On-Line Measurement Method of Multiphase Flow in Oil Wells by NMR

Li-pin, LI; Huang, Yan-qun; Yuan, Jing-feng; Tong, Mei-shuai

doi:10.1007/978-981-15-2485-1_154

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…In this work, the equivalent conductivity σ m (not normalized voltage V n ) is used as the input of the image reconstruction algorithm to get a distinct distribution of conductivity [16]. From (8) ,σ m can be calculated as:…”

Section: Image Reconstructionmentioning

confidence: 99%

“…Radiation methods have the advantages of high measurement accuracy and good stability, but there are safety issues for the human body and the environment, as well as high costs [7]. The NMR methods can be used to measure water content in twophase oil-water streams [8], but it is relatively expensive and requires high safety precautions. Optical methods measure the phase fraction by measuring the attenuation of light intensity after it passes through a medium [9].…”

Section: Introductionmentioning

confidence: 99%

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Measurement of the water-to-liquid ratio of oil–water two-phase flow for low flow rates and high water content

Huang,

Chen,

Song

et al. 2024

Meas. Sci. Technol.

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Oil-water two-phase flow is widely present in the petroleum industry,and the vast majority of oilfields have entered the period of exploitation underhigh water content. Accurate measurement of water-to-liquid ratio (WLR) iscrucial to oil production. Currently, there are fewer works related to the WLRmeasurement at high water content and low flow rates. In order to get a completepicture of WLR measurement in this context by electrical resistance tomography(ERT) sensors, dynamic experiments with a total flow rate not exceeding 4m3h−1were conducted. These dynamic experiments considered the influence of thedirection of the test pipelines, the inner diameter of the ERT sensor and theconductivity of the water. According to the relative positions of the measurementand excitation electrode pairs of the ERT sensor, different strategies for WLRcalculation were established. This paper presents all results of the experiments ofthe WLR measurement. Especially, image reconstruction at different flow rateswas conducted, as a way to qualitatively reflect the mixing of oil and water,thus helping to understand the WLR measurements. The whole work revealsthe regularities of the WLR measurement by ERT, and provides a reference forsubsequent work to realize the WLR accurate measurement in oil-water two-phaseflow at high water content and low flow rates.

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Section: Image Reconstructionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Measurement of the water-to-liquid ratio of oil–water two-phase flow for low flow rates and high water content

Huang,

Chen,

Song

et al. 2024

Meas. Sci. Technol.

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The Nuclear Magnetic Flowmeter for Monitoring the Consumption and Composition of Oil and Its Complex Mixtures in Real-Time

2022

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The necessity of increasing the efficiency of primary oil purification in a drilling station or an offshore platform has been substantiated. We consider the problems that arise during the primary processing of oil mixtures. Important conditions for increasing the efficiency of primary purification (separation) of oil mixtures include measuring the consumption and determining the content of various impurities (water, undissolved particles) and air in them, with an error of no more than 2%. We analyzed the possibilities of using various designs of flowmeters to measure the consumption of the oil mixture coming from a well. It is also necessary to use other measuring instruments to control the state of this mixture, which creates additional problems (searching for an appropriate locations to place them, providing the required operating conditions). Various designs of nuclear magnetic flowmeters–relaxometers were considered, making it possible to measure the consumption of a liquid medium and its times of longitudinal T1 and transverse T2 relaxation with one device. The measured values of T1 and T2 determine the state of the medium. The design of the industrial nuclear magnetic flowmeter–relaxometer M-Phase 5000, which is used to control the flow and quality of oil and oil products, was considered in more detail. Problems were identified that did not allow using this design of a nuclear magnetic flowmeter–relaxometer in a drilling rig or offshore platform. A new design of a nuclear magnetic flowmeter–relaxometer was developed, implementing the methods for measuring q, T1, and T2. These methods and various technical solutions make it possible to use this device at a drilling station or offshore platform. The measurement errors of the consumption q, T1, and T2 were determined. The results of various media studies are presented and compared with q, T1, and T2 measurements on other devices and measured volume (to confirm the adequacy of q measurements). The application scopes of the developed nuclear magnetic flowmeter–relaxometer were determined, in addition to the systems of primary oil processing.

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On-Line Measurement Method of Multiphase Flow in Oil Wells by NMR

Cited by 2 publications

References 14 publications

Measurement of the water-to-liquid ratio of oil–water two-phase flow for low flow rates and high water content

Measurement of the water-to-liquid ratio of oil–water two-phase flow for low flow rates and high water content

The Nuclear Magnetic Flowmeter for Monitoring the Consumption and Composition of Oil and Its Complex Mixtures in Real-Time

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