Sand Cleanouts With Coiled Tubing: Choice of Process, Tools and Fluids
- Jeff Li (BJ Services Company) | John Misselbrook (BJ Services Company) | Manfend Sach (BJ Services Company)
- Document ID
- Society of Petroleum Engineers
- Journal of Canadian Petroleum Technology
- Publication Date
- August 2010
- Document Type
- Journal Paper
- 69 - 82
- 2010. Society of Petroleum Engineers
- 5.6.4 Drillstem/Well Testing, 1.6 Drilling Operations, 3 Production and Well Operations, 2.4.3 Sand/Solids Control, 3.1.3 Hydraulic and Jet Pumps
- coiled tubing
- 7 in the last 30 days
- 1,239 since 2007
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Cleaning fill from wellbores is the most common coiled tubing (CT) application. The process is a function of multiple variables including fluid properties, flow velocities, wellbore geometry and deviation, pipe eccentricity, particle properties, fill penetration rate and wiper trip speed. Removing fill from wells with low bottom hole pressures (BHP) can be challenging especially if wells are completed with smaller diameter production tubulars which significantly reduce circulation flow cross-section and choke flow(1). Such challenges are further compounded by high deviation or horizontal well trajectories especially in large diameter wellbores.
A variety of cleanout methods have been developed in the past, often incorporating high circulation rates, special fluids, wiper trips, or reverse circulation to remove solids. Many of these conventional sand cleanout methods often apply excess hydrostatic pressure on the formation, resulting in lost circulation in pressure depleted reservoirs. The conventional solution to overcome excess hydrostatic pressure has been to include nitrogen to reduce fluid density and thus lessen the hydrostatic head; however, sand vacuuming technology using a concentric coiled tubing (CCT) with a downhole jet pump is an alternative technique for removing fill without placing a hydrostatic load on the reservoir.
This paper reviews the individual sand cleanout systems and discusses the advantages and limitations related to each method. In recent years, cleaning sand using the wiper trip method has become the preferred technique. However, an appropriate pump rate and reservoir pressure are needed to maintain a proper return flow rate to carry the sands to the surface. For pressure-depleted reservoirs completed with horizontal wells, a sand vacuuming system can be used to efficiently remove the debris without circulating nitrogen and without high pump rates. When the fill cannot be removed from large-diameter deviated wellbores using conventional low-cost cleanout fluids, then fluids with high solids suspension capability (under shear conditions) in conjunction with wiper tripping may be an economical option. The main application for the reverse circulation technique is cleaning sand from large diameter wellbores when the necessary pump rates for conventional "forward" circulation are not achievable. A venturi junk bailer is often used to retrieve larger or heavier material which cannot be circulated out by traditional methods. Field cases are provided, demonstrating how to select the proper cleaning method and how to efficiently remove sand from a wellbore based on both operational and logistical conditions.
|File Size||1 MB||Number of Pages||14|
1. Engel, S.P. and Rae, P. 2002. New Methods for Sand Cleanout inDeviated Wellbores Using Small Diameter Coiled Tubing. Paper SPE 77204presented at the IADC/SPE Asia Pacific Drilling Technology Conference, Jakarta,8-11 September. doi: 10.2118/77204-MS.
2. Li, J., Luft, H.B., Wilde, G., Alingig, G., and Jumawid, F. 2008. Cleanouts with Coiled Tubing in LowBottom Hole Pressure Wellbores. Paper SPE 113841 presented at the SPE/ICoTACoiled Tubing and Well Intervention Conference and Exhibition, The Woodlands,Texas, USA, 1-2 April. doi: 10.2118/113841-MS.
3. Li, J., Crabtree, A., Kutchel, M, Diaz, J., Reyes, W., Dugarte, R., andPeña, L. 2008. Sand/WellVacuuming Technology with Concentric Coiled Tubing: Best Practices and LessonsLearned from Over 600 Operations. Paper SPE 115303 presented at the SPEAsia Pacific Oil and Gas Conference and Exhibition, Perth, Australia, 20-22October. doi: 10.2118/115303-MS.
