NDLI: Downhole viscosity measurement platform using tuning fork oscillators

Content Provider	IEEE Xplore Digital Library
Author	Gonzalez, M. Ham, G. Al Haddad, A. Bernero, G. Deffenbaugh, M.
Copyright Year	2015
Description	Author affiliation: Dept. of Electr. Eng. & Comput. Sci., Univ. of Michigan, Ann Arbor, MI, USA (Al Haddad, A.) \|\| Aramco Res. Center, Aramco Services Co., Houston, TX, USA (Gonzalez, M.; Ham, G.; Bernero, G.; Deffenbaugh, M.)
Abstract	The viscosity of subsurface hydrocarbons is commonly determined by sampling produced fluids at the surface. However, bringing hydrocarbons to surface temperature and pressure can irreversibly alter their viscosity. There are wireline tools that make in-situ measurements, but these require long, heavy cables, specialized equipment and large service crews, making the process logistically challenging and expensive. In this paper we describe a novel sensor system for downhole measurements of viscosity, density, and other fluid properties. The sensing capabilities are realized by the use of a commercially available piezoelectric tuning fork oscillator, which probes the fluid through the interaction of its prongs with the boundary layer of fluid around it. The miniature footprint of the device allows us to integrate it into a small-scale untethered tool that can be easily deployed for well logging. We show our implementation and laboratory characterization of the tuning fork. To gauge its capabilities under harsh environmental conditions, the sensor was studied while immersed in fluids representative of those found downhole and, separately, under conditions of high pressure and temperature. The tool integration and measurement schemes are also described. This system is a first step toward the development of an inexpensive, integrated, and miniaturized sensing platform for the in-situ characterization of reservoir fluids.
Sponsorship	IEEE
Starting Page	1
Ending Page	4
File Size	453034
Page Count	4
File Format	PDF
e-ISBN	9781479982035
DOI	10.1109/ICSENS.2015.7370266
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-11-01
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Oscillators Temperature measurement Vibrations Viscosity Frequency measurement Density measurement tuning fork oscillators Viscosity sensor density sensor fluid characterization oil and gas downhole measurements wireline logging untethered logging electromechanical resonators
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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