Improved Scale Squeeze Placement in Horizontal Wells With Pressure Variations Along the Well Using Non-Newtonian Fluids With Inflow Control Devices
- Vincent Droppert (Wintershall Dea Norge AS) | Stephan Hatscher (Wintershall Dea Norge AS) | Lesmana Djayapertapa (Lloyd's Register) | Michael Byrne (Lloyd's Register)
- Document ID
- Society of Petroleum Engineers
- SPE International Oilfield Scale Conference and Exhibition, 24-25 June, Virtual
- Publication Date
- Document Type
- Conference Paper
- 2020. Society of Petroleum Engineers
- 2 Well completion, 2.3 Completion Monitoring Systems/Intelligent Wells, 5.2 Reservoir Fluid Dynamics, 5.2 Reservoir Fluid Dynamics, 2.1.3 Completion Equipment, 1.6 Drilling Operations, 4.3.4 Scale, 2.3.3 Inflow Control Equipment
- simulation CFD scale squeeze placement ICD, subsea horizontal oil wells
- 2 in the last 30 days
- 95 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 5.00|
|SPE Non-Member Price:||USD 28.00|
The Nova subsea oilfield development is located in the Norwegian sector of the Northern North Sea and will be developed with 3 oil-producer / water-injector pairs. Two of the production wells will be open hole horizontal wells of moderate length (400 – 1000 m) completed with sand screens equipped with ICDs (inflow control devices) to facilitate the best possible clean-up and to optimize inflow distribution.
The injection of filtered and treated seawater has been selected for reservoir pressure support. Despite the relatively low Barium content (<70 mg/L) in the formation water, sulphate scaling is expected to appear in the production wells once injection water breakthrough occurs. In order to maintain well productivity, periodic successfully placed scale squeezes are essential.
As the horizontal wells are completed across multiple reservoir segments in the same layer, uncertainties in fault transmissibility and water injector connectivity may result in variation of pressure along the well, thereby complicating squeeze placement. Traditionally, variation in rate and fluid viscosity have been applied to improve placement of scale inhibitor in the higher-pressure layers connected to the water injector. Chemical vendor simulations indicated that for a pressure variation below 5 bar adequate placement could be achieved with non-Newtonian fluids, however for higher differential pressures significant portions of the well would go untreated.
The Nova sand screens are equipped with inflow control devices designed to allow the best possible clean-up after drilling and optimize inflow during production by distribution of drawdown and limiting of annular flow. The idea of using the same principles for scale squeeze was difficult to prove due to limitations in vendor placement software and other industry standard modelling packages not being able to model the combination of ICDs and non-Newtonian fluids.
Computational Fluid Dynamics (CFD) on the other hand can simulate various factors that could influence the placement of scale inhibitors along the well length. Factors such as Newtonian versus non-Newtonian scale inhibitors, different reservoir pressure profile, ICD nozzle sizes and different well completions. This is all possible because CFD is largely based on physics and rigorous geometry, which is a significant step forward compared to the industry-standard scale squeeze placement software (Byrne 2010, 2011, 2014).
Application of a computational fluid dynamics well model has provided confidence that the combination of non-Newtonian fluids and production ICDs would allow scale squeeze placement along the whole reservoir interval despite significant pressure variations across it.
|File Size||1 MB||Number of Pages||17|
Byrne, M. T., Jimenez, M. A., Rojas, E. A., & Chavez, J. C. (2010, January 1). Modeling Well Inflow Potential in Three Dimensions Using Computational Fluid Dynamics. Society of Petroleum Engineers. doi:10.2118/128082-MS
Byrne, M., Djayapertapa, L., Watson, K., & Goodin, B. (2014, February 26). Complex Completion Design and Inflow Prediction Enabled by Detailed Numerical Well Modeling. Society of Petroleum Engineers. doi:10.2118/168149-MS
Byrne, M. T., Jimenez, M. A., & Salimi, S. (2011, January 1). Modelling the Near Wellbore and Formation Damage - a Comprehensive Review of Current and Future Options. Society of Petroleum Engineers. doi:10.2118/144096-MS
Feasey, N. D., Jordan, M. M., Mackay, E. J., & Collins, I. R. (2004, January 1). The Challenge that Completion Types Present to Scale inhibitor squeeze Chemical Placement: A Novel Solution using a Self-Diverting Scale Inhibitor Squeeze Process. Society of Petroleum Engineers. doi:10.2118/86478-MS
James, J. S., Frigo, D. M., Heath, S. M., Graham, G. M., & Townsend, M. M. (2005, January 1). Application of a Fully Viscosified Scale Squeeze for Improved Placement in Horizontal Wells. Society of Petroleum Engineers. doi:10.2118/94593-MS
Jordan, M. M., Edgerton, M., & Mackay, E. J. (1999, January 1). Application of Computer Simulation Techniques and Solid Divertor to Improve Inhibitor Squeeze Treatments in Horizontal Wells. Society of Petroleum Engineers. doi:10.2118/50713-MS
Mackay, E. J., Matharu, A. P., Sorbie, K. S., & Jordan, M. M. (2000, May 1). Modeling Scale-Inhibitor Treatments in Horizontal Wells: Application to the Alba Field. Society of Petroleum Engineers. doi:10.2118/63013-PA
McCartney, R. A., Hatscher, S. T., & Droppert, V. S. (2018, June 20). Correcting for Mud Filtrate Contamination of Formation Water Samples for Scale Management Planning: A Case Study from the Nova Field, Norwegian North Sea. Society of Petroleum Engineers. doi:10.2118/190746-MS
Menzies, N. A., Mackay, E. J., & Sorbie, K. S. (1999, January 1). Modelling of Gel Diverter Placement in Horizontal Wells. Society of Petroleum Engineers. doi:10.2118/56742-MS
Selle, O. M., Springer, M., Auflem, I. H., Chen, P., Matheson, R., Mebratu, A. A., & Glasbergen, G. (2008, January 1). Gelled Scale Inhibitor Treatment for Improved Placement in Long Horizontal Wells at Norne and Heidrun Fields. Society of Petroleum Engineers. doi:10.2118/112464-MS
Selle, O. M., Nygard, O.-K., Storas, E., Moen, A., Matheson, R., Juliussen, B., … Melien, I. (2012, January 1). Foamed Scale Inhibitor and Scale Dissolver Treatments for Improved Placement in a Subsea Norne Well. Society of Petroleum Engineers. doi:10.2118/155407-MS
Stalker, R., Graham, G. M., Oliphant, D., & Smillie, M. (2004, January 1). Potential Application of Viscosified Treatments For Improved Bullhead Scale Inhibitor Placement in Long Horizontal Wells - A Theoretical and Laboratory Examination. Society of Petroleum Engineers. doi:10.2118/87439-MS