Online detection device for wellhead water content of high-water-containing oil well

Abstract

The invention provides an online detection device for wellhead water content of a high-water-containing oil well. The online detection device comprises a separation cavity, wherein a mixed liquid inlet is arranged at the lower part of the separation cavity, a gas-phase flow outlet is formed in the top of the separation cavity, and a separation liquid outlet is formed in the bottom of the separation cavity; separation liquid flows out through gravity and pipeline pressure; the separation cavity is internally provided with a floating ball; the gas-phase flow outlet and the separation liquid outlet are connected with an oil conveying pipeline; a water content detection sensor is arranged on a connection pipeline of the separation liquid outlet and the oil conveying pipeline; three-phase flow mixed liquid enters the separation cavity from a mixed liquid inlet through a flow line slide slope; gas-phase flow moves upwards to enter a gas cabin and is finally returned back to the oil conveying pipeline; separation liquid flows down and is slowly separated; the gas-phase flow continually moves upward to be more completely separated through movement of the liquid in the distance from the separation cavity to the separation liquid outlet; after being detected, the separation liquid flowing out from the separation liquid outlet finally enters the oil conveying pipeline; and whole equipment does not generate environment pollution in a utilization process, and the measurement precision of the high water content detection sensor is extremely improved.

Description

technical field [0001] The invention belongs to the technical field of crude oil production and sales detection, and in particular relates to an online detection device for water content at the wellhead of a high water-cut oil well. Background technique [0002] In the petroleum industry, the water content of crude oil is an important indicator, through which the water level of the oil well and the position of the oil layer can be predicted; the crude oil output and production value can be estimated, the degree of recovery can be predicted and the corresponding production plan can be formulated, and the development life of the oil well can be predicted. Very important. It has a major impact on crude oil extraction, gathering and transportation, dehydration, metering, sales, refining, etc. In oilfield production, it is necessary to accurately and timely understand the water content of crude oil, use the water content of crude oil to estimate the working status of oil wells, p...

AI Technical Summary

Problems solved by technology

However, the crude oil produced is basically a three-phase flow composed of solid, liquid, and gas, which has a great impact on the measurement of the water content of crude oil, and the measured data is seriously distorted.

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