Drilling and Completing High-Angle Wells in High-Density, Cesium Formate Brine--The Kvitebjørn Experience, 2004-2006
- Per Cato Berg (StatoilHydro) | Erik Sandtorv Pedersen (StatoilHydro) | Åshild Lauritsen (Statoil ASA) | Nader Behjat (Statoil Norway) | Siri Hagerup-Jenssen (StatoilHydro) | Siv Killie Howard (Cabot Specialty Fluids) | Gunnar Olsvik (Intl. Drilling Fluids Inc.) | John D. Downs (Cabot Specialty Fluids) | Jim Turner (Cabot Specialty Fluids) | Michael J. Harris (Cabot Specialty Fluids)
- Document ID
- Society of Petroleum Engineers
- SPE Drilling & Completion
- Publication Date
- March 2009
- Document Type
- Journal Paper
- 15 - 24
- 2009. Society of Petroleum Engineers
- 5.4.10 Microbial Methods, 5.6.1 Open hole/cased hole log analysis, 5.2 Reservoir Fluid Dynamics, 1.10 Drilling Equipment, 2.7.1 Completion Fluids, 1.11.2 Drilling Fluid Selection and Formulation (Chemistry, Properties), 5.8.9 HP/HT reservoirs, 1.11 Drilling Fluids and Materials, 2.2.2 Perforating, 2 Well Completion, 1.14 Casing and Cementing, 1.6.9 Coring, Fishing, 6.5.4 Naturally Occurring Radioactive Materials, 1.8 Formation Damage, 4.6 Natural Gas, 1.6 Drilling Operations, 2.2.3 Fluid Loss Control, 2.4.3 Sand/Solids Control, 3 Production and Well Operations, 4.2.3 Materials and Corrosion, 1.12.2 Logging While Drilling, 1.7.5 Well Control
- 7 in the last 30 days
- 1,298 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 12.00|
|SPE Non-Member Price:||USD 35.00|
Drilling and completion fluids based on cesium formate brines were selected by Statoil for use in the development of the high-pressure/high-temperature (HP/HT) Kvitebjørn field. CsFo brine was selected primarily to minimize well-control problems and maximize well productivity. These important benefits had been recognized by Statoil in previous HP/HT drilling and completion operations over the past 5 years. The use of the same fluid system for both drilling and completion gives the additional benefits of simplified operations, reduced waste, and elimination of fluid-incompatibility problems.
The challenge on the Kvitebjørn field was to drill long, deviated well paths through significant sequences of shales into reservoirs with pressures as great as 81 MPa (11,700 psi) and temperatures up to 155°C (311°F). So far, the CsFo brine has enabled the successful drilling and completion of seven high-angle, HP/HT production wells on Kvitebjørn, two completed with a cemented/perforated liner and five with sand screens.
Additionally, an extended-reach exploration well was drilled from the Kvitebjørn platform to the Valemon structure. The 705-m (2,313-ft) -long reservoir section of this 7380-m (24,213-ft) -long well with an inclination of 69° was drilled successfully with the same CsFo fluid system.
In all these wells, the CsFo-brine system once again demonstrated clear performance benefits such as very low equivalent circulating densities (ECDs), moderate-to-high rates of penetration (ROPs), good hole cleaning, and excellent wellbore stability while logging. Quick, trouble-free, safe, and robust completion operations were also accomplished, and the wells that have been put on production show high production rates with low skin.
Full openhole formation evaluation of the Kvitebjørn reservoir has been carried out successfully with logging-while-drilling (LWD) tools. The evaluation has been aided by the development of a novel logging-interpretation solution for a LWD density tool, in which the extremely high photoelectric effect of cesium-rich filtrate plays a vital role.
CsFo brine has helped Statoil to achieve a record of zero well-control incidents in all 15 HP/HT-drilling operations and 20 HP/HT-completion operations in the Kvitebjørn, Kristin, and Huldra fields over a period of 5 years.
|File Size||1 MB||Number of Pages||10|
Berg, P.C., Pedersen, E.S., Lauritsen, ?., Behjat, N., Hagerup-Jenssen, S.,Howard, S., Olsvik, G., Downs, J.D., Harris, M., and Turner, J. 2007. Drilling, Completion, and OpenholeFormation Evaluation of High-Angle HPHT Wells in High-Density Cesium FormateBrine: The Kvitebjørn Experience, 2004-2006. Paper SPE 105733 presented atthe SPE/IADC Drilling Conference, 20-22 February. DOI: 10.2118/105733-MS.
Chenevert, M.E. and Pernot, V. 1998. Control of Swelling Pressures UsingInhibitive Water-Base Muds. Paper SPE 49263 prepared for presentation atthe SPE Annual Technical Conference and Exhibition, New Orleans, 27-30September. DOI: 10.2118/49263-MS.
Downs, J.D. 1992. FormateBrines: New Solutions to Deep Slim-Hole Drilling Fluid Design Problems.Paper SPE 24973 presented at the European Petroleum Conference, Cannes, France,16-18 November. DOI: 10.2118/24973-MS.
