On-line metering device and metering method for flow rate of oil, gas and water phase

Abstract

The invention discloses a novel oil-gas-water-phase flow on-line metering device, comprising a Y-type filter, a rectifier, a detection tube, a temperature-pressure integrated sensor, a throttle mechanism, a transition tube, a high-precision differential pressure gauge, and a water content analyzer. The new online metering device for oil and gas water phase flow does not use separate metering, simple structure, small footprint, easy installation, does not use gamma ray method to calculate gas content, reduces the harm caused by rays to the environment, and the service life of the device It is long and low in cost. The differential pressure device and the water content meter are integrated into a single device as a separate module, which is more convenient to install. This new online measurement method of oil and gas water phase flow adopts the traditional differential pressure method to establish a mathematical model. Theoretical It is relatively strong and has a relatively high degree of technological maturity. Through a large number of experiments to optimize the model, the calculation of the oil-gas-water three-phase hold-up and the phase separation flow rate is relatively accurate.

Description

technical field [0001] The invention belongs to the field of multiphase flow flow measurement, and in particular relates to a novel on-line measurement device and measurement method for the flow of oil, gas and water phases. 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 output fluid of the oil well to 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, which cannot meet the needs of automatic management of oilfield production. The online measurement method can improve the automation level of oilfield production and realize the real-time monitoring function, but most of the current...

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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 by 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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