Application of Absorption NIR Spectroscopy in Multiphase Flow Measurement

About the authors:

Sergey G. Nikulin, Head of the Basic Department of Oil and Gas Flow Measurement, University of Tyumen; s.g.nikulin@utmn.ru

Evgeny V. Zaitsev, Postgraduate Student, Department of Mechanics of Multiphase Systems; Engineer, Basic Department of Oil and Gas Flow Measurement, Physicotechnical Institute, University of Tyumen; welin151992@mail.ru

Lyudmila A. Puldas, Cand. Sci. (Tech.), Associate Professor, Heatgas Supply and Ventilation Department, Industrial University of Tyumen; eLibrary AuthorID, puldasla@tyuiu.ru

Abstract:

The article considers the problem and its causes of multiphase flow measurement of production wells. The paper presents the fundamental possibility of NIR spectroscopy application in a multiphase flow measurement of hydrocarbons, in particular, in determining the volume ratio of water, oil and gas in the flow gas-liquid mixture. The main advantages, drawbacks and limitations of this approach are presented. The current state of the application of near infrared radiation in multiphase flow measurement is analyzed. The theoretical bases of NIR spectroscopy are described. The method of determining the volume fractions of the phases in water-gas-oil stream bused on absorption NIR spectroscopy is proposed. The key features for the selection of required wavelengths used in the proposed method are described. Studies of the oil-water emulsions on a double-beam NIR spectrometer were made, which resulted in acquisition of the absorbance spectra of several samples. The comparison of the experimental and calculated absorbance spectra was carried out, which confirmed the validity of the proposed NIR method application for the determination of the volume fractions of the phases in the flow gas-liquid mixture.

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