Novel oil-gas-water split-phase flow online metering device and novel oil-gas-water split-phase flow online metering method

Abstract

The invention discloses a novel oil-gas-water split-phase flow online metering device and a novel oil-gas-water split-phase flow online metering method. The novel oil-gas-water split-phase flow onlinemetering device comprises a Y-shaped filter, a flow straightener, a detection pipe, a temperature and pressure integrated sensor, a throttling mechanism, a transition pipe, a high-pressure differential pressure gauge and a water content analyzer. The novel oil-gas-water split-phase flow online metering device and the novel oil-gas-water split-phase flow online metering method have the advantagesthat separate metering is omitted, and accordingly the novel oil-gas-water split-phase flow online metering device is simple in structure, small in occupied area and convenient to mount; gamma ray processes for computing gas contents are omitted, accordingly, environmental hazards due to rays can be reduced, and the novel oil-gas-water split-phase flow online metering device is long in service life and low in cost; differential pressure devices and water content instruments are integrated on the single novel oil-gas-water split-phase flow online metering device by independent modules, and accordingly the novel oil-gas-water split-phase flow online metering device can be conveniently and quickly mounted; mathematical models are built by the aid of the traditional differential pressure processes, and accordingly the novel oil-gas-water split-phase flow online metering method is high in theoretical property and technical maturity; models are optimized by the aid of large quantities of experiments, and accordingly oil-gas-water three-phase contents and split-phase flow which are computed by the aid of the novel oil-gas-water split-phase flow online metering device and the novel oil-gas-water split-phase flow online metering method are high in accuracy.

Description

technical field [0001] The invention belongs to the field of multiphase flow flow measurement, and in particular relates to a novel oil-gas-water phase flow on-line metering device and a metering method. Background technique [0002] In the process of crude oil extraction, in order to grasp the dynamic changes of the oil field, it is necessary to continuously measure the flow rate of each component in the oil well output fluid and provide real-time measurement data. [0003] At present, crude oil measurement methods are mainly divided into manual measurement and online measurement. The manual method is simple to operate, but has disadvantages such as poor sampling representativeness, poor continuity and time-consuming, and cannot meet the needs of automatic management of oilfield production. Online measurement methods can improve the automation level of oilfield production and realize real-time monitoring functions, but most of the current products have problems such as poo...

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Problems solved by technology

Murdock, James, Chisholm, Smith, Lin, Steven and Steven and Hall conducted theoretical and experimental research on the measurement model of gas-liquid two-phase flow in differential pressure flowmeters, and obtained a series of semi-empirical measurement models. The metering has been greatly improved, but the model often depends on another important parameter of gas-liquid two-phase flow, mass gas holdup, which is the most important part of phase separation metering. At present, the measurement of gas holdup of most manufacturers mostly relies on In the field of oil field application, this kind of radiation is forbidden to use, and the cost of such products is high

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