Downs, J.D., Blaszczynski, M., Turner, J., and Harris, M. 2006. Drilling and Completing DifficultHP/HT Wells With the Aid of Cesium Formate Brine--A Performance Review.Paper SPE 99068 presented at the IADC/SPE Drilling Conference, Miami, Florida,USA, 21-23 February. DOI: 10.2118/99068-MS.
Downs, J.D., Howard, S.K., and Carnegie, A. 2005. Improving Hydrocarbon ProductionRates Through the Use of Formate Fluids--A Review. Paper SPE 97694presented at the SPE International Improved Oil Recovery Conference in AsiaPacific, Kuala Lumpur, 5-6 December. DOI: 10.2118/97694-MS.
Gilbert, Y.M., Wemyss, P., Gaches, P., Smith, D., and Pipe, R. 2003. Formatebrines environmental assessment. Metoc Report No. 1147, Hydro Formate ASA/Metocplc, Hants, UK (April 2003).
Hagerup-Jenssen, S. 2004. Hydraulic simulations for drilling depletedreservoirs on Kvitebjørn. MS thesis, Stavanger University College, Stavanger,Norway.
Hallman, J., Mackey, R., and Schwartz, K. 2002. Enhanced Shale StabilizationWith Very Low Concentration Potassium Formate/Polymer Additives. Oralpresentation SPE 73731 given at the International Symposium and Exhibition onFormation Damage Control, Lafayette, Louisiana, USA, 20-21 February.
Hansen, S.A., Breivik, D.H., Gjønnes, M., Svanes, K., Vujovic, M., Svela,P.E., and Sørheim, O.I. 2006. Drilling Fluids in an HP/HTReservoir: Experiences With Three Different Systems on the Kristin FieldDevelopment. Paper SPE 103336 presented at the SPE Annual TechnicalConference and Exhibition, San Antonio, Texas, USA, 24-27 September. DOI:10.2118/103336-MS.
Howard, S. 2006. Formate brines--Compatibility with metals. In FormateTechnical Manual, Part B: Compatibilities and Interactions, Section B6, http://www.formatebrines.com/Portals/2/Techmanual/Compatibility_with_metals.pdf.
Howard, S.K. 1995. FormateBrines for Drilling and Completion: State of the Art. Paper SPE 30498presented at the SPE Annual Technical Conference and Exhibition, Dallas, 22-25October. DOI: 10.2118/30498-MS.
Marshall, D.S., Gray, R., and Byrne, M. 1997. Development of a Recommended Practicefor Formation Damage Testing. Paper SPE 38154 presented at the SPE EuropeanFormation Damage Conference, The Hague, 2-3 June. DOI: 10.2118/38154-MS.
Marshall, D.S., Gray, R., and Byrne, M. 1999. Return Permeability: A DetailedComparative Study. Paper SPE 54763 presented at the SPE European FormationDamage Conference, The Hague, 31 May-1 June. DOI: 10.2118/54763-MS.
Pedersen, B.K., Pedersen, E.S., Morriss, S., Constable, M.V., Vissapragada,B., Sibbit, A., Stoller, C. et al. 2006. Understanding the Effects ofCesium/Potassium Formate Fluid on Well Log Response--A Case Study of theKristin and Kvitebjørn Fields, Offshore Norway. Paper SPE 103067 presentedat the SPE Annual Technical Conference and Exhibition, San Antonio, Texas, USA,24-27 September. DOI: 10.2118/103067-MS.
Rommetveit, R., Fjelde, K.K., Aas, B., Day, N.F., Low, E., and Schwartz,D.H. 2003. HPHT Well Control: An Integrated Approach. Paper OTC 15322 presentedat the Offshore Technology Conference, Houston, 5-8 May.
Saasen, A., Jordal, O.H., Burkhead, D., Berg, P.C., Løklingholm, G.,Pedersen, E.S., Turner, J., and Harris, M.J. 2002. Drilling HT/HP Wells Using a CesiumFormate Based Drilling Fluid. Paper SPE 74541 presented at the IADC/SPEDrilling Conference, Dallas, 26-28 February. DOI: 10.2118/74541-MS.
van Oort, E., Hale, A.H. Mody, F.K., and Roy, S. 1996. Transport in Shales and the Design ofImproved Water Based Shale Drilling Fluids. SPE Drill & Compl11 (3): 137-146. SPE-28309-PA. DOI: 10.2118/28309-PA.
Zuvo, M., Bjørnbom, E., Ellingsen, B., Buffagni, M., Kelley, A., andTrannum, H.C. 2005. High-Resolution Environmental SurveyAround an Exploration Well Drilled With Formate Brine in the Barents Sea,Norway. Paper SPE 94477 presented at the SPE/EPA/DOE Exploration andProduction Environmental Conference, Galveston, Texas, USA, 7-9 March. DOI:10.2118/94477-MS.