Fiber Sweeps for Hole Cleaning
- Ramadan M. Ahmed (University of Oklahoma) | Nicholas E. Takach (University of Tulsa)
- Document ID
- Society of Petroleum Engineers
- SPE Drilling & Completion
- Publication Date
- December 2009
- Document Type
- Journal Paper
- 564 - 573
- 2009. Society of Petroleum Engineers
- 1.10 Drilling Equipment, 1.6.1 Drilling Operation Management, 1.7.2 Managed Pressure Drilling, 4.1.5 Processing Equipment, 1.7.7 Cuttings Transport, 4.6 Natural Gas, 1.11 Drilling Fluids and Materials, 5.7.2 Recovery Factors, 5.3.2 Multiphase Flow, 2.5.2 Fracturing Materials (Fluids, Proppant), 3 Production and Well Operations, 2.7.1 Completion Fluids, 1.10.1 Drill string components and drilling tools (tubulars, jars, subs, stabilisers, reamers, etc), 3.2.3 Hydraulic Fracturing Design, Implementation and Optimisation, 1.6 Drilling Operations, 2.4.3 Sand/Solids Control, 4.3.4 Scale, 1.8 Formation Damage, 2 Well Completion, 2.3.4 Real-time Optimization, 4.1.2 Separation and Treating
- rheology, hole-cleaning, sweep, hydraulics, fiber
- 7 in the last 30 days
- 985 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 10.00|
|SPE Non-Member Price:||USD 30.00|
Cuttings transport in highly deviated wellbores is more challenging and critical than in vertical wells. In inclined wells, the fluid velocity has a reduced vertical component that may not be sufficient to transport all the cuttings to the surface. When cuttings returns do not appear to be sufficient for the drilling rate, hole-cleaning sweeps are applied to clean the borehole or reduce cuttings-bed thickness. Fiber-containing sweeps have been very effective in cleaning highly deviated and extended-reach wells. In addition, substantial torque and drag reduction has been reported when fiber-containing drilling fluids are used in the field. Although field observations are encouraging, very little is known currently about flow behavior, hydraulics, and cuttings-transport efficiency of fiber sweeps.
There is a great need for understanding how fiber particles enhance the cleaning capabilities of fiber-containing sweeps. The interaction between fiber particles and drilling fluid is still not understood fully, although the improvement in cuttings and solids transport is attributed to the formation of a fiber mat network that enhances the carrying capacity of drilling fluids.
This article presents results of experimental investigations conducted to study hole-cleaning performance of a fiber sweep. Flow-loop experiments have been carried out to evaluate and compare sweep efficiencies of the fiber sweep [0.47% Xanthan gum (XG) and 0.04% synthetic fiber] and the base fluid (0.47% XG). Equilibrium bed heights were measured at different sweep flow rates in horizontal and inclined configurations. Results from this study indicate that a fiber-containing sweep has better hole-cleaning capabilities than the base fluid, even though these two sweep fluids have very similar rheological properties. Moreover, adding fiber slightly reduces annular pressure loss at the same average bed height.
|File Size||868 KB||Number of Pages||10|
Ahmed, R., Skalle, P., and Johansen, S.T. 2003. A mechanistic model todetermine the critical flow velocity required to initiate the movement ofspherical bed particles in inclined channels. Chemical EngineeringScience 58 (10): 2153-2163.doi:10.1016/S0009-2509(03)00061-7.
Azaiez, J. 1996. Constitutive equationsfor fiber suspensions in viscoelastic media. Journal of Non-NewtonianFluid Mechanics 66 (1): 35-54.doi:10.1016/0377-0257(96)01461-9.
Bivins, C.H., Boney, C., Fredd, C., Lassek, J., Sullivan, P., Engels, J.,Fielder, E.O. et al. 2005. New Fibers for Hydraulic Fracturing. OilfieldReview 17 (2): 34-43.
Brown, N.P., Bern, P.A., and Weaver, A. 1989. Cleaning Deviated Holes: NewTheoretical and Experimental Studies. Paper SPE 18636 presented at theSPE/IADC Drilling Conference, New Orleans, 28 February—3 March. doi:10.2118/18636-MS.
