IR-Method for Determining the Water Contents in a Water-Oil Emulsion Flow

Tyumen State University Herald. Physical and Mathematical Modeling. Oil, Gas, Energy


Release:

2018, Vol. 4. №1

Title: 
IR-Method for Determining the Water Contents in a Water-Oil Emulsion Flow


For citation: Zaytsev E. V., Nikulin S. G., Shuvaev A. N. 2018. “IR-Method for Determining the Water Contents in a Water-Oil Emulsion Flow”. Tyumen State University Herald. Physical and Mathematical Modeling. Oil, Gas, Energy, vol. 4, no 1, pp. 110-121. DOI: 10.21684/2411-7978-2018-4-1-110-121

About the authors:

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

Sergey G. Nikulin, Head of the Basic Department of Oil and Gas Flow Measurement, Physicotechnical Institute, University of Tyumen; ogmetr72nm@mail.ru

Anatoly N. Shuvaev, Dr. Sci. (Tech.), Professor, Industrial University of Tyumen; anshuvaev46@mail.ru

Abstract:

The problem of moisture meter of water and gas streams remains unsolved yet, though its urgency is growing. The existing methods for determining the moisture content in the gas-liquid mixture stream have intractable shortcomings and limitations. In addition, the accuracy of existing methods depends heavily on many factors (including water salinity, grade of oil, dispersity and uniformity of the flow, among others) and often does not meet modern requirements.

This article reviews the methods for determining the moisture content of crude oil, which have received the greatest practical application, giving their main shortcomings. The authors focus on the IR-method and its place in the moisture meter of water-oil streams in more detail, describing the theoretical bases of its application. The advantages of the IR-method and its main limitation are given, as well as a method for eliminating this restriction.

This study aims to test the IR-method for determining the moisture content on a real water-oil flow of an emulsion and determining the appropriateness of its application. The authors have done an experiment to test this method at the pouring stand at the watercut points from 0 to 90% in steps of 10%. Based on the regression equation obtained, the water cut values at the control points have been calculated and compared with the true values. The maximum reduced error was 11%. The obtained results confirm the expediency of using the IR-method for determining the moisture content in the crude oil stream. In addition, the experiment has shown that it is inappropriate to use wavelengths with large absorption coefficients, as it requires limiting the thickness of the translucent layer to the values of no more than 1 mm.

References:

  1. Abramov G. S. 2013. “Analiz raskhozhdeniy pokazateley obvodnennosti produktsii neftyanykh skvazhin, izmerennykh potochnymi vlagomerami, s laboratornymi rezul’tatami analiza prob” [Analysis of the Discrepancies in the Indices of Water-Cut in Production of Oil Wells, Measured by Flow Hygrometers, with Laboratory Results of Sample Analysis]. Avtomatizatsiya, telemekhanizatsiya i svyaz’ v neftyanoy promyshlennosti, Novembe, pp. 3-6.
  2. Boren K., Khafmen D. 1986. Pogloshchenie i rasseyaniya sveta malymi chastitsami [Absorption and Scattering of Light by Small Particles]. Translated from English. Moscow: Mir.
  3. Voronenko A. V., Averin V. V., Ushatkin D. E. 2014. “Pogreshnost’ izmereniya vlagosoderzhaniya v SVCh diapazone” [Measurement Error of Moisture Content in the Microwave Range]. Avtomatizatsiya, telemekhanizatsiya i svyaz’ v neftyanoy promyshlennosti, no5, pp. 10-19.
  4. Goncharov A. A., Poltoratskiy V. M., Slepyan M. A. 2008. “Metody opredeleniya obvodnennosti syroy nefti: otechestvennyy i zarubezhnyy opyt” [Methods of Determining the Watercut of Crude Oil: Domestic and Foreign Experience]. Avtomatizatsiya, telemekhanizatsiya i svyaz’ v neftyanoy promyshlennosti, no 4, pp. 54-57.
  5. Isaev M. P., Rakhimov N. R., Petrov P. V. 2011. “Razrabotka IK-datchika kontrolya vlazhnosti i soderzhaniya vody v nefti i nefteproduktakh” [Development of an IR Sensor for Monitoring Moisture and Water Content in Oil and Petroleum Products]. Interekspo Geo-Sibir, vol. 5, no 1. 
  6. Kalinina K. V., Molchanov S. S., Stoyanov N. D., Astakhova A. P., Salikhov Kh. M., Yakovlev Yu. P. 2010. “Portativnyy opticheskiy analizator soderzhaniya vody v nefti na osnove optopary ‘svetodiodnaya matritsa–shirokopolosnyy fotodiod’ srednego IK diapazona (1.6−2.4 μm)” [Portable Optical Analyzer of Water Content in Oil Based on Optocoupler “LED Matrix-Broadband Photodiode” Of Medium-Range IR (1.6-2.4 Μm)]. Zhurnal tekhnicheskoy fiziki, vol. 80, no 2, pp. 99-104.
  7. Krishchenko V. P. 1997. Blizhnyaya infrakrasnaya spektroskopiya [Near-Infrared Spectroscopy]. Moscow: Interagrotekh.
  8. Muravyov A. V., Otylov E. A. 2012. “Semeystvo izmeriteley obvodnennosti Red Eye® proizvodstva kompanii Weatherford (modeli Red Eye® 2G i Red Eye® Multiphase) i ikh primenenie” [The Family of Red Eye® Water Marking Water Meters from the Company Weatherford (Red Eye® 2G and Red Eye® Multiphase Models) and Their Application]. [NGN], no 10, pp. 64-59.
  9. Zhao Y., Yang J., Wang J.-Q., Gui F.-X. 2004. “High-Accuracy Low-Water-Content Measurement of Crude Oil Based on a Near-Infrared Spectral Absorption Method”. Optical Engineering, October, vol. 43, no 10, pp. 2216-2217.