Design and Field Evaluation of Tubing-Deployed Passive Outflow-Control Devices in Steam-Assisted-Gravity-Drainage Injection Wells
- Max Medina (Statoil)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- November 2015
- Document Type
- Journal Paper
- 283 - 292
- 2015.Society of Petroleum Engineers
- steam injection, SAGD, ICD, OCD, flow control
- 2 in the last 30 days
- 420 since 2007
- Show more detail
- View rights & permissions
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The integration of horizontal wells and thermal-oil-recovery methods, such as steam-assisted gravity drainage (SAGD), has enabled the economic exploitation of extraheavy-oil resources, mainly in Canada. The use of passive outflow-control devices (OCDs) in SAGD wells adds steam-injection points along the horizontal wellbore, influencing steam placement and chamber growth, thus potentially reducing the steam/oil ratio, minimizing productivity uncertainty, and accelerating production.
To design OCD installations in SAGD, we need to address two main aspects. The first is the interface between horizontal-wellbore hydraulics and reservoir injectivity, which allows for the determination of the number and location of steam-injection points for improved performance. The other aspect is the design of the OCD itself, which involves selecting and configuring the device with a hydraulic performance that is fit for purpose. For this study, we will focus specifically on straight-orifice-choke passive OCDs.
This paper presents a comprehensive design methodology for tubing-deployed passive OCDs in SAGD. The completion design is carried out with a steady-state model of the injection well from a commercial thermal wellbore simulator.
The field-performance evaluation of tubing-deployed passive OCDs is critical for verifying the effectiveness of the design methodology and the hydraulic performance of the devices under real field conditions. The field evaluation is performed by history matching the injection pressure vs. the steam-rate data with a model developed in the thermal wellbore simulator. A dynamic pressure gradient (under flowing conditions) inside the injection string carrying the OCDs is obtained with a temperature log, taken with fiber-optic technology, in which the temperature data are converted to pressure by virtue of the properties of saturated steam. This method for measuring the dynamic pressure gradient during steam injection is novel for the SAGD industry.
The hydraulic field performance of the OCDs was matched successfully with the simulated model, which indicates the effectiveness of the design methodology, the field-performance-evaluation techniques, and the OCDs in delivering the desired amount of steam at each location.
|File Size||947 KB||Number of Pages||10|
Beggs, D.H. and Brill, J.P. 1973. A Study of Two-Phase Flow in Inclined Pipes. J Pet Technol 25 (5): 607–617. SPE-4007-PA. http://dx.doi.org/10.2118/4007-PA.
Butler, R.M. 1985. A New Approach to the Modelling of Steam-Assisted Gravity Drainage. J Can Pet Technol 24 (03): 42–51. PETSOC-85-03-01. http://dx.doi.org/10.2118/85-03-01.
Butler, R.M. 1994. Steam-Assisted Gravity Drainage: Concept, Development, Performance and Future. J Can Pet Technol 33 (02): 44–50. PETSOC-94-02-05. http://dx.doi.org/10.2118/94-02-05.
Chien, S.-F. 1990. Critical Flow of Wet Steam through Chokes. J Pet Technol 42 (03): 363–370. SPE-17575-PA. http://dx.doi.org/10.2118/17575-PA.
Clark, H.P., Ascanio, F.A., Van Kruijsdijk, C.P.J.W. et al. 2010. Method to Improve Thermal EOR Performance Using Intelligent Well Technology: Orion SAGD Field Trial. Presented at the Canadian Unconventional Resources and International Petroleum Conference, Calgary, 19–21 October. SPE-137133-MS. http://dx.doi.org/10.2118/137133-MS.
Duong, A.N. 2008. Thermal Transient Analysis Applied to Horizontal Wells. Presented at the International Thermal Operations and Heavy Oil Symposium, Calgary, 20–23 October. SPE-117435-MS. http://dx.doi.org/10.2118/117435-MS.
Edmunds, N. and Gittins, S.D. 1993. Effective Application of Steam Assisted Gravity Drainage of Bitumen to Long Horizontal Well Pairs. J Can Pet Technol 32 (06): 49–55. PETSOC-93-06-05. http://dx.doi.org/10.2118/93-06-05.
Farshad, F.F. and Rieke, H.H. 2006. Surface-Roughness Design Values for Modern Pipes. SPE Drill & Compl 21 (03): 212–215. SPE-89040-PA. http://dx.doi.org/10.2118/89040-PA.
Fram, J.H., Sims, J.C., Sequera, A. et al. 2010. Addressing Horizontal Steam Injection Completions Challenges with Chevron. Presented at the SPE Western Regional Meeting, Anaheim, California, 27–29 May. SPE-132410-MS. http://dx.doi.org/10.2118/132410-MS.
Komery, D.P., Luhning, R.W., and O’Rourke, J.G. 1999. Towards Commercialization of the UTF Project Using Surface Drilled Horizontal SAGD Wells. J Can Pet Technol 38 (09): 36–43. PETSOC-99-09-03. http://dx.doi.org/10.2118/99-09-03.
Medina, M. and Wat, R.M.S. 2012. Integrating Wellbore Hydraulics, Reservoir Properties, and Thermal Transient Analysis for SAGD Injector Well Completion Design with Multiple Outflow Control Devices: A Case Study. Presented at the SPE Western Regional Meeting, Bakersfield, California, 21–23 March. SPE-153909-MS. http://dx.doi.org/10.2118/153909-MS.
Tan, T.B., Butterworth, E., and Yang, P. 2002. Application of a Thermal Simulator with Fully Coupled Discretized Wellbore Simulation to SAGD. J Can Pet Technol 41 (01): 25–30. PETSOC-02-01-01. http://dx.doi.org/10.2118/02-01-01.
Vander-Valk, P.A. and Yang, P. 2007. Investigation of Key Parameters in SAGD Wellbore Design and Operation. J Can Pet Technol 46 (06): 49–56. PETSOC-07-06-02. http://dx.doi.org/10.2118/07-06-02.
Zhong, L., Zhang, S., Wu, F. et al. 2012. Improved Heavy-Oil Recovery by Separated-Zones Horizontal-Well Steam Stimulation. J Can Pet Technol 51 (02): 106–114. SPE-134291-PA. http://dx.doi.org/10.2118/134291-PA.