This paper discusses a new downhole logging instrument that measures three-phase flow in horizontal and highly deviated wells. The focus is on the instrument design features, and the measurement techniques that produce the three-phase holdup and velocity measurements. Signals from a two dimensional array of capacitive sensors are measured, and subsequent processing determines the volume fraction and velocity of each component of the borehole flow. The design incorporates an array of capacitive sensors that span the wellbore. Since two orthogonal electrical signals are used to excite local fluid elements, it is possible to determine the fluid capacitance or the volume fraction of conductive fluid in the vicinity of each sensor. Holdups are calculated from these sensor outputs. Velocities are calculated by correlating outputs from adjacent sensors. Measurement concepts and instrument characterization are demonstrated with flow loop data. [S0195-0738(00)00802-5]

Issue Section:
Technical Papers
Keywords:
petroleum industry, instrumentation, velocity measurement, phase control, pipe flow, capacitive sensors
Topics:
Flow (Dynamics), Fluids, Instrumentation, Sensors, Wells, Velocity measurement, Water, Capacitance
1.
Den Boer, J. J., Inventor, 1992, “Method and Apparatus to Measure Multi-Phase Flow Properties,” European Patent Application No. 0 510 774 A2, Shell International Research Maatschappij B. V.
2.
Morrelli, J. D., et al., Inventors, 1997, “Determination of the Watercut of a Multiphase Flow Directly From Measured Microwave Frequency Dielectric Properties,” U.S. Patent No. 5,625,293.
3.
Jandrasits, W. G., and Kikta, T. J., Inventors, 1998, “Method and Apparatus for Probing Relative Volume Fractions,” U.S. Patent No. 5,729,123, U.S. Dept. of Energy.
4.
van der Spek, A., and Thomas, A., 1998, “Neural Net Identification of Flow Regime using Band Spectra of Flow Generated Sound,” SPE European Petroleum Conference, The Hague, The Netherlands, Oct. 20–22.
5.
Chace, D. M., Trcka, D. E., Georgi, D., Bousche, O., van der Spek, A., and Nasser, H., 1998, “A New Production Logging Service for Horizontal Wells,” Soc. Prof. Well Log Analysts 39th Ann. Logging Symposium, Paper H.
6.
Chace
,
D. M.
,
Trcka
,
D. E.
,
Wang
,
J.
,
Bousche
,
O.
,
van der Spek
,
A.
, and
Nasser
,
H.
,
1998
,
The New Age of Production Logging
,
Depth Magazine
,
4
, No. 2.
7.
Kostelnicek, R., and Reittinger, P., Inventors, 1999, “Dual-Transmitter Multi-Capacitance Flowmeter,” US Patent Pending, Baker Atlas, Houston, TX.
8.
Sherman, Philip, ed., 1968, Emulsion Science, Academic Press, New York, NY.
Copyright © 2000
 by ASME
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