Solid Particle Deposition During Turbulent Flow Production Operations

Abstract

Thb papar wss 801SCtOdfor prasantation by an SPE Program CAmmlttaa fallowing mvlcnv of informatbn contained k! an sbstrsct submnted by the author(a) Contents of the pspmr, --nt'sd, ha~I@~n M~w'@ by tha M@fy of F'evdeum Ewhwefsand are skq.ct to comsdon by the authmls). Tfw material, M vsanted, dws not nacnSwlly leffaci any pasltion of fhe Sccioty of Petrd.sum Engineers its ofiivws, of rnembws, Papers presentad at SPE maetlngs we subject to publication rwlw by Edtfwlal~mHtW8 of the Sccwfy of Petrolaum Enghwers. Pwmbslrm to q is r.sstrlckl to an sbstrwt of not more than s00 words, Illustrations may not bs c@e4 llw abstmef thwld sontaln cor@ctscus eckrwwfadgnwnt of where and by whom the psper is praaentsd. Wrlta Librarian, SPE, P O sax S3StIW Rlchsrd am, TX 7~, U.S.A. TObX, tSSZ45 SPEUT. ABSTRACTThe production and transportation of petroleum fluids could be severely affected by deposition of suspended particles (i.e. asphaltene, paraffin/wax, sand, and/or diamondoid) in the production wells and/or transfer pipelines. In many instances the amount of precipitation is rather huge causing complete plugging of these conduits, Therefore, it is important to understand the behavior of suspended particles during flow conditions. In this paper we present an analysis of the diffusional effects on the rate of solid particle deposition during turbulent flow conditions (crude oil production generally falls within this regime). The turbulent boundary layer theory and the concepts of mass transfer have been utilized to csfculate the particle deposition rates on the walls of the flowing conduit. The developed model accounts for the eddy and Brownian diffusivities as well as for inertial effects.The analysis presented in this paper shows that rates of solidparticle deposition (during crude oil production) on the walls of the flowing channel due solely to diffusional effects are small, k is also shown that de~sition rates decrease with increasing particle size, However, when the process is momentum controlled (large particle sizes) higher deposition rates are expected.References and Illustrations al end of pa~r

Linking Larval Supply to Recruitment: Flow-Mediated Control of Initial Adhesion of Barnacle Larvae

“…improvisus cyprids. Deposition rates calculated from the model of Escobedo and Mansoori (1995) produced a similar positive relationship with flow speed but predicted contact rates were three times higher than for our model (data not shown).…”

“…A derivation of the full model is found in . The model results were compared to predictions from a more complex particle deposition model (Escobedo and Mansoori 1995).…”

Investigation of Asphaltene Deposition and Precipitation in Production Tubing

“…Escobedo and Mansoori [21] studied the mechanism of migration of suspended heavy organic particles towards the walls in oil producing wells and pipelines by analyzing the diffusional effect on the solid particle deposition during turbulent flow condition. They presented a new expression of the transport coefficient for particles with different dimensionless stopping distance and reported the transport coefficient decreases with increasing crude oil kinematic viscosity.…”

Modeling of Sand and Crude Oil Flow in Horizontal Pipes during Crude Oil Transportation

“…where 1 = diffusivity associated with 100% concentration, [12], within the limit of the sublaminar layer of fluid, + ≤ 5 and the eddy diffusivity was evaluated using…”