Automatic multi-phase flow collecting and metering system

Abstract

The invention discloses an automatic multi-phase flow collecting and metering system, and relates to the technical field of oilfield exploitation, in particular to the automatic multi-phase flow collecting and metering system which comprises a prefabricated pressure setting mechanism, a gas-liquid separation mechanism, a gas metering mechanism, a solid-liquid separation mechanism, a liquid metering mechanism, a liquid collecting mechanism, a connecting pipe, a mounting base and a mounting support. The prefabricated pressure setting mechanism comprises a back pressure power source, a high pressure buffer and a back pressure valve which are connected end to end through connecting pipes. According to the automatic multi-phase flow collecting and metering system, multi-phase fluid is sequentially guided into a gas-liquid separator and a centrifugal solid-liquid separator along the back-pressure valve through the prefabricated pressure setting mechanism, solid-liquid-gas separation of the multi-phase fluid can be achieved, the gas-phase fluid and the liquid-phase fluid can be metered through the gas metering mechanism and the liquid metering mechanism, the automation degree is improved, the labor intensity of workers is reduced, and meanwhile, solid and liquid are separated through the centrifugal solid-liquid separator and then metered.

Description

technical field [0001] The invention relates to the technical field of oilfield exploitation, in particular to an automatic collection and metering system for multiphase flow. Background technique [0002] Oil is a fluid mineral buried deep in the ground. At first, people called the oily liquid minerals produced in nature petroleum, the combustible gas natural gas, and the solid combustible fuel minerals bitumen. With the in-depth study of these minerals, it is realized that they are all hydrocarbon compounds in composition and are related to each other in origin, so they are collectively called petroleum. Petroleum is an important energy source. Compared with coal, it has the advantages of high energy density (combustion heat of equal weight petroleum is 50% higher than that of standard coal), convenient transportation and storage, and less pollution to the atmosphere after combustion. Fuel oil extracted from petroleum is the main fuel for various kilns in transportation ...

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Problems solved by technology

[0004] At present, the laboratory adopts the conventional production metering method. Generally, a condenser is installed at the outlet of the overflow model to cool the production fluid, and the multiphase fluid produced enters the back pressure control valve system through the pressure-bearing pipeline. During the collection process It requires staff to replace the collection tube from time to time, and the operation is cumbersome, which leads to excessive labor intensity of the staff, high temperature of the collection liquid, and certain safety hazards when the staff manually operates. In addition, the existing production measurement method , collect the collection liquid in the collection tube, and then measure it. The gas components in the collection liquid will volatilize outward, resulting in poor measurement accuracy. At the same time, the collection liquid may be mixed with solid impurities, which further leads to poor measurement accuracy. Therefore, we propose a multiphase flow automatic acquisition and measurement system to solve the above-mentioned problems

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