Single well multiphase flow measuring system

Abstract

The invention relates to the technical field of multiphase flow measuring devices, and discloses a single well multiphase flow measuring system which comprises a machine body base, a three-phase separation mechanism is arranged on one side of the top of the machine body base, a pumping mechanism is installed on one side of the bottom of the three-phase separation mechanism, and a two-phase separation mechanism is connected to one side of the pumping mechanism. One side of the top and one side of the bottom of the two-phase separation mechanism are respectively connected with a first liquid phase measurement mechanism and a second liquid phase measurement mechanism. After the pumping mechanism and the two-phase separation mechanism are matched with each other, the two-phase separation mechanism with an automatic pumping function can be formed, and after the two-phase separation mechanism and the three-phase separation mechanism are used together subsequently, layered oil and water which are preliminarily separated in the three-phase separation mechanism after three-phase separation operation can be conveyed into a separation tank in the two-phase separation mechanism in a small-amplitude and stable output manner, so that large-depth oil-water mixing is avoided, and the fluid metering operation efficiency and accuracy are improved.

Description

technical field [0001] The invention relates to the technical field of multiphase flow measurement devices, in particular to a single well multiphase flow measurement system. Background technique [0002] Petroleum is a fluid mineral buried deep in the ground. At first, people called oily liquid minerals produced in nature petroleum, combustible gas natural gas, and solid combustible fuel minerals as asphalt. 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 referred to as petroleum. Petroleum includes gaseous, liquid and solid hydrocarbon compounds that exist in nature. And a complex mixture of a small amount of impurities, so oil extraction also includes natural gas extraction. [0003] At present, in the production process of oilfields, online measurement of oil-water-gas multiphase fluids is very necessary, especially offshore oilfields and on...

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Problems solved by technology

[0003] At present, in the production process of oilfields, online measurement of oil-water-gas multiphase fluids is very necessary, especially offshore oilfields and onshore oilfields have particularly large economic value, and the commonly used measurement method is to send crude oil produced by oil wells to into the three-phase separator device, the crude oil is divided into three phases of oil, water and gas through the separator, and then the flow meters installed at the outlets of each phase of the separator are used to measure the three fluids respectively. The detection is convenient and fast, but the existing three-phase separator device There is a big problem with the liquid, mainly because after the three-phase separation operation of the internal hydrocyclone, although the gas and the liquid are separated, there is no effective means for the moisture inside the gas. Moreover, after the three-phase separation operation of the hydrocyclone, The internal water and oil have been preliminarily separated, but in the subsequent transfer to the separation tank inside the three-phase separator device, a large depth of oil-water mixing occurs, which delays the subsequent fluid metering operation

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