4. Bartholomew, P., Portman, L., Frost, R., Nunn, P., Vause, P., Edmondson,D., Andrich, L., and LaGrange, T. 2006. Near a Kilometer of PerforatingGuns, in a 7½-km, Extended Reach Well—Coiled Tubing Shows its Mettle in NewZealand. Paper SPE 101065 presented at the SPE Asia Pacific Oil and GasConference and Exhibition, Adelaide, Australia, 11-13 September. doi:10.2118/101065-MS.
5. Li, J., Aitken, B., Jumawid, F., and Alingig, G. 2010. Cleaning Horizontal WellboresEfficiently with Reverse Circulation Combining with Wiper Trip for CoiledTubing Annulus Fracturing Application. Paper SPE 130638 presented at theSPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition, TheWoodlands, Texas, USA, 23-24 March. doi: 10.2118/130638-MS.
6. Sach, M. and Li, J. 2007. Repeatedly Increased Efficiency andSuccess Rate From a New Solids-Cleanout Process Using Coiled Tubing: A Reviewof Recent Achievements From Over 100 Operations. Paper SPE 106857 presentedat the SPE/ICoTA Coiled Tubing and Well Intervention Conference and Exhibition,The Woodlands, Texas, USA, 20-21 March. doi: 10.2118/106857-MS.
7. Li, J. and Walker, S. 2001. Sensitivity Analysis of Hole CleaningParameters in Directional Wells. SPE J. 6 (4): 356-363.PA-74710-PA doi: 10.2118/74710-PA.
8. Walker, S. and Li, J. 2000. Effects of Particle Size, FluidRheology, and Pipe Eccentricity on Cuttings Transport. Paper SPE 60755presented at the SPE/ICoTA Coiled Tubing Roundtable, Houston, Texas, USA, 5-6April. doi: 10.2118/60755-MS.
9. Walker, S. and Li, J. 2001. Coiled-Tubing Wiper Trip HoleCleaning in Highly Deviated Wellbores. Paper SPE 68435 presented at theSPE/ICoTA Coiled Tubing Roundtable, Houston, Texas, USA, 7-8 March. doi:10.2118/68435-MS.
10. Li, J., Walker, S., and Aitken, B. 2002. How to Efficiently Remove Sand FromDeviated Wellbores With a Solids Transport Simulator and a Coiled TubingCleanout Tool. Paper SPE 77527 presented at the SPE Annual TechnicalConference and Exhibition, San Antonio, Texas, USA, 29 September-2 October.doi: 10.2118/77527-MS.
11. Li, J., Wilde, G., and Crabtree, A. 2005. Do Complex Super-Gel Liquids PerformBetter Than Simple Linear Liquids In Hole Cleaning With Coiled Tubing?Paper SPE 94185 presented at the SPE/ICoTA Coiled Tubing Conference andExhibition, TheWoodlands, Texas, USA, 12-13 April. doi: 10.2118/94185-MS.
12. Li, J. and Wilde, G. 2005. Effect of Particle Density and Sizeon Solids Transport and Hole Cleaning with Coiled Tubing. Paper SPE 94187presented at the SPE/ICoTA Coiled Tubing Conference and Exhibition, TheWoodlands, Texas, USA, 12-13 April. doi: 10.2118/94187-MS.
13. Walker, S.A., Li, J., and Wilde, G. 2006. Coiled Tubing WellboreCleanout. US Patent No. 6,982,008.
14. Ovesen, M., Sach, M., Laun, L., Gill, G.E., and Juel, H. 2003. Efficient Sand Cleanouts in LargerWellbores Using Coiled Tubing: A New Approach Making an Old Problem Simple.Paper SPE 81727 presented at the SPE/ICoTA Coiled Tubing Conference andExhibition, Houston, Texas, USA, 8-9 April. doi: 10.211881727-MS.
15. Hobbs, D. and Liles, C. 2002. Technique, nozzle enhance coiled tubingwiper-trip efficiency. Oil & Gas Journal 100 (13): 52-56.
16. Gilmore, T., Leonard, R., and Steinback, S. 2005. Software, Fluids and Downhole Toolsfor Successful Sand Cleanouts in Any Wellbore Geometry Using Small CoiledTubing. Paper SPE 97080 presented at the SPE Annual Technical Conferenceand Exhibition, Dallas, 9-12 October. doi: 10.2118/97080-MS.
