Combining Passive and Autonomous Inflow-Control Devices in a Trilateral Horizontal Well in the Alvheim Field
- Kåre Langaas (Aker BP ASA) | Emile J. W. G. Jeurissen (Aker BP ASA) | Hailu Kebede Abay (Resman A/S)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- December 2018
- Document Type
- Journal Paper
- 2018.Society of Petroleum Engineers
- trilateral horizontal well, tracers, lower completion design, autonomous inflow control devices, chemical production log
- 8 in the last 30 days
- 88 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 10.00|
|SPE Non-Member Price:||USD 30.00|
In this paper we describe the analysis, test, and design work to deliver an optimal lower completion for a trilateral well by integrating passive and autonomous inflow-control devices (ICDs) (AICDs) at the Alvheim Field offshore Norway.
In 2015, both passive ICDs and AICDs were tested in the laboratory with Alvheim fluids at reservoir conditions. The experimental flow testing demonstrated that the AICD chokes gas more efficiently than the passive ICD. The experimental results enabled correct modeling of AICDs in both the reservoir-simulation model and the simpler steady-state inflow model. The following lower-completion strategy was established for the new well: Where the well was close to the overlying gas cap, AICDs should be used, whereas passive ICDs with variable strength were to be used elsewhere to optimize the inflow.
During the drilling phase, the steady-state model was updated with the as-drilled information; the lower-completion design for each branch focused on obtaining what was estimated to be an optimal inflow depending on the oil volume per drainage area. A key uncertainty in the design work was whether shaly zones along the wellbore would creep/collapse with time and act effectively as packers.
The lower completion covered 7 km of reservoir penetration in the three branches, and 15 unique oil tracers were installed to evaluate the cleanup and the inflow profile along the well. The well started producing in May 2016 and a successful cleanup was confirmed by oil-tracer responses. In August 2016, a restart-tracer-sampling campaign was performed after a 12-day shut-in, and this formed the basis for a “chemical production log.”
The tracer-based inflow interpretation was compared quantitatively with the model-predicted inflow and qualitatively to the tracer responses seen during the cleanup. The comparison confirmed that the lower completion works as initially planned. The interpretation further indicated that the upper zone has a lower degree of pressure support than the lower zone, and that the larger shaly sections have creeped/collapsed and act as packers.
The well has exceeded predrill production expectations, with an average oil rate of 3375 std m3/d (21,240 STB/D) during the first production year. A large part of exceeding the predrill expectations is attributed to the lower-completion design, where the focus has been to optimize such that the whole well contributes, from the heel to all toes.
|File Size||2 MB||Number of Pages||15|
Abay, H. K., Gibbons, G., Nyhavn, F. et al. 2013. Monitoring Multilateral Flow and Completion Integrity With Permanent Intelligent Well Tracers. Presented at the SPE Annual Technical Conference and Exhibition, New Orleans, 30 September–2 October. SPE-166076-MS. https://doi.org/10.2118/166076-MS.
Halvorsen, M., Elseth, G., and Nævdal, O. M. 2012. Increased Oil Production at Troll by Autonomous Inflow Control With RCP Valves. Presented at the SPE Annual Technical Conference and Exhibition, San Antonio, Texas, 8–10 October. SPE-159634-MS. https://doi.org/10.2118/159634-MS.
Halvorsen, M., Madsen, M., Mo, M. V. et al. 2016. Enhanced Oil Recovery on Troll Field by Implementing Autonomous Inflow Control Device. Presented at the SPE Bergen One Day Seminar, Bergen, Norway, 20 April. SPE-180037-MS. https://doi.org/10.2118/180037-MS.
Hjellbakk, A., Bang, A, Kotwicki, A. et al. 2016. Stratigraphic Compartmentalization of the Alvheim Field. Presented at the 78th EAGE Conference and Exhibition, Vienna, Austria, 30 May–2 June. https://doi.org/10.3997/2214-4609.201600608.
Langaas, K. and Hjellbakk, A. 2015. Integrated Reservoir Modelling of the Alvheim Field. Presented at the SPE Bergen One Day Seminar, Bergen, Norway, 22 April. SPE-173875-MS. https://doi.org/10.2118/173875-MS.
Lauritzen, J. E. and Martiniussen, I. B. 2011. Single and Multi-Phase Flow Loop Testing Results for Industry Standard Inflow Control Devices. Presented at the SPE Offshore Europe Oil and Gas Conference and Exhibition, Aberdeen, 6–8 September. SPE-146347-MS. https://doi.org/10.2118/146347-MS.
Mathiesen, V., Werswick, B., Aakre, H. et al. 2011. Autonomous Valve, A Game Changer of Inflow Control in Horizontal Wells. Presented at Offshore Europe, Aberdeen, 6–8 September. SPE-145737-MS. https://doi.org/10.2118/145737-MS.
Mjaaland, S., Gudding, E., and Andresen, C. A. 2014. Wireless Inflow Monitoring in a Subsea Field Development: A Case Study From the Hyme Field, Offshore Mid-Norway. Presented at the SPE Annual Technical Conference and Exhibition, Amsterdam, 27–29 October. SPE-170619-MS. https://doi.org/10.2118/170619-MS.
Montes, A., Nyhavn, F., Oftedal, G. et al. 2013. Application of Inflow Well Tracers for Permanent Reservoir Monitoring in North Amethyst Subsea Tieback ICD Wells in Canada. Presented at the SPE Middle East Intelligent Energy Conference and Exhibition, Dubai, 28–30 October. SPE-167463-MS. https://doi.org/10.2118/167463-MS.