Bulgachev, R.V. and Pouget, P. 2006. New Experience in Monofilament FiberTandem Sweeps Hole Cleaning Performance on Kharyaga Oilfield, Timan-PechoraRegion of Russia. Paper SPE 101961, presented at the SPE Russian Oil andGas Technical Conference and Exhibition, Moscow, 3-6 October. doi:10.2118/101961-MS.
Cameron, C., Helmy, H., and Haikal, M. 2003. Fibrous LCM Sweeps Enhance HoleCleaning and ROP on Extended Reach Well in Abu Dhabi. Paper SPE 81419presented at the Middle East Oil Show, Bahrain, 9-12 June. doi:10.2118/81419-MS.
Clark, R.K. and Bickham, K.L. 1994. A Mechanistic Model for CuttingsTransport. Paper SPE 28306 presented at the SPE Annual Technical Conferenceand Exhibition, New Orleans, 25-28 September. doi: 10.2118/28306-MS.
Hemphill, T. and Rojas, J.C. 2002. Drilling Fluid Sweeps: TheirEvaluation, Timing, and Applications. Paper SPE 77448 presented at the SPEAnnual Technical Conference and Exhibition, San Antonio, Texas, USA, 29September-2 October. doi: 10.2118/77448-MS.
Joung, C.G., Phan-Thien, N., and Fan, X.J. 2002. Viscosity of curvedfibers in suspension. Journal of Non-Newtonian Fluid Mechanics 102 (1): 1-17. doi:10.1016/S0377-0257(01)00163-X.
Marti, I., Höfler, O., Fischer, P., and Windhab, E.J. 2005. Rheology of concentratedsuspensions containing mixtures of spheres and fibres. RheologicalActa 44 (5): 502-512. doi:10.1007/s00397-005-0432-9.
Metzner, B. 1977. Polymersolution and fiber suspension rheology and their relationship to turbulent dragreduction. Physics of Fluids 20 (10): S145.doi:10.1063/1.861723.
Rajabian, M., Dubois, C., and Grmela, M. 2005. Suspensions of SemiflexibleFibers in Polymeric Fluids: Rheology and Thermodynamics. RheologicalActa 44 (5): 521-535. doi:10.1007/s00397-005-0434-7.
Robertson, N., Hancock,S., and Mota, L. 2005. Effective Torque Management of WytchFarm Extended-Reach Sidetrack Wells. Paper SPE 95430 presented at the SPEAnnual Technical Conference and Exhibition, Dallas, 9-12 October. doi:10.2118/95430-MS.
Sifferman, T.R. and Becker, T.E. 1992. Hole Cleaning in Full-Scale InclinedWellbores. SPE Drill Eng 7 (2): 115-120; Trans.,AIME, 293. SPE-20422-PA. doi: 10.2118/20422-PA.
Swerin, A. 1998. Rheological propertiesof cellulosic fibre suspensions flocculated by cationic polyacrylamides.Colloids and Surfaces A: Physicochemical and Engineering Aspects 133 (3): 279-294. doi:10.1016/S0927-7757(97)00212-4.
Valluri, S.G., Miska, S.Z., Ahmed, R., Yu, M., and Takach, N.E. 2006. Experimental Study of Effective HoleCleaning Using "Sweeps" in Horizontal Wellbores. Paper SPE 101220 presentedat the SPE Annual Technical Conference and Exhibition, San Antonio, Texas, USA,24-27 September. doi: 10.2118/101220-MS.
Vaseleski, R.C. and Metzner, A.B. 1974. Drag reduction in the turbulentflow of fiber suspensions. AIChE Journal 20 (2):301-306. doi:10.1002/aic.690200214.
Webster, A.G. 1919. On theAngle of Repose of Wet Sand. Proceedings Of the National Academy ofSciences 5 (7): 263-265. doi:10.1073/pnas.5.7.263.
Xu, H. and Aidun, C.K. 2005. Characteristicsof fiber suspension flow in a rectangular channel. International Journalof Multiphase Flow 31 (3): 318-336.doi:10.1016/j.ijmultiphaseflow.2004.12.003.
Zhenjiang, Y., Jianzhong, L., and Zhaosheng, Y. 2004. Hydrodynamicinstability of fiber suspensions in channel flows. Fluid DynamicsResearch 34 (4): 251-271.doi:10.1016/j.fluiddyn.2004.01.002.