Formate Drilling and Completion Fluids: Evaluation of Potential Well-Productivity Impact, Valemon
- Niall Fleming (Statoil) | Lars G. Moland (Statoil) | Grete Svanes (Statoil) | Russell Watson (Schlumberger) | Justin Green (Corex) | Ian Patey (Corex) | Michael Byrne (LR Senergy) | Siv Howard (Cabot)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- February 2016
- Document Type
- Journal Paper
- 22 - 28
- 2016.Society of Petroleum Engineers
- formation damage, cesium formate, Valemon
- 1 in the last 30 days
- 421 since 2007
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Valemon, operated by Statoil, is a high-pressure/high-temperature (HP/HT) gas/condensate field on the Norwegian Continental Shelf. Production started at the beginning of 2015 from a development consisting initially of cased-and-perforated wells. However, during early field development, the original concept was for a standalone-screen (SAS) lower completion. A potassium/cesium (K/Cs) formate water-based system with a density of 2.02 specific gravity (sg) was considered as a candidate drilling-and-completion fluid for the wells completed with screens, one of which could potentially be suspended in formate brine for up to 10 months before the arrival of the platform and before cleanup and the onset of production. An unknown was the possibility for any near-wellbore interaction with these fluids during extended contact and the possible detrimental impact on productivity. Computational-fluid-dynamics (CFD) modeling was performed to determine the length of time formate would be in contact with the near wellbore, demonstrating that, especially for the lower-permeability intervals, a contact time of approximately 45 days was a possibility. In light of this, a sequence of corefloods was performed that involved extended soaks in formate along with pre- and post-test analyses to identify potential damage mechanisms. Those identified included kaolinite dissolution, precipitation of barium and cesium silicate, and swelling of kaolinite because of the incorporation of potassium and cesium into the kaolinite lattice. To confirm the findings from the CFD and coreflood modeling, a field review was made of Statoil's experiences with suspending wells for extended time in formate before cleanup and production. The field review demonstrated positive experiences in the use of formates in suspended wells with respect to productivity. Lower than expected productivity was experienced for some wells, but this could not be related conclusively to the use of formates. This paper provides an overview of lessons learned from coreflooding, CFD modeling, and actual field data on wells suspended in formate before cleanup and production.
|File Size||1 MB||Number of Pages||7|
Berg, P. C., Pedersen, E. S., Lauritsen, Å. et al. 2009. Drilling and Completing High-Angle Wells in High-Density, Cesium Formate Brine—The Kvitebjørn Experience, 2004–2006. SPE Drill & Compl 24 (1): 15–24. SPE-105733-PA. http://dx.doi.org/10.2118/105733-PA.
Bungert, D., Maikranz, S., Sundermann, R. et al. 2000. The Evolution and Application of Formate Brines in High-Temperature/High-Pressure Operations. Presented at the IADC/SPE Drilling Conference, New Orleans, Louisana, 23–25 February. SPE-59191-MS. http://dx.doi.org/10.2118/59191-MS.
Byrne, M. and Patey, I. 2003. Formation Damage Laboratory Testing - A Discussion of Key Parameters, Pitfalls and Potential. Presented at the SPE European Formation Damage Conference, The Hague, The Netherlands, 13–14 May. SPE-82250-MS. http://dx.doi.org/10.2118/82250-MS.
Denniss, E., Patey, I. T. M., and Byrne, M. T. 2007. Cryogenic Scanning Electron Microscope Analysis: An Aid to Formation Damage Assessment. Presented at the SPE European Formation Damage Conference, Scheveningen, The Netherlands, 30 May–1 June. SPE-107560-MS. http://dx.doi.org/10.2118/107560-MS.
Downs, J. 2009. Observations on Gas Permeability Measurements Under HPHT Conditions in Core Materials Exposed To Cesium Formate Brine. Presented at the SPE European Formation Damage Conference, Scheveningen, The Netherlands, 27–29 May. SPE-121649-MS. http://dx.doi.org/10.2118/121649-MS.