17. Nasr-El-Din, H.A., Al-Anazi, M.A., Balto, A., Proctor, R., and Saleh,R.M. 2006. Challenging WellboreCleanouts with Coiled Tubing Made Easy with Computer Modeling Technology.Paper SPE 100129 presented at the SPE/ICoTA Coiled Tubing Conference andExhibition, The Woodlands, Texas, USA, 4-5 April. doi:10.2118/100129-MS.
18. Li, J., Bayfield, I., and Paton, G. 2006. Effective Heavy Post-FracturingProppant Cleanout With Coiled Tubing: Experimental Study and Field CasingHistory. Paper SPE 101235 presented at the SPE Annual Technical Conferenceand Exhibition, San Antonio, Texas, USA, 24-27 September. doi:10.2118/101235-MS.
19. Li, J. and Luft, B. 2006. Fills Cleanout with Coiled Tubing inthe Reverse Circulation Mode. Paper SPE 102661 presented at the IADC/SPEAsia Pacific Drilling Technology Conference and Exhibition, Bangkok, Thailand,13-15 November. doi: 10.2118/102661-MS.
20. Crabtree, A.R., Li. J., and Luft, B. 2007. Reverse Circulation CleanoutsWith Coiled Tubing. Paper OMC 094 presented at the Offshore MediterraneanConference and Exhibition, Ravenna, Italy, 28-30 March.
21. Michel, C., Stephens, R., Smith, D., Crow, W., and King, G.E. 2004. Reverse Circulation with CoiledTubing - Results of 1600+ Jobs. Paper SPE 89505 presented at the SPE/ICoTACoiled Tubing Conference and Exhibition, Houston, 23-24 March. doi:10.2118/89505-MS.
22. Kumar, S.P., AI-Amri, B., Kouli, P., Gisbergen, S.V., Shidi, S.,Ferdiansyah, E., and Mowat, P. 2005. Coiled Tubing Reverse Circulation-AnEfficient Method of Cleaning Horizontal Wells in a Mature Pressure DepletedField. Paper SPE 92804 presented at the SPE Asia Pacific Oil and GasConference and Exhibition, Jakarta, 5-7 April. doi: 10.2118/92804-MS.
23. Falk, K. and Fraser, B. 1995. Sand Cleanout Technology for HorizontalWells. Paper SPE 9597 presented at the SPE Annual Technical Meeting,Calgary, 7-9 June. doi: 10.2118/95-57.
24. Heikkinen, B.K., Kuchel, M.P., Stang, Q.S., Misselbrook, J.G., Sudol,T.A., and Lillico, D.A. 1998. Drilling Damage Removal Using Multipoint Drawdownalong the Horizontal Wellbore. Paper SPE 46011prepared for presentation at theSPE/ICoTA Coiled Tubing Roundtable, Houston, 15-16 April.
25. Clancy, T.F., Falk, K.L., and Duque, L. 2000. Concentric Coiled Tubing WellVacuuming Technology for Complex Horizontal Wells in Easter Venezuela.Paper SPE 60696 presented at the SPE/ICoTA Coiled Tubing Roundtable, Houston,5-6 April. doi: 10.2118/60696-MS.
26. Figueroa, J., Hibbeler, J., Duque, L., and Perdomo, L. 2001. Skin Damage Removal Using Coiled-Tubing Vacuum: A Case Study in Venezuela's Orinoco Belt. Paper SPE 69532presented at the SPE Latin American and Caribbean Petroleum EngineeringConference, Buenos Aires, 25-28 March. doi: 10.2118/69532-MS.
27. Ali, S. A., Hibbeler, J., and Di Lullo, G. 2002. Coiled Tubing VacuumRemove Drilling Induced Damage. Oil & Gas Journal 100 (13):43-47.
28. Hibbeler, J., Duque, L., Castro, L., Gonzalez, A., and Romero, J. 2002.Underbalanced Coiled-TubingTechnique Leads to Improved Productivity in Slotted Liner Completions.Paper SPE 74846 presented at the SPE/ICoTA Coiled Tubing Conference andExhibition, Houston, 9-10 April. doi: 10.2118/74846-MS.
