Solids transport in multiphase systems falls under the umbrella of “flow assurance.” Unlike issues such as waxes and hydrates, solids transport has received relatively little attention to date. This is especially true for solids transport in high-viscosity fluids such as Venezuelan crude, where viscosities around the 300–400-cP mark are commonly encountered. This paper describes some experiments performed on the BP Amoco 6-in. multiphase flow test facility located at Sunbury. These looked at the transport of field representative sand through a pipeline dip. Several fluids were selected for these experiments to examine the influence of liquid viscosity on the results. These were water, oil, and two different carboxymethylcellulose solutions (150 and 300 cP). These experiments showed that, in slug flow, water and low-viscosity oil were able to transport the sand uphill, whereas neither high-viscosity solution was able to transport the solids. This feature was examined in comparison to the model for solids transport in near-horizontal pipes discussed in this paper. Three-phase flow experiments (water-oil-air) were also performed to investigate the effect of oil or water prewetting of the solids on solids transport. If prewetted by water, the sand could not be moved by oil slugs. Once water was added to the system, the sand became increasingly mobile.

Issue Section:
Technical Papers
Keywords:
oil technology, multiphase flow, viscosity, water, transport processes, pipe flow, wetting, sand
Topics:
Cathodic protection, Flow (Dynamics), Particulate matter, Sands, Solids, Viscosity, Water, Multiphase flow, Fluids, Slug flows, Pipes
1.
Oudeman, P., 1993, “Sand Transport and Deposition in Horizontal Multiphase Trunklines of Subsea Satellite Developments,” Offshore Technology Conf., Houston, TX, May 6–9.
2.
Gillies
,
R. G.
,
McKibben
,
M. J.
, and
Shook
,
C.
,
1997
, “
Pipiline Flow of Gas, Liquid and Sand Mixtures at Low Velocities
,”
J. Can. Pet. Technol.
,
36
, No.
9
, pp.
36
–
42
.
3.
Gillies, R. G., Shook, C., Kristoff, B., and Parker, P., 1994, “Sand Transport in Horizontal Wells,” 11th Annual Calgary University Heavy Oils and Oil Sands Technology Symposium, Canada, March 2.
4.
Tippets, J. R., and Priestman, G. H., 1997, “Mobility of Solids in Multiphase Undulating Pipeflow,” 7th Int. Conf. on Multiphase Production, Cannes, France, June 18–20.
5.
Holte, S., Angelsen, S., Kvernhold, O., and Ræsder, J. H., 1987, “Sand Bed Formation in Horizontal and Near Horizontal Gas-Liquid-Sand Flow,” European Two-Phase Flow Group Meeting, Tronheim, Norway, June.
6.
Angelsen, S., Kvernhold, O., Lingelem, M., and Olsen, S., 1989, “Long Distance Transport of Unprocessed HC Sand Settling in Multiphase Flowlines,” 4th Int. Conf. on Multiphase Flow, Nice, France, June 19–21.
7.
Thomas
,
D.
,
1962
, “
Transport Characteristics of Suspensions Part IV
,”
AIChE J.
,
8
, pp.
373
–
378
.
8.
Beggs
,
H. D.
, and
Brill
,
J. P.
,
1973
, “
A Study of Two-Phase Flow in Inclined Pipes
,”
JPT, J. Pet. Technol.
,
255
, pp.
607
–
617
.
9.
Taitel
,
Y.
, and
Dukler
,
A. E.
,
1976
, “
A Model for Predicting Flow Regime Transitions in Horizontal and Near-Horizontal Gas-Liquid Flow
,”
AIChE J.
,
22
, pp.
47
–
55
.
10.
Rix, S. J. L., 1992, “The Conveying of Sand by Two-Phase Flows in Horizontal and Inclined Pipes,” Part II Research Project Report, Department of Chemical Engineering, University of Cambridge, Cambridge, UK.
11.
Fairhurst, C. P., and Barrett, N., 1997, “Oil/Water/Gas in Undulating Pipelines–Field Observations, Experimental Data and Hydraulic Model Comparisons,” SPE Annual Technical Conf. and Exhibit., San Antonio, TX, October 5–8.
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