Downs, J. 2011. Life Without Barite: Ten Years of Drilling Deep HPHT Gas Wells With Cesium Formate Brine. Presented at the SPE/IADC Middle East Drilling Technology Conference and Exhibition, Muscat, Oman, 24–26 October. SPE-145562-MS. http://dx.doi.org/10.2118/145562-MS.
Green, J., Cameron, R., Patey, I. et al. 2013. Use of Micro-CT Scanning Visualisations to Improve Interpretation of Formation Damage Laboratory Tests Including a Case Study From the South Morecambe Field. Presented at the SPE European Formation Damage Conference and Exhibition, Noordwijk, The Netherlands, 5–7 June. SPE-165110-MS. http://dx.doi.org/10.2118/165110-MS.
Hayatdavoudi, A. and Ghalambor, A. 1996. Controlling Formation Damage Caused by Kaolinite Clay Minerals: Part I. Presented at the SPE Formation Damage Control Symposium, Lafayette, Louisiana, 14–15 February. SPE-31118-MS. http://dx.doi.org/10.2118/31118-MS.
Hayatdavoudi, A. and Ghalambor, A. 1998. Controlling Formation Damage Caused by Kaolinite Clay Minerals: Part II. Presented at the SPE Formation Damage Control Conference, Lafayette, Louisiana, 18–19 February. SPE-39464-MS. http://dx.doi.org/10.2118/39464-MS.
Howard, S. K. 1995. Formate Brines for Drilling and Completion: State of the Art. Presented at the SPE Annual Technical Conference and Exhibition, Dallas, Texas, 22–25 October. SPE-30498-MS. http://dx.doi.org/10.2118/30498-MS.
Huertas, F. J., Chou, L., and Wollast, R. 1999. Mechanism of Kaolinite Dissolution at Room Temperature and Pressure Part II: Kinetic Study. Geochimica et Cosmochimica Acta 63 (19–20): 3261–3275. http://dx.doi.org/10.1016/S0016-7037(99)00249-5.
Hurst, A. R. 1980. Occurrence of Corroded Authigenic Kaolinite in a Diagenetically Modified Sandstone. Clay and Clay Minerals 28 (5): 393–396. http://dx.doi.org/10.1346/CCMN.1980.0280511.
Nottveit, A. 2003. Tune Case: Experience from Drilling and Completion Using Formate-Based Fluids. Presented at the IQPC Drilling Completion Fluids Conference, Aberdeen, 23–24 June.
Olsvik, G., Howard, S., and Downs, J. 2013. The Long-Term Production Performance of Deep HPHT Gas Condensate Fields Developed Using Formate Brines. Presented at the SPE European Formation Damage Conference and Exhibition, Noordwijk, The Netherlands, 5–7 June. SPE-165151-MS. http://dx.doi.org/10.2118/165151-MS.
Oswald, R. J., Knox, D. A., and Monem, M. R. 2006. Taking Nondamaging Fluids to New Extremes: Formate-Based Drilling Fluids for High-Temperature Reservoirs in Pakistan. Presented at the SPE International Symposium and Exhibition on Formation Damage Control, Lafayette, Louisiana, 15–17 February. SPE-98391-MS. http://dx.doi.org/10.2118/98391-MS.
Qureshi, M. A., Ali, M., and Preining, P. 2008. Pushing the Limits: Improving Drilling Performance of High Temperature Wells in Thar Desert in Sindh, Pakistan. Presented at the SPE Asia Pacific Oil and Gas Conference and Exhibition, Perth, Australia, 20–22 October. SPE-115319-MS. http://dx.doi.org/10.2118/115319-MS.
Saasen, A., Jordal, O. H., Burkhead, D. et al. 2002. Drilling HT/HP Wells Using a Cesium Formate Based Drilling Fluid. Presented at the IADC/SPE Drilling Conference, Dallas, Texas, 26–28 February. SPE-74541-MS. http://dx.doi.org/10.2118/74541-MS.
Simpson, M. A., Al-Reda, S., Al-Khamees, S. et al. 2005. Overbalanced Drilling of Extended Horizontal Sections With Potassium Formate Brines. Presented at the SPE Middle East Oil and Gas Show and Conference, Kingdom of Bahrain, 12–15 March. SPE-92407-MS. http://dx.doi.org/10.2118/92407-MS.