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System and method for measuring split-phase volume fraction of oil-gas-water multi-phase fluid in oil production well logging

A multi-phase fluid and measurement system technology, which is applied in the field of oil-gas-water multi-phase fluid separation phase holdup measurement system, can solve the problems of low measurement efficiency, large measurement error of acoustic method, complex tomography technology, etc. defects, reduce measurement errors, and overcome the inability to achieve oil-water detection

Active Publication Date: 2019-09-24
YANSHAN UNIV
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Problems solved by technology

[0004] However, due to the complex and changeable environment of the oil well, among the existing multiphase flow holdup measurement methods, the acoustic method has a large measurement error; the optical method has a sensitive response and small volume, but the sensor is difficult to process and can only achieve gas-liquid phase measurement at present. ; The tomographic imaging method is complex in technology, large in size, and low in measurement efficiency; the electrical method and the capacitance method are greatly affected by interference, corrosion, and scaling. There is still room for further development

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  • System and method for measuring split-phase volume fraction of oil-gas-water multi-phase fluid in oil production well logging
  • System and method for measuring split-phase volume fraction of oil-gas-water multi-phase fluid in oil production well logging

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Embodiment Construction

[0051]The object of the present invention is to provide a kind of oil-gas-water multiphase fluid phase-separation holdup measurement system and method in petroleum production logging, to realize the measurement of oil-gas-water multiphase fluid phase-separation holdup downhole.

[0052] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0053] Soft-sensing technology is of great significance in the measurement of phase separation and holdup of oil-gas-water multiphase fluids. Among them, the soft-sensing technology that takes the internal relationship and mutual influence between variables into account in multivariate statistical analysis technology is widely used in multiphase flow detection. .

[0054] Optical fiber probe measurement belongs to the contact probe method, which can b...

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Abstract

The invention provides a system and method for measuring split-phase volume fraction of oil-gas-water multi-phase fluid in oil production well logging. According to the system for measuring the split-phase volume fraction of the oil-gas-water multi-phase fluid in oil production well logging, a light signal reflected by oil well underground petroleum is converted to an electric signal through a multi-receiving-end optical fiber probe sensor, and the electric signal is transmitted to a data processing analysis system through a data collection system. According to the data processing analysis system, through a clustering network model from comprehensive feature parameters to the oil-gas-water multi-phase fluid, according to the comprehensive feature parameters obtained by feature extraction and normalization processing carried out on a voltage signal detected by the multi-receiving-end optical fiber probe sensor, split-phase volume fraction information of the oil well underground oil-gas-water multi-phase fluid is obtained, measurement error of split-phase volume fraction of the oil well underground oil-gas-water multi-phase fluid is reduced, and the technical defect that an optical fiber method cannot realize oil-water detection is overcome.

Description

technical field [0001] The invention relates to the field of petroleum exploration, in particular to a system and method for measuring the phase-separated holdup of oil-gas-water multiphase fluid in petroleum production logging. Background technique [0002] The oil wells in the mid-to-late development stage have a high water content, and in the deep reservoir area of ​​the oil well, the gas mainly exists in the crude oil in the form of dissolved gas. During the upward flow of the crude oil, the gas gradually precipitates as the pressure decreases. Flow characteristics of oil-gas-water multiphase fluids are formed in oil wells. In addition, in order to improve the recovery factor, water injection and gas injection flooding and recovery technologies are widely used in major oil fields. As a result, the flow phenomenon of gas-liquid, oil-water and oil-gas-water multiphase flow is very common in the process of oil production and development. In this case, it is necessary to m...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/08
CPCE21B49/08E21B49/0875
Inventor 孔令富陈基亮孔德明孔维航崔永强李军孔德瀚郝虎张世辉杨韵桐何大川张晓丹仲美玉
Owner YANSHAN UNIV
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