29. Selle, C., Ansari, A., and Portman, L. 2002. Removing Mud Damage fromDepleted Horizontal Wells Using Jet Pumps and Concentric Coiled Tubing. Oralpresentation SPE 77210 given at the IADC/SPE Asia Pacific Drilling TechnologyConference and Exhibition, Jakarta, 9-11 September.
30. Benzaquen, I., Romero,J., Zambrano, J., Henao, P., and Ortiz, A. 2006.Cleaning Effectivity ofConcentric Coiled Tubing in Horizontal Wells, Cerro Negro Area, Carabobo Field,Venezuela. Paper SPE 102436 presented at the SPE International Oil and GasConference and Exhibition, Beijing, 5-7 December. doi: 10.2118/102436-MS.
31. Putra, R.A., Azkawi, A., Bharti, S., and Oyemade, S. 2007. Well Cleanup Issues in Field withSand Coproduction Philosophy in Oman. Paper SPE 107677 presented at the SPEEuropean Formation Damage Conference, Scheveningen, The Netherlands, 30May-1June. doi: 10.2118/107677-MS.
32. Portman, L. 2003. Reducingthe Cost of Coiled Tubing Cleanouts by Conducting Them Without Nitrogen.Paper SPE 81744 presented at the SPE/ICoTA Coiled Tubing Conference andExhibition, Houston, 8-9 April. doi: 10.2118/81744-MS.
33. Kuchel, M., Clark, J., and Marques, D. 2002. Horizontal Well Cleaning andEvaluation Using Concentric Coiled Tubing: A 3 Well Case Study fromAustralia. Paper SPE 74820 presented at the SPE/ICoTA Coiled TubingConference and Exhibition, Houston, 9-10 April. doi: 10.2118/74820-MS.
34. Rafferty, P., Ennis, J., Skufca, J., and Craig, S. 2007. Enhanced Solids Removal TechniquesFrom Ultra Low Pressure Wells Using Concentric Coiled Tubing VacuumTechnology. Paper SPE 107010 presented at the SPE/ICoTA Coiled Tubing andWell Intervention Conference and Exhibition, The Woodlands, Texas, USA, 20-21April. doi: 10.2118/107010-MS.
35. Kutch, M. 2007. Evaluation of the Inflow Profiling of the Wellbore withthe CCT Vacuuming. Paper SPE 110161 presented at Asia Pacific Oil and GasConference and Exhibition, Jakarta, 30 October-1 November.
36. Skufca, J. and Li, J. 2009. Cleaning Large-Diameter Proppant inLow-Bottomhole Pressure, Extended-Reach Wells with Concentric Coiled TubingVacuuming Technology. Paper SPE 121498 presented at the SPE/ICoTA CoiledTubing and Well Intervention Conference and Exhibition, The Woodlands, Texas,USA, 31 March-1 April. doi: 10.2118/121498-MS.
37. Gunther, O., Higgins, G., Li, J., and Lambert, M. 2009. Ultra-Low Pressure Wellbore CleanoutsUsing Micro-Vacuuming Technology and Concentric Coiled Tubing. Paper SPE13168 presented at the International Petroleum Technology Conference, Doha, 7-9December. doi: 10.2523/13168-MS.
38. Haughton, D.B. and Connell, P. 2006. Reliable and Effective DownholeCleaning System for Debris and Junk Removal. Paper SPE 101727 presented atthe SPE Asia Pacific Oil and Gas Conference and Exhibition, Adelaide,Australia, 11-13 September. doi: 10.2118/101727-MS.
39. Grassick, R. 2007. An Electric Line Solution for Sand and DebrisRemoval. Paper presented at the ICoTA European Chapter Working Lunch.
40. Hansen, B. 2004. New Wireline Tractor Tools Reduce Light WellIntervention Costs. Oil & Gas Review: 1-6.
41. Chen, Z., Ahmed, R.M., Miska, S.Z., Takach, N.E., Yu, M., Pickell, M.B.,and Hallman, J. 2006. ExperimentalStudy on Cuttings Transport with Foam under Simulated Horizontal DownholeConditions. Paper SPE 99201 presented at the IADC/SPE Drilling Conference,Miami, Florida, USA, 21-23 February. doi: 10.2118/99201-MS.