Intelligent water content detecting device for wellhead

Abstract

The invention discloses an intelligent water content detecting device for a wellhead. The intelligent water content detecting device comprises a production pipeline and a metering pipeline which communicates with the production pipeline, wherein an inlet end of the metering pipeline communicates with an inlet of the production pipeline through a three-way valve; an outlet of the metering pipelinecommunicates with an outlet of the production pipeline through a valve; a heating device is arranged on the outer side wall of the metering pipeline; and a detector which extends to the lower end of the metering pipeline from the upper end of the metering pipeline and is distributed with a plurality of water-oil sensors is mounted at the inner side of the metering pipeline. The intelligent water content detecting device avoids inaccurate sampling through an integral sampling mode of the metering pipeline, can be used for directly heating the metering pipeline, and prevents a probe from the scaling problem and the wax-precipitating problem. An oil-water interface of a sealing tube section is measured through the water-oil sensors, so that influences, on water content measuring, of an oil-in-water state and a water-in-oil state are prevented.

Description

technical field [0001] The invention relates to the technical field of oil-water interface measuring equipment, in particular to an intelligent wellhead water detection device. Background technique [0002] At present, the water content of crude oil at the wellhead of oil production wells is mainly monitored by manual sampling and testing. Special sampling personnel, laboratory personnel, vehicles and related laboratory consumables need to be arranged for testing. Long-term sampling and testing to determine the water content of crude oil is a big challenge for oil fields. cost consumption. When the water cut analyzer is directly used for measurement, the measurement results are greatly affected by the associated gas, resulting in large measurement errors, which cannot truly and accurately reflect the actual changes in the water cut of the oil well. There are mainly the following problems in the measurement of crude oil by traditional equipment: (a) The influence of crude oi...

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Problems solved by technology

[0002] At present, the water content of crude oil at the wellhead of oil production wells is mainly monitored by manual sampling and testing. Special sampling personnel, laboratory personnel, vehicles and related laboratory consumables need to be arranged for testing. Long-term sampling and testing to determine the water content of crude oil is a big challenge for oil fields. cost consumption

When the water cut analyzer is directly used for measurement, the measurement results are greatly affected by the associated gas, resulting in large measurement errors, which cannot truly and accurately reflect the actual changes in the water cut of the oil well.

Traditional equipment mainly has the following problems in the measurement of crude oil: (a) The influence of crude oil composition changes on the measurement results, the gas content, produced water salinity and oil composition changes have a certain impact on the measurement results

Although the existing test level and test accuracy can meet the calibration requirements of the instrument, due to various factors such as changes in the flow state, changes in the composition of the measured medium, the amount of gas contained, sampling methods, and human factors, the representative sampling influence, so that the final calibration value does not cover the various states of the fluid flowing in the pipeline

Often the results calibrated according to this value only reflect the situation of the sampling point, and cannot represent the real crude oil situation of the entire actual site

This incorrect calibration is also an important factor that the currently used crude oil water content measurement instruments cannot effectively guarantee accurate measurement in the entire measurement range

[0003] It can be seen that when traditional measuring equipment measures the water content of oil-water mixture, the measurement results are inaccurate, the measurement error is large, the measurement results are unstable, the instrument is easily damaged, and it cannot truly reflect the situation of the crude oil in the measurement pipeline.

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