents CN1731106A, CN100491928C, and CN1928507A, etc., use a set of excitation coils and combine double-excitation electromagnetic flow technology, and can realize the measurement of partial flow in one...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a double-set excitation coil multi-electrode electromagnetic correlation method flowmeter sensor to overcome the multiphase flow in the prior art that the production profile of the horizontal well contains non-conductive substances and especially has non-axisymmetric flow field distribution characteristics. Difficulties in flow measurement

Images